Colin Ian King [Wed, 2 Mar 2016 13:50:25 +0000 (13:50 +0000)] 
tools/power turbostat: fix various build warnings
When building with gcc 6 we're getting various build warnings that just
require some trivial function declaration and call fixes:
turbostat.c: In function ‘dump_cstate_pstate_config_info’:
turbostat.c:1973:1: warning: type of ‘family’ defaults to ‘int’
dump_cstate_pstate_config_info(family, model)
turbostat.c:1973:1: warning: type of ‘model’ defaults to ‘int’
turbostat.c: In function ‘get_tdp’:
turbostat.c:2145:8: warning: type of ‘model’ defaults to ‘int’
double get_tdp(model)
turbostat.c: In function ‘perf_limit_reasons_probe’:
turbostat.c:2259:6: warning: type of ‘family’ defaults to ‘int’
void perf_limit_reasons_probe(family, model)
turbostat.c:2259:6: warning: type of ‘model’ defaults to ‘int’
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-wbicer8n0s9qe6ql8h9x478e@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Colin Ian King [Wed, 2 Mar 2016 12:55:22 +0000 (12:55 +0000)]
perf tests: Initialize sa.sa_flags
The sa_flags field is not being initialized, so a garbage value is being
passed to sigaction. Initialize it to zero.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1456923322-29697-1-git-send-email-colin.king@canonical.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Wed, 2 Mar 2016 12:58:00 +0000 (09:58 -0300)] 
perf test: Fix hists related entries
That got broken by
d3a72fd8187b ("perf report: Fix indentation of
dynamic entries in hierarchy"), by using the evlist in setup_sorting()
without checking if it is NULL, as done in some 'perf test' entries:
$ find tools/ -name "*.c" | xargs grep 'setup_sorting(NULL);'
tools/perf/tests/hists_output.c: setup_sorting(NULL);
tools/perf/tests/hists_output.c: setup_sorting(NULL);
tools/perf/tests/hists_output.c: setup_sorting(NULL);
tools/perf/tests/hists_output.c: setup_sorting(NULL);
tools/perf/tests/hists_output.c: setup_sorting(NULL);
tools/perf/tests/hists_cumulate.c: setup_sorting(NULL);
tools/perf/tests/hists_cumulate.c: setup_sorting(NULL);
tools/perf/tests/hists_cumulate.c: setup_sorting(NULL);
tools/perf/tests/hists_cumulate.c: setup_sorting(NULL);
$
Fix it.
Before:
[root@jouet ~]# perf test
<SNIP>
15: Test matching and linking multiple hists : FAILED!
16: Try 'import perf' in python, checking link problems : Ok
17: Test breakpoint overflow signal handler : Ok
18: Test breakpoint overflow sampling : Ok
19: Test number of exit event of a simple workload : Ok
20: Test software clock events have valid period values : Ok
21: Test object code reading : Ok
22: Test sample parsing : Ok
23: Test using a dummy software event to keep tracking : Ok
24: Test parsing with no sample_id_all bit set : Ok
25: Test filtering hist entries : FAILED!
26: Test mmap thread lookup : Ok
27: Test thread mg sharing : Ok
28: Test output sorting of hist entries : FAILED!
29: Test cumulation of child hist entries : FAILED!
<SNIP>
After the patch the above failed tests complete successfully.
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: d3a72fd8187b ("perf report: Fix indentation of dynamic entries in hierarchy")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Steven Rostedt (Red Hat) [Tue, 9 Feb 2016 20:40:17 +0000 (15:40 -0500)] 
tools lib traceevent: Fix output of %llu for 64 bit values read on 32 bit machines
When a long value is read on 32 bit machines for 64 bit output, the
parsing needs to change "%lu" into "%llu", as the value is read
natively.
Unfortunately, if "%llu" is already there, the code will add another "l"
to it and fail to parse it properly.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20160209204237.337024613@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Steven Rostedt (Red Hat) [Tue, 9 Feb 2016 20:40:16 +0000 (15:40 -0500)]
tools lib traceevent: Set int_array fields to NULL if freeing from error
Had a bug where on error of parsing __print_array() where the fields are
freed after they were allocated, but since they were not set to NULL,
the freeing of the arg also tried to free the already freed fields
causing a double free.
Fix process_hex() while at it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20160209204237.188327674@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Chaos.Chen [Tue, 9 Feb 2016 20:40:14 +0000 (15:40 -0500)] 
tools lib traceevent: Fix time stamp rounding issue
When rounding to microseconds, if the timestamp subsecond is between
.
999999500 and .
999999999, it is rounded to .
1000000, when it should
instead increment the second counter due to the overflow.
For example, if the timestamp is 1234.
999999501 instead of seeing:
1235.000000
we see:
1234.
1000000
Signed-off-by: Chaos.Chen <rainboy1215@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20160209204236.824426460@goodmis.org
[ fixed incrementing "secs" instead of decrementing it ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Colin Ian King [Tue, 1 Mar 2016 23:46:20 +0000 (23:46 +0000)]
perf script: Fix double free on command_line
The 'command_line' variable is free'd twice if db_export__branch_types()
fails. To avoid this, defer the free'ing of 'command_line' to after this
call so that the error return path will just free 'command_line' once.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Javi Merino <javi.merino@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1456875980-25606-1-git-send-email-colin.king@canonical.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Masahiro Yamada [Sun, 31 Jan 2016 17:59:00 +0000 (02:59 +0900)] 
tools build: Use .s extension for preprocessed assembler code
The "man gcc" says .i extension represents the file is C source code
that should not be preprocessed. Here, .s should be used.
For clarification,
.c ---(preprocess)---> .i
.S ---(preprocess)---> .s
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Lukas Wunner <lukas@wunner.de>
Link: http://lkml.kernel.org/r/1454263140-19670-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Mon, 29 Feb 2016 22:36:22 +0000 (14:36 -0800)] 
perf stat: Support metrics in --per-core/socket mode
Enable metrics printing in --per-core / --per-socket mode. We need to
save the shadow metrics in a unique place. Always use the first CPU in
the aggregation. Then use the same CPU to retrieve the shadow value
later.
Example output:
% perf stat --per-core -a ./BC1s
Performance counter stats for 'system wide':
S0-C0 2 2966.020381 task-clock (msec) # 2.004 CPUs utilized (100.00%)
S0-C0 2 49 context-switches # 0.017 K/sec (100.00%)
S0-C0 2 4 cpu-migrations # 0.001 K/sec (100.00%)
S0-C0 2 467 page-faults # 0.157 K/sec
S0-C0 2 4,599,061,773 cycles # 1.551 GHz (100.00%)
S0-C0 2 9,755,886,883 instructions # 2.12 insn per cycle (100.00%)
S0-C0 2 1,906,272,125 branches # 642.704 M/sec (100.00%)
S0-C0 2 81,180,867 branch-misses # 4.26% of all branches
S0-C1 2 2965.995373 task-clock (msec) # 2.003 CPUs utilized (100.00%)
S0-C1 2 62 context-switches # 0.021 K/sec (100.00%)
S0-C1 2 8 cpu-migrations # 0.003 K/sec (100.00%)
S0-C1 2 281 page-faults # 0.095 K/sec
S0-C1 2 6,347,290 cycles # 0.002 GHz (100.00%)
S0-C1 2 4,654,156 instructions # 0.73 insn per cycle (100.00%)
S0-C1 2 947,121 branches # 0.319 M/sec (100.00%)
S0-C1 2 37,322 branch-misses # 3.94% of all branches
1.
480409747 seconds time elapsed
v2: Rebase to older patches
v3: Document shadow cpus. Fix aggr_get_id argument. Fix -A shadows (Jiri)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1456785386-19481-4-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Mon, 29 Feb 2016 22:36:21 +0000 (14:36 -0800)]
perf stat: Implement CSV metrics output
Now support CSV output for metrics. With the new output callbacks this
is relatively straight forward by creating new callbacks.
This allows to easily plot metrics from CSV files.
