-#include "util/util.h"
+/*
+ * builtin-report.c
+ *
+ * Builtin report command: Analyze the perf.data input file,
+ * look up and read DSOs and symbol information and display
+ * a histogram of results, along various sorting keys.
+ */
#include "builtin.h"
+#include "util/util.h"
+
#include "util/list.h"
#include "util/cache.h"
#include "util/rbtree.h"
#include "util/symbol.h"
+#include "util/string.h"
#include "perf.h"
static char const *input_name = "perf.data";
static char *vmlinux = NULL;
-static char *sort_order = "pid,symbol";
+
+static char default_sort_order[] = "comm,dso";
+static char *sort_order = default_sort_order;
+
static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
static int dump_trace = 0;
+#define dprintf(x...) do { if (dump_trace) printf(x); } while (0)
+
static int verbose;
+static int full_paths;
static unsigned long page_size;
static unsigned long mmap_window = 32;
__u64 ip;
__u32 pid, tid;
};
+
struct mmap_event {
struct perf_event_header header;
__u32 pid, tid;
__u64 pgoff;
char filename[PATH_MAX];
};
+
struct comm_event {
struct perf_event_header header;
- __u32 pid,tid;
+ __u32 pid, tid;
char comm[16];
};
struct dso *dso = dsos__find(name);
int nr;
- if (dso == NULL) {
- dso = dso__new(name, 0);
- if (!dso)
- goto out_delete_dso;
+ if (dso)
+ return dso;
- nr = dso__load(dso, NULL);
- if (nr < 0) {
- fprintf(stderr, "Failed to open: %s\n", name);
- goto out_delete_dso;
- }
- if (!nr) {
- fprintf(stderr,
- "Failed to find debug symbols for: %s, maybe install a debug package?\n",
- name);
- }
+ dso = dso__new(name, 0);
+ if (!dso)
+ goto out_delete_dso;
- dsos__add(dso);
+ nr = dso__load(dso, NULL, verbose);
+ if (nr < 0) {
+ if (verbose)
+ fprintf(stderr, "Failed to open: %s\n", name);
+ goto out_delete_dso;
}
+ if (!nr && verbose) {
+ fprintf(stderr,
+ "No symbols found in: %s, maybe install a debug package?\n",
+ name);
+ }
+
+ dsos__add(dso);
return dso;
if (!kernel_dso)
return -1;
- err = dso__load_kernel(kernel_dso, vmlinux, NULL);
+ err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
if (err) {
dso__delete(kernel_dso);
kernel_dso = NULL;
return err;
}
+static char __cwd[PATH_MAX];
+static char *cwd = __cwd;
+static int cwdlen;
+
+static int strcommon(const char *pathname)
+{
+ int n = 0;
+
+ while (pathname[n] == cwd[n] && n < cwdlen)
+ ++n;
+
+ return n;
+}
+
struct map {
struct list_head node;
uint64_t start;
struct map *self = malloc(sizeof(*self));
if (self != NULL) {
+ const char *filename = event->filename;
+ char newfilename[PATH_MAX];
+
+ if (cwd) {
+ int n = strcommon(filename);
+
+ if (n == cwdlen) {
+ snprintf(newfilename, sizeof(newfilename),
+ ".%s", filename + n);
+ filename = newfilename;
+ }
+ }
+
self->start = event->start;
self->end = event->start + event->len;
self->pgoff = event->pgoff;
- self->dso = dsos__findnew(event->filename);
+ self->dso = dsos__findnew(filename);
if (self->dso == NULL)
goto out_delete;
}
if (self != NULL) {
self->pid = pid;
- self->comm = NULL;
+ self->comm = malloc(32);
+ if (self->comm)
+ snprintf(self->comm, 32, ":%d", self->pid);
INIT_LIST_HEAD(&self->maps);
}
static int thread__set_comm(struct thread *self, const char *comm)
{
+ if (self->comm)
+ free(self->comm);
self->comm = strdup(comm);
return self->comm ? 0 : -ENOMEM;
}
static struct rb_root threads;
+static struct thread *last_match;
static struct thread *threads__findnew(pid_t pid)
{
struct rb_node *parent = NULL;
struct thread *th;
+ /*
+ * Font-end cache - PID lookups come in blocks,
+ * so most of the time we dont have to look up
+ * the full rbtree:
+ */
+ if (last_match && last_match->pid == pid)
+ return last_match;
+
while (*p != NULL) {
parent = *p;
th = rb_entry(parent, struct thread, rb_node);
- if (th->pid == pid)