The new line callback needs to know the number of fields to skip them
correctly
Example output before:
% perf stat -x, true
0.200687,,task-clock,200687,100.00
0,,context-switches,200687,100.00
0,,cpu-migrations,200687,100.00
40,,page-faults,200687,100.00
730871,,cycles,203601,100.00
551056,,stalled-cycles-frontend,203601,100.00
<not supported>,,stalled-cycles-backend,0,100.00
385523,,instructions,203601,100.00
78028,,branches,203601,100.00
3946,,branch-misses,203601,100.00
After:
% perf stat -x, true
.502457,,task-clock,502457,100.00,0.485,CPUs utilized
0,,context-switches,502457,100.00,0.000,K/sec
0,,cpu-migrations,502457,100.00,0.000,K/sec
45,,page-faults,502457,100.00,0.090,M/sec
644692,,cycles,509102,100.00,1.283,GHz
423470,,stalled-cycles-frontend,509102,100.00,65.69,frontend cycles idle
<not supported>,,stalled-cycles-backend,0,100.00,,,,
492701,,instructions,509102,100.00,0.76,insn per cycle
,,,,,0.86,stalled cycles per insn
97767,,branches,509102,100.00,194.578,M/sec
4788,,branch-misses,509102,100.00,4.90,of all branches
or easier readable
$ perf stat -x, -o x.csv true
$ column -s, -t x.csv
0.490635 task-clock 490635 100.00 0.489 CPUs utilized
0 context-switches 490635 100.00 0.000 K/sec
0 cpu-migrations 490635 100.00 0.000 K/sec
45 page-faults 490635 100.00 0.092 M/sec
629080 cycles 497698 100.00 1.282 GHz
409498 stalled-cycles-frontend 497698 100.00 65.09 frontend cycles idle
<not supported> stalled-cycles-backend 0 100.00
491424 instructions 497698 100.00 0.78 insn per cycle
0.83 stalled cycles per insn
97278 branches 497698 100.00 198.270 M/sec
4569 branch-misses 497698 100.00 4.70 of all branches
Two new fields are added: metric value and metric name.
v2: Split out function argument changes
v3: Reenable metrics for real.
v4: Fix wrong hunk from refactoring.
v5: Remove extra "noise" printing (Jiri), but add it to the not counted case.
Print empty metrics for not counted.
v6: Avoid outputting metric on empty format.
v7: Print metric at the end
v8: Remove extra run, ena fields
v9: Avoid extra new line for unsupported counters
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/r/1456785386-19481-3-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:32:17 +0000 (09:32 +0000)] 
perf record: Ensure return non-zero rc when mmap fail
perf_evlist__mmap_ex() can fail without setting errno (for example, fail
in condition checking. In this case all syscall is success).
If this happen, record__open() incorrectly returns 0. Force setting rc
is a quick way to avoid this problem, or we have to follow all possible
code path in perf_evlist__mmap_ex() to make sure there's at least one
system call before returning an error.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-30-git-send-email-wangnan0@huawei.com
Signed-off-by: He Kuang <hekuang@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:32:10 +0000 (09:32 +0000)]
perf record: Introduce record__finish_output() to finish a perf.data
Move code for finalizing 'perf.data' to record__finish_output(). It will
be used by following commits to split output to multiple files.
Signed-off-by: He Kuang <hekuang@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-23-git-send-email-wangnan0@huawei.com
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:32:07 +0000 (09:32 +0000)]
perf record: Extract synthesize code to record__synthesize()
Create record__synthesize(). It can be used to create tracking events
for each perf.data after perf supporting splitting into multiple
outputs.
Signed-off-by: He Kuang <hekuang@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-20-git-send-email-wangnan0@huawei.com
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:32:06 +0000 (09:32 +0000)]
perf record: Use WARN_ONCE to replace 'if' condition
Commits in a BPF patchkit will extract kernel and module synthesizing
code into a separated function and call it multiple times. This patch
replace 'if (err < 0)' using WARN_ONCE, makes sure the error message
show one time.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-19-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:31:57 +0000 (09:31 +0000)]
perf data: Explicitly set byte order for integer types
After babeltrace commit
5cec03e402aa ("ir: copy variants and sequences
when setting a field path"), 'perf data convert' gets incorrect result
if there's bpf output data. For example:
# perf data convert --to-ctf ./out.ctf
# babeltrace ./out.ctf
[10:44:31.
186045346] (+?.?????????) evt: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF810E7DD1, perf_tid = 23819, perf_pid = 23819, perf_id = 518, raw_len = 3, raw_data = [ [0] = 0xC028E32F, [1] = 0x815D0100, [2] = 0x1000000 ] }
[10:44:31.
286101003] (+0.
100055657) evt: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF8105B609, perf_tid = 23819, perf_pid = 23819, perf_id = 518, raw_len = 3, raw_data = [ [0] = 0x35D9F1EB, [1] = 0x15D81, [2] = 0x2 ] }
The expected result of the first sample should be:
raw_data = [ [0] = 0x2FE328C0, [1] = 0x15D81, [2] = 0x1 ] }
however, 'perf data convert' output big endian value to resuling CTF
file.
The reason is a internal change (or a bug?) of babeltrace.
Before this patch, at the first add_bpf_output_values(), byte order of
all integer type is uncertain (is 0, neither 1234 (le) nor 4321 (be)).
It would be fixed by:
perf_evlist__deliver_sample
-> process_sample_event
-> ctf_stream
...
->bt_ctf_trace_add_stream_class
->bt_ctf_field_type_structure_set_byte_order
->bt_ctf_field_type_integer_set_byte_order
during creating the stream.
However, the babeltrace commit mentioned above duplicates types in
sequence to prevent potential conflict in following call stack and link
the newly allocated type into the 'raw_data' sequence:
perf_evlist__deliver_sample
-> process_sample_event
-> ctf_stream
...
-> bt_ctf_trace_add_stream_class
-> bt_ctf_stream_class_resolve_types
...
-> bt_ctf_field_type_sequence_copy
->bt_ctf_field_type_integer_copy
This happens before byte order setting, so only the newly allocated
type is initialized, the byte order of original type perf choose to
create the first raw_data is still uncertain.
Byte order in CTF output is not related to byte order in perf.data.
Setting it to anything other than BT_CTF_BYTE_ORDER_NATIVE solves this
problem (only BT_CTF_BYTE_ORDER_NATIVE needs to be fixed). To reduce
behavior changing, set byte order according to compiling options.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jeremie Galarneau <jeremie.galarneau@efficios.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-10-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:31:56 +0000 (09:31 +0000)]
perf data: Support converting data from bpf_perf_event_output()
bpf_perf_event_output() outputs data through sample->raw_data. This
patch adds support to convert those data into CTF. A python script then
can be used to process output data from BPF programs.
Test result:
# cat ./test_bpf_output_2.c
/************************ BEGIN **************************/
#include <uapi/linux/bpf.h>
struct bpf_map_def {
unsigned int type;
unsigned int key_size;
unsigned int value_size;
unsigned int max_entries;
};
#define SEC(NAME) __attribute__((section(NAME), used))
static u64 (*ktime_get_ns)(void) =
(void *)BPF_FUNC_ktime_get_ns;
static int (*trace_printk)(const char *fmt, int fmt_size, ...) =
(void *)BPF_FUNC_trace_printk;
static int (*get_smp_processor_id)(void) =
(void *)BPF_FUNC_get_smp_processor_id;
static int (*perf_event_output)(void *, struct bpf_map_def *, int, void *, unsigned long) =
(void *)BPF_FUNC_perf_event_output;
struct bpf_map_def SEC("maps") channel = {
.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(u32),
.max_entries = __NR_CPUS__,
};
static inline int __attribute__((always_inline))
func(void *ctx, int type)
{
struct {
u64 ktime;
int type;
} __attribute__((packed)) output_data;
char error_data[] = "Error: failed to output\n";
int err;
output_data.type = type;
output_data.ktime = ktime_get_ns();
err = perf_event_output(ctx, &channel, get_smp_processor_id(),
&output_data, sizeof(output_data));
if (err)
trace_printk(error_data, sizeof(error_data));
return 0;
}
SEC("func_begin=sys_nanosleep")
int func_begin(void *ctx) {return func(ctx, 1);}
SEC("func_end=sys_nanosleep%return")
int func_end(void *ctx) { return func(ctx, 2);}
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
/************************* END ***************************/
# ./perf record -e bpf-output/no-inherit,name=evt/ \
-e ./test_bpf_output_2.c/map:channel.event=evt/ \
usleep 100000
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.012 MB perf.data (2 samples) ]
# ./perf script
usleep 14942 92503.198504: evt:
ffffffff810e0ba1 sys_nanosleep (/lib/modules/4.3.0....
usleep 14942 92503.298562: evt:
ffffffff810585e9 kretprobe_trampoline_holder (/lib....
# ./perf data convert --to-ctf ./out.ctf
[ perf data convert: Converted 'perf.data' into CTF data './out.ctf' ]
[ perf data convert: Converted and wrote 0.000 MB (2 samples) ]
# babeltrace ./out.ctf
[01:41:43.
198504134] (+?.?????????) evt: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF810E0BA1, perf_tid = 14942, perf_pid = 14942, perf_id = 1044, raw_len = 3, raw_data = [ [0] = 0x32C0C07B, [1] = 0x5421, [2] = 0x1 ] }
[01:41:43.
298562257] (+0.
100058123) evt: { cpu_id = 0 }, { perf_ip = 0xFFFFFFFF810585E9, perf_tid = 14942, perf_pid = 14942, perf_id = 1044, raw_len = 3, raw_data = [ [0] = 0x38B77FAA, [1] = 0x5421, [2] = 0x2 ] }
# cat ./test_bpf_output_2.py
from babeltrace import TraceCollection
tc = TraceCollection()
tc.add_trace('./out.ctf', 'ctf')
d = {1:[], 2:[]}
for event in tc.events:
if not event.name.startswith('evt'):
continue
raw_data = event['raw_data']
(time, type) = ((raw_data[0] + (raw_data[1] << 32)), raw_data[2])
d[type].append(time)
print(list(map(lambda i: d[2][i] - d[1][i], range(len(d[1])))));
# python3 ./test_bpf_output_2.py
[
100056879]
Committer note:
Make sure you have python3-devel installed, not python-devel, which may
be for python2, which will lead to some "PyInstance_Type" errors. Also
make sure that you use the right libbabeltrace, because it is shipped
in Fedora, for instance, but an older version.
To build libbabeltrace's python binding one also needs to use:
./configure --enable-python-bindings
And then set PYTHONPATH=/usr/local/lib64/python3.4/site-packages/.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-9-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Sat, 27 Feb 2016 00:27:56 +0000 (16:27 -0800)]
perf stat: Check existence of frontend/backed stalled cycles
Only put the frontend/backend stalled cycles into the default perf stat
events when the CPU actually supports them.
This avoids empty columns with --metric-only on newer Intel CPUs.
Committer note:
Before:
$ perf stat ls
Performance counter stats for 'ls':
1.080893 task-clock (msec) # 0.619 CPUs utilized
0 context-switches # 0.000 K/sec
0 cpu-migrations # 0.000 K/sec
97 page-faults # 0.090 M/sec
3,327,741 cycles # 3.079 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
1,609,544 instructions # 0.48 insn per cycle
319,117 branches # 295.235 M/sec
12,246 branch-misses # 3.84% of all branches
0.
001746508 seconds time elapsed
$
After:
$ perf stat ls
Performance counter stats for 'ls':
0.693948 task-clock (msec) # 0.662 CPUs utilized
0 context-switches # 0.000 K/sec
0 cpu-migrations # 0.000 K/sec
95 page-faults # 0.137 M/sec
1,792,509 cycles # 2.583 GHz
1,599,047 instructions # 0.89 insn per cycle
316,328 branches # 455.838 M/sec
12,453 branch-misses # 3.94% of all branches
0.
001048987 seconds time elapsed
$
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1456532881-26621-2-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 3 Mar 2016 09:53:48 +0000 (10:53 +0100)] 
perf tools: Fix locale handling in pmu parsing
Ingo reported regression on display format of big numbers, which is
missing separators (in default perf stat output).
triton:~/tip> perf stat -a sleep 1
...
127008602 cycles # 0.011 GHz
279538533 stalled-cycles-frontend # 220.09% frontend cycles idle
119213269 instructions # 0.94 insn per cycle
This is caused by recent change:
perf stat: Check existence of frontend/backed stalled cycles
that added call to pmu_have_event, that subsequently calls
perf_pmu__parse_scale, which has a bug in locale handling.
The lc string returned from setlocale, that we use to store old locale
value, may be allocated in static storage. Getting a dynamic copy to
make it survive another setlocale call.
$ perf stat ls
...
2,360,602 cycles # 3.080 GHz
2,703,090 instructions # 1.15 insn per cycle
546,031 branches # 712.511 M/sec
Committer note:
Since the patch introducing the regression didn't made to perf/core,
move it to just before where the regression was introduced, so that we
don't break bisection for this feature.
Reported-by: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20160303095348.GA24511@krava.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Steven Rostedt [Mon, 29 Feb 2016 14:01:28 +0000 (09:01 -0500)]
tools lib traceevent: Split pevent_print_event() into specific functionality functions
Currently there's a single function that is used to display a record's
data in human readable format. That's pevent_print_event().
Unfortunately, this gives little room for adding other output within the
line without updating that function call.
I've decided to split that function into 3 parts.
pevent_print_event_task() which prints the task comm, pid and the CPU
pevent_print_event_time() which outputs the record's timestamp
pevent_print_event_data() which outputs the rest of the event data.
pevent_print_event() now simply calls these three functions.
To save time from doing the search for event from the record's type, I
created a new helper function called pevent_find_event_by_record(),
which returns the record's event, and this event has to be passed to the
above functions.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20160229090128.43a56704@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Taeung Song [Fri, 26 Feb 2016 18:23:01 +0000 (13:23 -0500)] 
tracing/syscalls: Rename "/format" tracepoint field name "nr" to "__syscall_nr:
Some tracepoint have multiple fields with the same name, "nr", the first
one is a unique syscall ID, the other is a syscall argument:
# cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
name: sys_enter_io_getevents
ID: 747
format:
field:unsigned short common_type; offset:0; size:2; signed:0;
field:unsigned char common_flags; offset:2; size:1; signed:0;
field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
field:int common_pid; offset:4; size:4; signed:1;
field:int nr; offset:8; size:4; signed:1;
field:aio_context_t ctx_id; offset:16; size:8; signed:0;
field:long min_nr; offset:24; size:8; signed:0;
field:long nr; offset:32; size:8; signed:0;
field:struct io_event * events; offset:40; size:8; signed:0;
field:struct timespec * timeout; offset:48; size:8; signed:0;
print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx, events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)), ((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)), ((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
#
Fix it by renaming the "/format" common tracepoint field "nr" to "__syscall_nr".
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
[ Do not rename the struct member, just the '/format' field name ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160226132301.3ae065a4@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Taeung Song [Fri, 26 Feb 2016 13:14:25 +0000 (22:14 +0900)]
perf trace: Check and discard not only 'nr' but also '__syscall_nr'
Format fields of a syscall have the first variable '__syscall_nr' or
'nr' that mean the syscall number. But it isn't relevant here so drop
it.
'nr' among fields of syscall was renamed '__syscall_nr'. So add
exception handling to drop '__syscall_nr' and modify the comment for
this excpetion handling.
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1456492465-5946-1-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sat, 27 Feb 2016 20:21:12 +0000 (21:21 +0100)]
perf tools: Fix python extension build
The util/python-ext-sources file contains source files required to build
the python extension relative to $(srctree)/tools/perf,
Such a file path $(FILE).c is handed over to the python extension build
system, which builds the final object in the
$(PYTHON_EXTBUILD)/tmp/$(FILE).o path.
After the build is done all files from $(PYTHON_EXTBUILD)lib/ are
carried as the result binaries.
Above system fails when we add source file relative to ../lib, which we
do for:
../lib/bitmap.c
../lib/find_bit.c
../lib/hweight.c
../lib/rbtree.c
All above objects will be built like:
$(PYTHON_EXTBUILD)/tmp/../lib/bitmap.c
$(PYTHON_EXTBUILD)/tmp/../lib/find_bit.c
$(PYTHON_EXTBUILD)/tmp/../lib/hweight.c
$(PYTHON_EXTBUILD)/tmp/../lib/rbtree.c
which accidentally happens to be final library path:
$(PYTHON_EXTBUILD)/lib/
Changing setup.py to pass full paths of source files to Extension build
class and thus keep all built objects under $(PYTHON_EXTBUILD)tmp
directory.
Reported-by: Jeff Bastian <jbastian@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: stable@vger.kernel.org # v4.2+
Link: http://lkml.kernel.org/r/20160227201350.GB28494@krava.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:27 +0000 (22:19 +0000)] 
perf: Export perf_event_sysfs_show()
Required to use it in modular perf drivers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.930735780@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:26 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Convert it to a per package facility
RAPL is a per package facility and we already have a mechanism for a dedicated
per package reader. So there is no point to have multiple CPUs doing the
same. The current implementation actually starts two timers on two CPUs if one
does:
perf stat -C1,2 -e -e power/energy-pkg ....
which makes the whole concept of 1 reader per package moot.
What's worse is that the above returns the double of the actual energy
consumption, but that's a different problem to address and cannot be solved by
removing the pointless per cpuness of that mechanism.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.845369524@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:25 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Utilize event->pmu_private
Store the PMU pointer in event->pmu_private and use it instead of the per CPU
data. Preparatory step to get rid of the per CPU allocations. The usage sites
are the perf fast path, so we keep that even after the conversion to per
package storage as a CPU to package lookup involves 3 loads versus 1 with the
pmu_private pointer.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.748151799@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:25 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Make PMU lock raw
This lock is taken in hard interrupt context even on Preempt-RT. Make it raw
so RT does not have to patch it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.669411833@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:24 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Refactor the code some more
Split out code from init into seperate functions. Tidy up the code and get rid
of pointless comments. I wish there would be comments for code which is not
obvious....
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.588544679@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:23 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Clean up the printk output
The output is inconsistent. Use a proper pr_fmt prefix and split out the
advertisement into a seperate function.
Remove the WARN_ON() in the failure case. It's pointless as we already know
where it failed.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.504551295@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:22 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Calculate timing once
No point in doing the same calculation over and over. Do it once in
rapl_check_hw_unit().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.409238136@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:22 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Sanitize the quirk handling
There is no point in having a quirk machinery for a single possible
function. Get rid of it and move the quirk to a place where it actually
makes sense.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.311639465@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:21 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Add proper error handling
Like uncore the rapl driver lacks error handling. It leaks memory and leaves
the hotplug notifier registered.