+ if (th->pid == pid) {
+ last_match = th;
return th;
+ }
if (pid < th->pid)
p = &(*p)->rb_left;
if (th != NULL) {
rb_link_node(&th->rb_node, parent, p);
rb_insert_color(&th->rb_node, &threads);
+ last_match = th;
}
+
return th;
}
char *header;
int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
+ int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
size_t (*print)(FILE *fp, struct hist_entry *);
};
+/* --sort pid */
+
static int64_t
sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
{
static size_t
sort__thread_print(FILE *fp, struct hist_entry *self)
{
- return fprintf(fp, " %16s:%5d", self->thread->comm ?: "", self->thread->pid);
+ return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
}
static struct sort_entry sort_thread = {
- .header = " Command: Pid ",
+ .header = " Command: Pid",
.cmp = sort__thread_cmp,
.print = sort__thread_print,
};
+/* --sort comm */
+
static int64_t
sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return right->thread->pid - left->thread->pid;
+}
+
+static int64_t
+sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
{
char *comm_l = left->thread->comm;
char *comm_r = right->thread->comm;
static size_t
sort__comm_print(FILE *fp, struct hist_entry *self)
{
- return fprintf(fp, " %16s", self->thread->comm ?: "<unknown>");
+ return fprintf(fp, "%16s", self->thread->comm);
}
static struct sort_entry sort_comm = {
- .header = " Command",
- .cmp = sort__comm_cmp,
- .print = sort__comm_print,
+ .header = " Command",
+ .cmp = sort__comm_cmp,
+ .collapse = sort__comm_collapse,
+ .print = sort__comm_print,
};
+/* --sort dso */
+
static int64_t
sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
{
static size_t
sort__dso_print(FILE *fp, struct hist_entry *self)
{
- return fprintf(fp, " %64s", self->dso ? self->dso->name : "<unknown>");
+ if (self->dso)
+ return fprintf(fp, "%-25s", self->dso->name);
+
+ return fprintf(fp, "%016llx ", (__u64)self->ip);
}
static struct sort_entry sort_dso = {
- .header = " Shared Object",
+ .header = "Shared Object ",
.cmp = sort__dso_cmp,
.print = sort__dso_print,
};
+/* --sort symbol */
+
static int64_t
sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
{
size_t ret = 0;
if (verbose)
- ret += fprintf(fp, " %#018llx", (unsigned long long)self->ip);
+ ret += fprintf(fp, "%#018llx ", (__u64)self->ip);
- ret += fprintf(fp, " %s: %s",
- self->dso ? self->dso->name : "<unknown>",
- self->sym ? self->sym->name : "<unknown>");
+ if (self->sym)
+ ret += fprintf(fp, "%s", self->sym->name);
+ else
+ ret += fprintf(fp, "%#016llx", (__u64)self->ip);
return ret;
}
static struct sort_entry sort_sym = {
- .header = "Shared Object: Symbol",
+ .header = "Symbol",
.cmp = sort__sym_cmp,
.print = sort__sym_print,
};
+static int sort__need_collapse = 0;
+
struct sort_dimension {
char *name;
struct sort_entry *entry;
if (sd->taken)
continue;
- if (strcmp(tok, sd->name))
+ if (strncasecmp(tok, sd->name, strlen(tok)))
continue;
+ if (sd->entry->collapse)
+ sort__need_collapse = 1;
+
list_add_tail(&sd->entry->list, &hist_entry__sort_list);
sd->taken = 1;
+
return 0;
}
return -ESRCH;
}
-static void setup_sorting(void)
+static int64_t
+hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
{
- char *tmp, *tok, *str = strdup(sort_order);
+ struct sort_entry *se;
+ int64_t cmp = 0;
- for (tok = strtok_r(str, ", ", &tmp);
- tok; tok = strtok_r(NULL, ", ", &tmp))
- sort_dimension__add(tok);
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ cmp = se->cmp(left, right);
+ if (cmp)
+ break;
+ }
- free(str);
+ return cmp;
}
static int64_t
-hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
+hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
{
struct sort_entry *se;
int64_t cmp = 0;
list_for_each_entry(se, &hist_entry__sort_list, list) {