Add the proper error checks, cleanup the memory and register the hotplug
notifier only on success.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.231222076@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:20 +0000 (22:19 +0000)]
perf/x86/intel/rapl: Make Knights Landings support functional
The Knights Landings support added the events and the detection case, but then
returns 0 without actually initializing the driver.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Fixes: 3a2a7797326a4 "perf/x86/intel/rapl: Add support for Knights Landing (KNL)"
Link: http://lkml.kernel.org/r/20160222221012.149331888@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:20 +0000 (22:19 +0000)]
perf/x86/intel/cqm: Get rid of the silly for_each_cpu() lookups
CQM is a strict per package facility. Use the proper cpumasks to lookup the
readers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.054916179@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:18 +0000 (22:19 +0000)]
cpumask: Export cpumask_any_but()
Almost every cpumask function is exported, just not the one I need to make the
Intel uncore driver modular.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.878299859@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:17 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Make PCI and MSR uncore independent
Andi wanted to do this before, but the patch fell down the cracks. Implement
it with the proper error handling.
Requested-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.799159968@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:17 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Clear all hardware state on exit
The only missing bit is to completely clear the hardware state on failure
exit. This is now a pretty simple exercise.
Undo the box->init_box() setup on all packages which have been initialized so
far.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.702452407@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:16 +0000 (22:19 +0000)]
perf/x86/uncore: Track packages, not per CPU data
Uncore is a per package facility, but the code tries to mimick a per CPU
facility with completely convoluted constructs.
Simplify the whole machinery by tracking per package information. While at it,
avoid the kfree/alloc dance when a CPU goes offline and online again. There is
no point in freeing the box after it was allocated. We just keep proper
refcounting and the first CPU which comes online in a package does the
initialization/activation of the box.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.622258933@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:15 +0000 (22:19 +0000)]
x86/topology: Create logical package id
For per package oriented services we must be able to rely on the number of CPU
packages to be within bounds. Create a tracking facility, which
- calculates the number of possible packages depending on nr_cpu_ids after boot
- makes sure that the package id is within the number of possible packages. If
the apic id is outside we map it to a logical package id if there is enough
space available.
Provide interfaces for drivers to query the mapping and do translations from
physcial to logical ids.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.541071755@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:14 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Store box in event->pmu_private
Store the PMU pointer in event->pmu_private, so we can get rid of the
per CPU data storage.
We keep it after converting to per package data, because a CPU to
package lookup will be 3 loads versus one and these usage sites are
in the perf fast path.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.460851335@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:14 +0000 (22:19 +0000)]
perf: Allow storage of PMU private data in event
For PMUs which are not per CPU, but e.g. per package/socket, we want to be
able to store a reference to the underlying per package/socket facility in the
event at init time so we can avoid magic storage constructs in the PMU driver.
This allows us to get rid of the per CPU dance in the intel uncore and RAPL
drivers and avoids a lookup of the per package data in the perf hotpath.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.364140369@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:13 +0000 (22:19 +0000)]
perf/x86/uncore: Make uncore_pcibus_to_physid() static
No users outside of this file.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.285504825@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:12 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Make code more readable
Clean up the code a bit before reworking it completely.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.204771538@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:11 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Clean up hardware on exit
When tearing down the boxes nothing undoes the hardware state which was setup
by box->init_box(). Add a box->exit_box() callback and implement it for the
uncores which have an init_box() callback.
This misses the cleanup in the error exit pathes, but I cannot be bothered to
implement it before cleaning up the rest of the driver, which makes that task
way simpler.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221011.023930023@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:10 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Add sanity checks for PCI dev package id
The storage array is size limited, but misses a sanity check
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221010.929967806@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:09 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Fix error handling
This driver lacks any form of proper error handling. If initialization fails
or hotplug prepare fails, it lets the facility with half initialized stuff
around.
Fix the state and memory leaks in a first step. As a second step we need to
undo the hardware state which is set via uncore_box_init() on some of the
uncore implementations.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221010.848880559@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:09 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Simplify error rollback
No point in doing partial rollbacks. Robustify uncore_exit_type() so it does
not dereference type->pmus unconditionally and remove all the partial rollback
hackery.
Preparatory patch for proper error handling.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221010.751077467@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thomas Gleixner [Mon, 22 Feb 2016 22:19:08 +0000 (22:19 +0000)]
perf/x86/intel/uncore: Remove pointless mask check
uncore_cpumask_init() is only ever called from intel_uncore_init() where the
mask is guaranteed to be empty.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221010.657326866@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Fri, 26 Feb 2016 09:35:45 +0000 (10:35 +0100)] 
perf: Add a reviewer
Alexander volunteered to review perf (kernel) patches.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Kan Liang [Wed, 24 Feb 2016 10:07:43 +0000 (05:07 -0500)] 
perf/x86/intel/uncore: Remove SBOX support for BDX-DE
BDX-DE and BDX-EP share the same uncore code path. But there is no sbox
in BDX-DE. This patch remove SBOX support for BDX-DE.
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: <tonyb@cybernetics.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Battersby <tonyb@cybernetics.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/37D7C6CF3E00A74B8858931C1DB2F0770589D336@SHSMSX103.ccr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Mon, 29 Feb 2016 08:04:01 +0000 (09:04 +0100)] 
Merge tag 'v4.5-rc6' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds [Sun, 28 Feb 2016 16:41:20 +0000 (08:41 -0800)] 
Linux 4.5-rc6
Linus Torvalds [Sun, 28 Feb 2016 15:52:00 +0000 (07:52 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A rather largish series of 12 patches addressing a maze of race
conditions in the perf core code from Peter Zijlstra"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: Robustify task_function_call()
perf: Fix scaling vs. perf_install_in_context()
perf: Fix scaling vs. perf_event_enable()
perf: Fix scaling vs. perf_event_enable_on_exec()
perf: Fix ctx time tracking by introducing EVENT_TIME
perf: Cure event->pending_disable race
perf: Fix race between event install and jump_labels
perf: Fix cloning
perf: Only update context time when active
perf: Allow perf_release() with !event->ctx
perf: Do not double free
perf: Close install vs. exit race
Linus Torvalds [Sun, 28 Feb 2016 15:49:23 +0000 (07:49 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"This update contains:
- Hopefully the last ASM CLAC fixups
- A fix for the Quark family related to the IMR lock which makes
kexec work again
- A off-by-one fix in the MPX code. Ironic, isn't it?
- A fix for X86_PAE which addresses once more an unsigned long vs
phys_addr_t hickup"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mpx: Fix off-by-one comparison with nr_registers
x86/mm: Fix slow_virt_to_phys() for X86_PAE again
x86/entry/compat: Add missing CLAC to entry_INT80_32
x86/entry/32: Add an ASM_CLAC to entry_SYSENTER_32
x86/platform/intel/quark: Change the kernel's IMR lock bit to false
Linus Torvalds [Sun, 28 Feb 2016 15:48:01 +0000 (07:48 -0800)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler fixlet from Thomas Gleixner:
"A trivial printk typo fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/deadline: Fix trivial typo in printk() message
Linus Torvalds [Sun, 28 Feb 2016 15:45:58 +0000 (07:45 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"Four small fixes for irqchip drivers:
- Add missing low level irq handler initialization on mxs, so
interrupts can acutally be delivered
- Add a missing barrier to the GIC driver
- Two fixes for the GIC-V3-ITS driver, addressing a double EOI write
and a cache flush beyond the actual region"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-v3: Add missing barrier to 32bit version of gic_read_iar()
irqchip/mxs: Add missing set_handle_irq()
irqchip/gicv3-its: Avoid cache flush beyond ITS_BASERn memory size
irqchip/gic-v3-its: Fix double ICC_EOIR write for LPI in EOImode==1
Linus Torvalds [Sun, 28 Feb 2016 15:39:15 +0000 (07:39 -0800)]
Merge tag 'staging-4.5-rc6' of git://git./linux/kernel/git/gregkh/staging
Pull staging/android fix from Greg KH:
"Here is one patch, for the android binder driver, to resolve a
reported problem. Turns out it has been around for a while (since
3.15), so it is good to finally get it resolved.
It has been in linux-next for a while with no reported issues"
* tag 'staging-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
drivers: android: correct the size of struct binder_uintptr_t for BC_DEAD_BINDER_DONE
Linus Torvalds [Sun, 28 Feb 2016 15:37:30 +0000 (07:37 -0800)]
Merge tag 'usb-4.5-rc6' of git://git./linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a few USB fixes for 4.5-rc6
They fix a reported bug for some USB 3 devices by reverting the recent
patch, a MAINTAINERS change for some drivers, some new device ids, and
of course, the usual bunch of USB gadget driver fixes.
All have been in linux-next for a while with no reported issues"
* tag 'usb-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
MAINTAINERS: drop OMAP USB and MUSB maintainership
usb: musb: fix DMA for host mode
usb: phy: msm: Trigger USB state detection work in DRD mode
usb: gadget: net2280: fix endpoint max packet for super speed connections
usb: gadget: gadgetfs: unregister gadget only if it got successfully registered
usb: gadget: remove driver from pending list on probe error
Revert "usb: hub: do not clear BOS field during reset device"
usb: chipidea: fix return value check in ci_hdrc_pci_probe()
usb: chipidea: error on overflow for port_test_write
USB: option: add "4G LTE usb-modem U901"
USB: cp210x: add IDs for GE B650V3 and B850V3 boards
USB: option: add support for SIM7100E
usb: musb: Fix DMA desired mode for Mentor DMA engine
usb: gadget: fsl_qe_udc: fix IS_ERR_VALUE usage
usb: dwc2: USB_DWC2 should depend on HAS_DMA
usb: dwc2: host: fix the data toggle error in full speed descriptor dma
usb: dwc2: host: fix logical omissions in dwc2_process_non_isoc_desc
usb: dwc3: Fix assignment of EP transfer resources
usb: dwc2: Add extra delay when forcing dr_mode
Linus Torvalds [Sun, 28 Feb 2016 01:10:32 +0000 (17:10 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
do_last(): ELOOP failure exit should be done after leaving RCU mode
should_follow_link(): validate ->d_seq after having decided to follow
namei: ->d_inode of a pinned dentry is stable only for positives
do_last(): don't let a bogus return value from ->open() et.al. to confuse us
fs: return -EOPNOTSUPP if clone is not supported
hpfs: don't truncate the file when delete fails
Linus Torvalds [Sun, 28 Feb 2016 00:58:32 +0000 (16:58 -0800)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"We didn't have a batch last week, so this one is slightly larger.
None of them are scary though, a handful of fixes for small DT pieces,
replacing properties with newer conventions.
Highlights:
- N900 fix for setting system revision
- onenand init fix to avoid filesystem corruption
- Clock fix for audio on Beaglebone-x15
- Fixes on shmobile to deal with CONFIG_DEBUG_RODATA (default y in 4.6)
+ misc smaller stuff"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
MAINTAINERS: Extend info, add wiki and ml for meson arch
MAINTAINERS: alpine: add a new maintainer and update the entry
ARM: at91/dt: fix typo in sama5d2 pinmux descriptions
ARM: OMAP2+: Fix onenand initialization to avoid filesystem corruption
Revert "regulator: tps65217: remove tps65217.dtsi file"
ARM: shmobile: Remove shmobile_boot_arg
ARM: shmobile: Move shmobile_smp_{mpidr, fn, arg}[] from .text to .bss
ARM: shmobile: r8a7779: Remove remainings of removed SCU boot setup code
ARM: shmobile: Move shmobile_scu_base from .text to .bss
ARM: OMAP2+: Fix omap_device for module reload on PM runtime forbid
ARM: OMAP2+: Improve omap_device error for driver writers
ARM: DTS: am57xx-beagle-x15: Select SYS_CLK2 for audio clocks
ARM: dts: am335x/am57xx: replace gpio-key,wakeup with wakeup-source property
ARM: OMAP2+: Set system_rev from ATAGS for n900
ARM: dts: orion5x: fix the missing mtd flash on linkstation lswtgl
ARM: dts: kirkwood: use unique machine name for ds112
ARM: dts: imx6: remove bogus interrupt-parent from CAAM node
Al Viro [Sun, 28 Feb 2016 00:37:37 +0000 (19:37 -0500)] 
do_last(): ELOOP failure exit should be done after leaving RCU mode
... or we risk seeing a bogus value of d_is_symlink() there.
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 28 Feb 2016 00:31:01 +0000 (19:31 -0500)]
should_follow_link(): validate ->d_seq after having decided to follow
... otherwise d_is_symlink() above might have nothing to do with
the inode value we've got.
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 28 Feb 2016 00:23:16 +0000 (19:23 -0500)]
namei: ->d_inode of a pinned dentry is stable only for positives
both do_last() and walk_component() risk picking a NULL inode out
of dentry about to become positive, *then* checking its flags and
seeing that it's not negative anymore and using (already stale by
then) value they'd fetched earlier. Usually ends up oopsing soon
after that...
Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 28 Feb 2016 00:17:33 +0000 (19:17 -0500)]
do_last(): don't let a bogus return value from ->open() et.al. to confuse us
... into returning a positive to path_openat(), which would interpret that
as "symlink had been encountered" and proceed to corrupt memory, etc.
It can only happen due to a bug in some ->open() instance or in some LSM
hook, etc., so we report any such event *and* make sure it doesn't trick
us into further unpleasantness.
Cc: stable@vger.kernel.org # v3.6+, at least
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Christoph Hellwig [Fri, 26 Feb 2016 17:53:12 +0000 (18:53 +0100)] 
fs: return -EOPNOTSUPP if clone is not supported
-EBADF is a rather confusing error if an operations is not supported,
and nfsd gets rather upset about it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Mikulas Patocka [Thu, 25 Feb 2016 17:17:38 +0000 (18:17 +0100)] 
hpfs: don't truncate the file when delete fails
The delete opration can allocate additional space on the HPFS filesystem
due to btree split. The HPFS driver checks in advance if there is
available space, so that it won't corrupt the btree if we run out of space
during splitting.
If there is not enough available space, the HPFS driver attempted to
truncate the file, but this results in a deadlock since the commit
7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7 ("HPFS: Introduce a global mutex
and lock it on every callback from VFS").
This patch removes the code that tries to truncate the file and -ENOSPC is
returned instead. If the user hits -ENOSPC on delete, he should try to
delete other files (that are stored in a leaf btree node), so that the
delete operation will make some space for deleting the file stored in
non-leaf btree node.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: stable@vger.kernel.org # 2.6.39+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Sat, 27 Feb 2016 20:46:16 +0000 (12:46 -0800)]
Merge branch 'akpm' (patches from Andrew)
Merge fixes from Andrew Morton:
"10 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
dax: move writeback calls into the filesystems
dax: give DAX clearing code correct bdev
ext4: online defrag not supported with DAX
ext2, ext4: only set S_DAX for regular inodes
block: disable block device DAX by default
ocfs2: unlock inode if deleting inode from orphan fails
mm: ASLR: use get_random_long()
drivers: char: random: add get_random_long()
mm: numa: quickly fail allocations for NUMA balancing on full nodes
mm: thp: fix SMP race condition between THP page fault and MADV_DONTNEED
Linus Torvalds [Sat, 27 Feb 2016 20:40:49 +0000 (12:40 -0800)]
Merge tag 'tags/ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4
Pull ext2/4 DAX fix from Ted Ts'o:
"This fixes a file system corruption bug with DAX"
* tag 'tags/ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext2, ext4: fix issue with missing journal entry in ext4_dax_mkwrite()
Linus Torvalds [Sat, 27 Feb 2016 20:33:42 +0000 (12:33 -0800)]
Merge tag 'pci-v4.5-fixes-3' of git://git./linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"Enumeration:
Revert x86 pcibios_alloc_irq() to fix regression (Bjorn Helgaas)
Marvell MVEBU host bridge driver:
Restrict build to 32-bit ARM (Thierry Reding)"
* tag 'pci-v4.5-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: mvebu: Restrict build to 32-bit ARM
Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"
Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"
Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled"
Ross Zwisler [Sat, 27 Feb 2016 19:01:13 +0000 (14:01 -0500)] 
ext2, ext4: fix issue with missing journal entry in ext4_dax_mkwrite()
As it is currently written ext4_dax_mkwrite() assumes that the call into
__dax_mkwrite() will not have to do a block allocation so it doesn't create
a journal entry. For a read that creates a zero page to cover a hole
followed by a write that actually allocates storage this is incorrect. The
ext4_dax_mkwrite() -> __dax_mkwrite() -> __dax_fault() path calls
get_blocks() to allocate storage.
Fix this by having the ->page_mkwrite fault handler call ext4_dax_fault()
as this function already has all the logic needed to allocate a journal
entry and call __dax_fault().
Also update the ext2 fault handlers in this same way to remove duplicate
code and keep the logic between ext2 and ext4 the same.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Linus Torvalds [Sat, 27 Feb 2016 18:30:14 +0000 (10:30 -0800)]
Merge tag 'clk-fixes-for-linus' of git://git./linux/kernel/git/clk/linux
Pull clk fix from Stephen Boyd:
"One small fix to keep OMAP platforms working across a suspend/resume
cycle"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: ti: omap3+: dpll: use non-locking version of clk_get_rate
Ross Zwisler [Fri, 26 Feb 2016 23:19:55 +0000 (15:19 -0800)]
dax: move writeback calls into the filesystems
Previously calls to dax_writeback_mapping_range() for all DAX filesystems
(ext2, ext4 & xfs) were centralized in filemap_write_and_wait_range().
dax_writeback_mapping_range() needs a struct block_device, and it used
to get that from inode->i_sb->s_bdev. This is correct for normal inodes
mounted on ext2, ext4 and XFS filesystems, but is incorrect for DAX raw
block devices and for XFS real-time files.