- cmp = se->cmp(left, right);
+ int64_t (*f)(struct hist_entry *, struct hist_entry *);
+
+ f = se->collapse ?: se->cmp;
+
+ cmp = f(left, right);
if (cmp)
break;
}
size_t ret;
if (total_samples) {
- ret = fprintf(fp, " %5.2f%%",
+ ret = fprintf(fp, " %6.2f%%",
(self->count * 100.0) / total_samples);
} else
ret = fprintf(fp, "%12d ", self->count);
- list_for_each_entry(se, &hist_entry__sort_list, list)
+ list_for_each_entry(se, &hist_entry__sort_list, list) {
+ fprintf(fp, " ");
ret += se->print(fp, self);
+ }
ret += fprintf(fp, "\n");
return 0;
}
+static void hist_entry__free(struct hist_entry *he)
+{
+ free(he);
+}
+
+/*
+ * collapse the histogram
+ */
+
+static struct rb_root collapse_hists;
+
+static void collapse__insert_entry(struct hist_entry *he)
+{
+ struct rb_node **p = &collapse_hists.rb_node;
+ struct rb_node *parent = NULL;
+ struct hist_entry *iter;
+ int64_t cmp;
+
+ while (*p != NULL) {
+ parent = *p;
+ iter = rb_entry(parent, struct hist_entry, rb_node);
+
+ cmp = hist_entry__collapse(iter, he);
+
+ if (!cmp) {
+ iter->count += he->count;
+ hist_entry__free(he);
+ return;
+ }
+
+ if (cmp < 0)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&he->rb_node, parent, p);
+ rb_insert_color(&he->rb_node, &collapse_hists);
+}
+
+static void collapse__resort(void)
+{
+ struct rb_node *next;
+ struct hist_entry *n;
+
+ if (!sort__need_collapse)
+ return;
+
+ next = rb_first(&hist);
+ while (next) {
+ n = rb_entry(next, struct hist_entry, rb_node);
+ next = rb_next(&n->rb_node);
+
+ rb_erase(&n->rb_node, &hist);
+ collapse__insert_entry(n);
+ }
+}
+
/*
* reverse the map, sort on count.
*/
static void output__resort(void)
{
- struct rb_node *next = rb_first(&hist);
+ struct rb_node *next;
struct hist_entry *n;
+ struct rb_root *tree = &hist;
+
+ if (sort__need_collapse)
+ tree = &collapse_hists;
+
+ next = rb_first(tree);
while (next) {
n = rb_entry(next, struct hist_entry, rb_node);
next = rb_next(&n->rb_node);
- rb_erase(&n->rb_node, &hist);
+ rb_erase(&n->rb_node, tree);
output__insert_entry(n);
}
}
struct rb_node *nd;
size_t ret = 0;
+ fprintf(fp, "\n");
+ fprintf(fp, "#\n");
+ fprintf(fp, "# (%Ld profiler events)\n", (__u64)total_samples);
fprintf(fp, "#\n");
fprintf(fp, "# Overhead");
list_for_each_entry(se, &hist_entry__sort_list, list)
- fprintf(fp, " %s", se->header);
+ fprintf(fp, " %s", se->header);
fprintf(fp, "\n");
fprintf(fp, "# ........");
list_for_each_entry(se, &hist_entry__sort_list, list) {
int i;
- fprintf(fp, " ");
+ fprintf(fp, " ");
for (i = 0; i < strlen(se->header); i++)
fprintf(fp, ".");
}
ret += hist_entry__fprintf(fp, pos, total_samples);
}
+ if (!strcmp(sort_order, default_sort_order)) {
+ fprintf(fp, "#\n");
+ fprintf(fp, "# (For more details, try: perf report --sort comm,dso,symbol)\n");
+ fprintf(fp, "#\n");
+ }
+ fprintf(fp, "\n");
+
return ret;
}
+static void register_idle_thread(void)
+{
+ struct thread *thread = threads__findnew(0);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, "[idle]")) {
+ fprintf(stderr, "problem inserting idle task.\n");
+ exit(-1);
+ }
+}
+
+static unsigned long total = 0, total_mmap = 0, total_comm = 0, total_unknown = 0;
+
+static int
+process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ char level;
+ int show = 0;
+ struct dso *dso = NULL;
+ struct thread *thread = threads__findnew(event->ip.pid);
+ uint64_t ip = event->ip.ip;
+ struct map *map = NULL;
+
+ dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.misc,
+ event->ip.pid,
+ (void *)(long)ip);
+
+ dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+
+ if (thread == NULL) {
+ fprintf(stderr, "problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
+ show = SHOW_KERNEL;
+ level = 'k';
+
+ dso = kernel_dso;
+