Instead, call dax_writeback_mapping_range() directly from the filesystem
->writepages function so that it can supply us with a valid block
device. This also fixes DAX code to properly flush caches in response
to sync(2).
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ross Zwisler [Fri, 26 Feb 2016 23:19:52 +0000 (15:19 -0800)]
dax: give DAX clearing code correct bdev
dax_clear_blocks() needs a valid struct block_device and previously it
was using inode->i_sb->s_bdev in all cases. This is correct for normal
inodes on mounted ext2, ext4 and XFS filesystems, but is incorrect for
DAX raw block devices and for XFS real-time devices.
Instead, rename dax_clear_blocks() to dax_clear_sectors(), and change
its arguments to take a bdev and a sector instead of an inode and a
block. This better reflects what the function does, and it allows the
filesystem and raw block device code to pass in an appropriate struct
block_device.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ross Zwisler [Fri, 26 Feb 2016 23:19:49 +0000 (15:19 -0800)]
ext4: online defrag not supported with DAX
Online defrag operations for ext4 are hard coded to use the page cache.
See ext4_ioctl() -> ext4_move_extents() -> move_extent_per_page()
When combined with DAX I/O, which circumvents the page cache, this can
result in data corruption. This was observed with xfstests ext4/307 and
ext4/308.
Fix this by only allowing online defrag for non-DAX files.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ross Zwisler [Fri, 26 Feb 2016 23:19:46 +0000 (15:19 -0800)]
ext2, ext4: only set S_DAX for regular inodes
When S_DAX is set on an inode we assume that if there are pages attached
to the mapping (mapping->nrpages != 0), those pages are clean zero pages
that were used to service reads from holes. Any dirty data associated
with the inode should be in the form of DAX exceptional entries
(mapping->nrexceptional) that is written back via
dax_writeback_mapping_range().
With the current code, though, this isn't always true. For example,
ext2 and ext4 directory inodes can have S_DAX set, but have their dirty
data stored as dirty page cache entries. For these types of inodes,
having S_DAX set doesn't really make sense since their I/O doesn't
actually happen through the DAX code path.
Instead, only allow S_DAX to be set for regular inodes for ext2 and
ext4. This allows us to have strict DAX vs non-DAX paths in the
writeback code.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dan Williams [Fri, 26 Feb 2016 23:19:43 +0000 (15:19 -0800)] 
block: disable block device DAX by default
The recent *sync enabling discovered that we are inserting into the
block_device pagecache counter to the expectations of the dirty data
tracking for dax mappings. This can lead to data corruption.
We want to support DAX for block devices eventually, but it requires
wider changes to properly manage the pagecache.
dump_stack+0x85/0xc2
dax_writeback_mapping_range+0x60/0xe0
blkdev_writepages+0x3f/0x50
do_writepages+0x21/0x30
__filemap_fdatawrite_range+0xc6/0x100
filemap_write_and_wait+0x4a/0xa0
set_blocksize+0x70/0xd0
sb_set_blocksize+0x1d/0x50
ext4_fill_super+0x75b/0x3360
mount_bdev+0x180/0x1b0
ext4_mount+0x15/0x20
mount_fs+0x38/0x170
Mark the support broken so its disabled by default, but otherwise still
available for testing.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Suggested-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@fb.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Guozhonghua [Fri, 26 Feb 2016 23:19:40 +0000 (15:19 -0800)] 
ocfs2: unlock inode if deleting inode from orphan fails
When doing append direct io cleanup, if deleting inode fails, it goes
out without unlocking inode, which will cause the inode deadlock.
This issue was introduced by commit
cf1776a9e834 ("ocfs2: fix a tiny
race when truncate dio orohaned entry").
Signed-off-by: Guozhonghua <guozhonghua@h3c.com>
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Gang He <ghe@suse.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: <stable@vger.kernel.org> [4.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Daniel Cashman [Fri, 26 Feb 2016 23:19:37 +0000 (15:19 -0800)] 
mm: ASLR: use get_random_long()
Replace calls to get_random_int() followed by a cast to (unsigned long)
with calls to get_random_long(). Also address shifting bug which, in
case of x86 removed entropy mask for mmap_rnd_bits values > 31 bits.
Signed-off-by: Daniel Cashman <dcashman@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nick Kralevich <nnk@google.com>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Mark Salyzyn <salyzyn@android.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Daniel Cashman [Fri, 26 Feb 2016 23:19:34 +0000 (15:19 -0800)]
drivers: char: random: add get_random_long()
Commit
d07e22597d1d ("mm: mmap: add new /proc tunable for mmap_base
ASLR") added the ability to choose from a range of values to use for
entropy count in generating the random offset to the mmap_base address.
The maximum value on this range was set to 32 bits for 64-bit x86
systems, but this value could be increased further, requiring more than
the 32 bits of randomness provided by get_random_int(), as is already
possible for arm64. Add a new function: get_random_long() which more
naturally fits with the mmap usage of get_random_int() but operates
exactly the same as get_random_int().
Also, fix the shifting constant in mmap_rnd() to be an unsigned long so
that values greater than 31 bits generate an appropriate mask without
overflow. This is especially important on x86, as its shift instruction
uses a 5-bit mask for the shift operand, which meant that any value for
mmap_rnd_bits over 31 acts as a no-op and effectively disables mmap_base
randomization.
Finally, replace calls to get_random_int() with get_random_long() where
appropriate.
This patch (of 2):
Add get_random_long().
Signed-off-by: Daniel Cashman <dcashman@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nick Kralevich <nnk@google.com>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Mark Salyzyn <salyzyn@android.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mel Gorman [Fri, 26 Feb 2016 23:19:31 +0000 (15:19 -0800)] 
mm: numa: quickly fail allocations for NUMA balancing on full nodes
Commit
4167e9b2cf10 ("mm: remove GFP_THISNODE") removed the GFP_THISNODE
flag combination due to confusing semantics. It noted that
alloc_misplaced_dst_page() was one such user after changes made by
commit
e97ca8e5b864 ("mm: fix GFP_THISNODE callers and clarify").
Unfortunately when GFP_THISNODE was removed, users of
alloc_misplaced_dst_page() started waking kswapd and entering direct
reclaim because the wrong GFP flags are cleared. The consequence is
that workloads that used to fit into memory now get reclaimed which is
addressed by this patch.
The problem can be demonstrated with "mutilate" that exercises memcached
which is software dedicated to memory object caching. The configuration
uses 80% of memory and is run 3 times for varying numbers of clients.
The results on a 4-socket NUMA box are
mutilate
4.4.0 4.4.0
vanilla numaswap-v1
Hmean 1 8394.71 ( 0.00%) 8395.32 ( 0.01%)
Hmean 4 30024.62 ( 0.00%) 34513.54 ( 14.95%)
Hmean 7 32821.08 ( 0.00%) 70542.96 (114.93%)
Hmean 12 55229.67 ( 0.00%) 93866.34 ( 69.96%)
Hmean 21 39438.96 ( 0.00%) 85749.21 (117.42%)
Hmean 30 37796.10 ( 0.00%) 50231.49 ( 32.90%)
Hmean 47 18070.91 ( 0.00%) 38530.13 (113.22%)
The metric is queries/second with the more the better. The results are
way outside of the noise and the reason for the improvement is obvious
from some of the vmstats
4.4.0 4.4.0
vanillanumaswap-v1r1
Minor Faults
1929399272 2146148218
Major Faults
19746529 3567
Swap Ins
57307366 9913
Swap Outs
50623229 17094
Allocation stalls 35909 443
DMA allocs 0 0
DMA32 allocs
72976349 170567396
Normal allocs
5306640898 5310651252
Movable allocs 0 0
Direct pages scanned
404130893 799577
Kswapd pages scanned
160230174 0
Kswapd pages reclaimed
55928786 0
Direct pages reclaimed
1843936 41921
Page writes file 2391 0
Page writes anon
50623229 17094
The vanilla kernel is swapping like crazy with large amounts of direct
reclaim and kswapd activity. The figures are aggregate but it's known
that the bad activity is throughout the entire test.
Note that simple streaming anon/file memory consumers also see this
problem but it's not as obvious. In those cases, kswapd is awake when
it should not be.
As there are at least two reclaim-related bugs out there, it's worth
spelling out the user-visible impact. This patch only addresses bugs
related to excessive reclaim on NUMA hardware when the working set is
larger than a NUMA node. There is a bug related to high kswapd CPU
usage but the reports are against laptops and other UMA hardware and is
not addressed by this patch.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org> [4.1+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrea Arcangeli [Fri, 26 Feb 2016 23:19:28 +0000 (15:19 -0800)] 
mm: thp: fix SMP race condition between THP page fault and MADV_DONTNEED
pmd_trans_unstable()/pmd_none_or_trans_huge_or_clear_bad() were
introduced to locklessy (but atomically) detect when a pmd is a regular
(stable) pmd or when the pmd is unstable and can infinitely transition
from pmd_none() and pmd_trans_huge() from under us, while only holding
the mmap_sem for reading (for writing not).
While holding the mmap_sem only for reading, MADV_DONTNEED can run from
under us and so before we can assume the pmd to be a regular stable pmd
we need to compare it against pmd_none() and pmd_trans_huge() in an
atomic way, with pmd_trans_unstable(). The old pmd_trans_huge() left a
tiny window for a race.
Useful applications are unlikely to notice the difference as doing
MADV_DONTNEED concurrently with a page fault would lead to undefined
behavior.
[akpm@linux-foundation.org: tidy up comment grammar/layout]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Thierry Reding [Thu, 18 Feb 2016 13:32:10 +0000 (14:32 +0100)] 
PCI: mvebu: Restrict build to 32-bit ARM
This driver uses PCI glue that is only available on 32-bit ARM. This used
to work fine as long as ARCH_MVEBU and ARCH_DOVE were exclusively 32-bit,
but there's a patch in the pipe to make ARCH_MVEBU also available on 64-bit
ARM.
[bhelgaas: changelog; patch is coming but not merged yet]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Bjorn Helgaas [Wed, 17 Feb 2016 18:26:42 +0000 (12:26 -0600)] 
Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"
991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and
pcibios_free_irq()") appeared in v4.3 and helps support IOAPIC hotplug.
Олег reported that the Elcus-1553 TA1-PCI driver worked in v4.2 but not
v4.3 and bisected it to
991de2e59090. Sunjin reported that the RocketRAID
272x driver worked in v4.2 but not v4.3. In both cases booting with
"pci=routirq" is a workaround.
I think the problem is that after
991de2e59090, we no longer call
pcibios_enable_irq() for upstream bridges. Prior to
991de2e59090, when a
driver called pci_enable_device(), we recursively called
pcibios_enable_irq() for upstream bridges via pci_enable_bridge().
After
991de2e59090, we call pcibios_enable_irq() from pci_device_probe()
instead of the pci_enable_device() path, which does *not* call
pcibios_enable_irq() for upstream bridges.
Revert
991de2e59090 to fix these driver regressions.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Reported-and-tested-by: Олег Мороз <oleg.moroz@mcc.vniiem.ru>
Reported-by: Sunjin Yang <fan4326@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
Ingo Molnar [Sat, 27 Feb 2016 09:34:13 +0000 (10:34 +0100)]
Merge tag 'perf-core-for-mingo-
20160226' of git://git./linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
- Show extra line telling no entries below --percent-limit are
at that --hierarchy level (Namhyung Kim)
- 'perf report/top --hierarchy' assorted alignment fixes (Namhyung Kim)
- Handle empty print fmts in 'perf script -s' i.e. when running
python or perl scripts (Taeung Song)
- Improve support for bpf-output events in 'perf trace' (Wang Nan)
- Fix parsing of pmu events with empty list of modifiers, this
cures a perf/core-only regression where '-e intel_pt//' got
broken (Arnaldo Carvalho de Melo)
Infrastructure changes:
- Improve missing OpenJDK devel files error message in jvmti
Makefile (Stephane Eranian)
- Remove duplicated code and needless script_spec__findnew() (Taeung Song)
- Bring perf_default_config to the very beginning at main(), removing
the need for each subcommand to do this (Wang Nan)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Wang Nan [Fri, 26 Feb 2016 09:31:55 +0000 (09:31 +0000)]
perf trace: Print content of bpf-output event
With this patch the contend of BPF output event is printed by
'perf trace'. For example:
# ./perf trace -a --ev bpf-output/no-inherit,name=evt/ \
--ev ./test_bpf_trace.c/map:channel.event=evt/ \
usleep 100000
...
1.787 ( 0.004 ms): usleep/3832 nanosleep(rqtp: 0x7ffc78b18980 ) ...
1.787 ( ): evt:Raise a BPF event!..)
1.788 ( ): perf_bpf_probe:func_begin:(
ffffffff810e97d0))
...
101.866 (87.038 ms): gmain/1654 poll(ufds: 0x7f57a80008c0, nfds: 2, timeout_msecs: 1000 ) ...
101.866 ( ): evt:Raise a BPF event!..)
101.867 ( ): perf_bpf_probe:func_end:(
ffffffff810e97d0 <-
ffffffff81796173))
101.869 (100.087 ms): usleep/3832 ... [continued]: nanosleep()) = 0
...
(There is an extra ')' at the end of several lines. However, it is
another problem, unrelated to this commit.)
Where test_bpf_trace.c is:
/************************ BEGIN **************************/
#include <uapi/linux/bpf.h>
struct bpf_map_def {
unsigned int type;
unsigned int key_size;
unsigned int value_size;
unsigned int max_entries;
};
#define SEC(NAME) __attribute__((section(NAME), used))
static u64 (*ktime_get_ns)(void) =
(void *)BPF_FUNC_ktime_get_ns;
static int (*trace_printk)(const char *fmt, int fmt_size, ...) =
(void *)BPF_FUNC_trace_printk;
static int (*get_smp_processor_id)(void) =
(void *)BPF_FUNC_get_smp_processor_id;
static int (*perf_event_output)(void *, struct bpf_map_def *, int, void *, unsigned long) =
(void *)BPF_FUNC_perf_event_output;
struct bpf_map_def SEC("maps") channel = {
.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(u32),
.max_entries = __NR_CPUS__,
};
static inline int __attribute__((always_inline))
func(void *ctx, int type)
{
char output_str[] = "Raise a BPF event!";
char err_str[] = "BAD %d\n";
int err;
err = perf_event_output(ctx, &channel, get_smp_processor_id(),
&output_str, sizeof(output_str));
if (err)
trace_printk(err_str, sizeof(err_str), err);
return 1;
}
SEC("func_begin=sys_nanosleep")
int func_begin(void *ctx) {return func(ctx, 1);}
SEC("func_end=sys_nanosleep%return")
int func_end(void *ctx) { return func(ctx, 2);}
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
/************************* END ***************************/
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-8-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:31:54 +0000 (09:31 +0000)]
perf trace: Call bpf__apply_obj_config in 'perf trace'
Without this patch BPF map configuration is not applied.
Command like this:
# ./perf trace --ev bpf-output/no-inherit,name=evt/ \
--ev ./test_bpf_trace.c/map:channel.event=evt/ \
usleep 100000
Load BPF files without error, but since map:channel.event=evt is not
applied, bpf-output event not work.
This patch allows 'perf trace' load and run BPF scripts.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-7-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:31:53 +0000 (09:31 +0000)]
perf tools: Only set filter for tracepoints events
perf_evlist__set_filter() tries to set filter to every evsel linked in
the evlist. However, since filters can only be applied to tracepoints,
checking type of evsel before calling perf_evsel__set_filter() would be
better.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-6-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Fri, 26 Feb 2016 09:31:51 +0000 (09:31 +0000)]
perf config: Bring perf_default_config to the very beginning at main()
Before this patch each subcommand calls perf_config() by themself,
reading the default configuration together with subcommand specific
options. If a subcommand doesn't have it own options, it needs to call
'perf_config(perf_default_config, NULL)' to ensure .perfconfig is
loaded.
This patch brings perf_config(perf_default_config, NULL) to the very
start of main(), so subcommands don't need to do it.
After this patch, 'llvm.clang-path' works for 'perf trace'.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456479154-136027-4-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 18:52:47 +0000 (03:52 +0900)] 
perf report: Update column width of dynamic entries
The column width of dynamic entries is updated when comparing hist
entries. However some unique entries can miss the chance to update. So
move the update to output resort stage to make sure every entry will get
called before display.
To do that, abuse ->sort callback to update the width when the third
argument is NULL. When resorting entries in normal path, it never be
NULL so it should be fine IMHO.
Before:
# Overhead ptr / bytes_req / gfp_flags
# .............. ..........................................
#
37.50% 0xffff8803f7669400
37.50% 448
37.50% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
10.42% 0xffff8803f766be00
8.33% 96
8.33% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
2.08% 512
2.08% GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP <-- here
After:
# Overhead ptr / bytes_req / gfp_flags
# .............. .....................................................
#
37.50% 0xffff8803f7669400
37.50% 448
37.50% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
10.42% 0xffff8803f766be00
8.33% 96
8.33% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
2.08% 512
2.08% GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP_NOMEMALLOC
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 18:52:46 +0000 (03:52 +0900)]
perf hists: Fix dynamic entry display in hierarchy
When dynamic sort key is used it might not show pretty printed output.
This is because the trace output was not set only for the first dynamic
sort key. During hierarchy_insert_entry() it missed to pass the
trace_output to dynamic entries. Also even if it did, only first entry
will have it. Subsequent entries might set it during collapsing stage
but it's not guaranteed.
Before:
$ perf report --hierarchy --stdio -s ptr,bytes_req,gfp_flags -g none
#
# Overhead ptr / bytes_req / gfp_flags
# .............. ..........................................
#
37.50% 0xffff8803f7669400
37.50% 448
37.50% 66080
10.42% 0xffff8803f766be00
8.33% 96
8.33% 66080
2.08% 512
2.08% 67280
After:
#
# Overhead ptr / bytes_req / gfp_flags
# .............. ..........................................
#
37.50% 0xffff8803f7669400
37.50% 448
37.50% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
10.42% 0xffff8803f766be00
8.33% 96
8.33% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
2.08% 512
2.08% GFP_KERNEL|GFP_NOWARN|GFP_REPEAT|GFP
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 18:52:45 +0000 (03:52 +0900)]
perf report: Left align dynamic entries in hierarchy
The dynamic entries are right-aligned unlike other entries since it
usually has numeric value. But for the hierarchy mode, left alignment
is more appropriate IMHO. Also trim spaces on the left so that we can
easily identify the hierarchy.
Before:
$ perf report --hierarchy -i perf.data.kmem -s gfp_flags,ptr,bytes_req --stdio -g none
...
#
# Overhead gfp_flags / ptr / bytes_req
# .............. .................................................................................................
#
91.67% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
37.50% 0xffff8803f7669400
37.50% 448
8.33% 0xffff8803f766be00
8.33% 96
4.17% 0xffff8800d156dc00
4.17% 704
After:
# Overhead gfp_flags / ptr / bytes_req
# .............. ....................................
#
91.67% GFP_ATOMIC|GFP_NOWARN|GFP_NOMEMALLOC
37.50% 0xffff8803f7669400
37.50% 448
8.33% 0xffff8803f766be00
8.33% 96
4.17% 0xffff8800d156dc00
4.17% 704
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 18:52:44 +0000 (03:52 +0900)]
perf report: Fix indentation of dynamic entries in hierarchy
When dynamic entries are used in the hierarchy mode with multiple
events, the output might not be aligned properly. In the hierarchy
mode, the each sort column is indented using total number of sort keys.
So it keeps track of number of sort keys when adding them. However
a dynamic sort key can be added more than once when multiple events have
same field names. This results in unnecessarily long indentation in the
output.
For example perf kmem records following events:
$ perf evlist --trace-fields -i perf.data.kmem
kmem:kmalloc: trace_fields: call_site,ptr,bytes_req,bytes_alloc,gfp_flags
kmem:kmalloc_node: trace_fields: call_site,ptr,bytes_req,bytes_alloc,gfp_flags,node
kmem:kfree: trace_fields: call_site,ptr
kmem:kmem_cache_alloc: trace_fields: call_site,ptr,bytes_req,bytes_alloc,gfp_flags
kmem:kmem_cache_alloc_node: trace_fields: call_site,ptr,bytes_req,bytes_alloc,gfp_flags,node
kmem:kmem_cache_free: trace_fields: call_site,ptr
kmem:mm_page_alloc: trace_fields: page,order,gfp_flags,migratetype
kmem:mm_page_free: trace_fields: page,order
As you can see, many field names shared between kmem events. So adding
'ptr' dynamic sort key alone will set nr_sort_keys to 6. And this adds
many unnecessary spaces between columns.
Before:
$ perf report -i perf.data.kmem --hierarchy -s ptr -g none --stdio
...
# Overhead ptr
# ....................... ...................................
#
99.89% 0xffff8803ffb79720
0.06% 0xffff8803d228a000
0.03% 0xffff8803f7678f00
0.00% 0xffff880401dc5280
0.00% 0xffff880406172380
0.00% 0xffff8803ffac3a00
0.00% 0xffff8803ffac1600
After:
# Overhead ptr
# ........ ....................
#
99.89% 0xffff8803ffb79720
0.06% 0xffff8803d228a000
0.03% 0xffff8803f7678f00
0.00% 0xffff880401dc5280
0.00% 0xffff880406172380
0.00% 0xffff8803ffac3a00
0.00% 0xffff8803ffac1600
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 18:52:43 +0000 (03:52 +0900)]
perf hists: Fix comparing of dynamic entries
When hist_entry__cmp() and hist_entry__collapse() are called, they
should check if the dynamic entry is comparing matching hists only.
Otherwise it might access different hists resulting in incorrect output.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456512767-1164-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Colin Ian King [Fri, 26 Feb 2016 18:55:31 +0000 (18:55 +0000)]
x86/mpx: Fix off-by-one comparison with nr_registers
In the unlikely event that regno == nr_registers then we get an array
overrun on regoff because the invalid register check is currently
off-by-one. Fix this with a check that regno is >= nr_registers instead.
Detected with static analysis using CoverityScan.
Fixes: fcc7ffd67991 "x86, mpx: Decode MPX instruction to get bound violation information"
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1456512931-3388-1-git-send-email-colin.king@canonical.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds [Fri, 26 Feb 2016 17:35:03 +0000 (09:35 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client
Pull Ceph fixes from Sage Weil:
"There are two small messenger bug fixes and a log spam regression fix"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
libceph: don't spam dmesg with stray reply warnings
libceph: use the right footer size when skipping a message
libceph: don't bail early from try_read() when skipping a message
Linus Torvalds [Fri, 26 Feb 2016 17:27:21 +0000 (09:27 -0800)]
Merge tag 'sound-4.5-rc6' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Things got calmed down for rc6, as it seems, and we have only a few
HD-audio fixes at this time: a fix for Skylake codec probe errors, a
fix for missing interrupt handling, and a few Dell and HP quirks"
* tag 'sound-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Loop interrupt handling until really cleared
ALSA: hda - Fix headset support and noise on HP EliteBook 755 G2
ALSA: hda - Fixup speaker pass-through control for nid 0x14 on ALC225
ALSA: hda - Fixing background noise on Dell Inspiron 3162
ALSA: hda - Apply clock gate workaround to Skylake, too
Linus Torvalds [Fri, 26 Feb 2016 17:21:48 +0000 (09:21 -0800)]
Merge tag 'pm+acpi-4.5-rc6' of git://git./linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are two reverts of recent PCI-related ACPI core changes (one of
which caused some systems to crash on boot and the other was a cleanup
on top of it) and a devfreq fix for Tegra.
Specifics:
- Revert an ACPI core change related to IRQ management in PCI that
introduced code relying on the use of kmalloc() which turned out to
also run during early init when that's not available yet and caused
some systems to crash on boot for this reason along with a cleanup
on top of it (Rafael Wysocki).
- Prevent devfreq from flooding the kernel log with useless messages
on Tegra (which started to happen after some recent changes in the
devfreq core) by fixing the driver to follow the documentation and
the core's expectations in its ->target callback (Tomeu Vizoso)"
* tag 'pm+acpi-4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPI, PCI, irq: remove interrupt count restriction"
Revert "ACPI / PCI: Simplify acpi_penalize_isa_irq()"
PM / devfreq: tegra: Set freq in rate callback
Namhyung Kim [Fri, 26 Feb 2016 12:13:20 +0000 (21:13 +0900)]
perf report: Show message for percent limit on gtk
Like the stdio, it should show messages about omitted hierarchy
entries. Please refer the previous commit for more details.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456488800-28124-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 12:13:19 +0000 (21:13 +0900)]
perf hists browser: Show message for percent limit
Like the stdio, it should show messages about omitted hierarchy entries.
Please refer the previous commit for more details.
As it needs to check an entry is omitted or not multiple times, add the
has_no_entry field in the hist entry.
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456488800-28124-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 12:13:18 +0000 (21:13 +0900)]
perf hists browser: Cleanup hist_browser__update_percent_limit()
The previous patch introduced __rb_hierarchy_next() function with
various move direction like HMD_FORCE_CHILD but missed to change using
it some place.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456488800-28124-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Fri, 26 Feb 2016 12:13:17 +0000 (21:13 +0900)]
perf report: Show message for percent limit on stdio
When the hierarchy mode is used, some entries might be omiited due to a
percent limit or filter. In this case the output hierarchy is different
than other entries. Add an informative message to users about this.
For example, when 4% of percent limit is applied:
Before:
# Overhead Command / Shared Object / Symbol
# .............. ..........................................
#
49.09% swapper
48.67% [kernel.vmlinux]
34.42% [k] intel_idle
11.51% firefox
8.87% libpthread-2.22.so
6.60% [.] __GI___libc_recvmsg
10.49% gnome-shell
4.74% libc-2.22.so
10.08% Xorg
6.11% libc-2.22.so
5.27% [.] __memcpy_sse2_unaligned
6.15% perf
Note that, gnome-shell/libc has no symbols and perf has no dso/symbols.
With that patch the output will look like below:
After:
# Overhead Command / Shared Object / Symbol
# .............. ..........................................
#
49.09% swapper
48.67% [kernel.vmlinux]
34.42% [k] intel_idle
11.51% firefox
8.87% libpthread-2.22.so
6.60% [.] __GI___libc_recvmsg
10.49% gnome-shell
4.74% libc-2.22.so
no entry >= 4.00%
10.08% Xorg
6.11% libc-2.22.so
5.27% [.] __memcpy_sse2_unaligned
6.15% perf
no entry >= 4.00%
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456488800-28124-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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