+ dprintf(" ...... dso: %s\n", dso->name);
+
+ } else if (event->header.misc & PERF_EVENT_MISC_USER) {
+
+ show = SHOW_USER;
+ level = '.';
+
+ map = thread__find_map(thread, ip);
+ if (map != NULL) {
+ dso = map->dso;
+ ip -= map->start + map->pgoff;
+ } else {
+ /*
+ * If this is outside of all known maps,
+ * and is a negative address, try to look it
+ * up in the kernel dso, as it might be a
+ * vsyscall (which executes in user-mode):
+ */
+ if ((long long)ip < 0)
+ dso = kernel_dso;
+ }
+ dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
+
+ } else {
+ show = SHOW_HV;
+ level = 'H';
+ dprintf(" ...... dso: [hypervisor]\n");
+ }
+
+ if (show & show_mask) {
+ struct symbol *sym = dso__find_symbol(dso, ip);
+
+ if (hist_entry__add(thread, map, dso, sym, ip, level)) {
+ fprintf(stderr,
+ "problem incrementing symbol count, skipping event\n");
+ return -1;
+ }
+ }
+ total++;
+
+ return 0;
+}
+
+static int
+process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->mmap.pid);
+ struct map *map = map__new(&event->mmap);
+
+ dprintf("%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ (void *)(long)event->mmap.start,
+ (void *)(long)event->mmap.len,
+ (void *)(long)event->mmap.pgoff,
+ event->mmap.filename);
+
+ if (thread == NULL || map == NULL) {
+ dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
+ return 0;
+ }
+
+ thread__insert_map(thread, map);
+ total_mmap++;
+
+ return 0;
+}
+
+static int
+process_comm_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ struct thread *thread = threads__findnew(event->comm.pid);
+
+ dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->comm.comm, event->comm.pid);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, event->comm.comm)) {
+ dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
+ return -1;
+ }
+ total_comm++;
+
+ return 0;
+}
+
+static int
+process_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
+ return process_overflow_event(event, offset, head);
+
+ switch (event->header.type) {
+ case PERF_EVENT_MMAP:
+ return process_mmap_event(event, offset, head);
+
+ case PERF_EVENT_COMM:
+ return process_comm_event(event, offset, head);
+
+ /*
+ * We dont process them right now but they are fine:
+ */
+ case PERF_EVENT_MUNMAP:
+ case PERF_EVENT_PERIOD:
+ case PERF_EVENT_THROTTLE:
+ case PERF_EVENT_UNTHROTTLE:
+ return 0;
+
+ default:
+ return -1;
+ }
+
+ return 0;
+}
static int __cmd_report(void)
{
+ int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head = 0;
struct stat stat;
- char *buf;
event_t *event;
- int ret, rc = EXIT_FAILURE;
uint32_t size;
- unsigned long total = 0, total_mmap = 0, total_comm = 0, total_unknown = 0;
+ char *buf;
+
+ register_idle_thread();
input = open(input_name, O_RDONLY);
if (input < 0) {
return EXIT_FAILURE;
}
+ if (!full_paths) {
+ if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
+ perror("failed to get the current directory");
+ return EXIT_FAILURE;
+ }
+ cwdlen = strlen(cwd);
+ } else {
+ cwd = NULL;
+ cwdlen = 0;
+ }
remap:
buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
MAP_SHARED, input, offset);
}
size = event->header.size;
- if (!size)
- goto broken_event;
-
- if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) {
- char level;
- int show = 0;
- struct dso *dso = NULL;
- struct thread *thread = threads__findnew(event->ip.pid);
- uint64_t ip = event->ip.ip;
- struct map *map = NULL;
-
- if (dump_trace) {
- fprintf(stderr, "%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->header.misc,
- event->ip.pid,
- (void *)(long)ip);
- }
- if (thread == NULL) {
- fprintf(stderr, "problem processing %d event, skipping it.\n",
- event->header.type);
- goto broken_event;
- }
-
- if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
- show = SHOW_KERNEL;
- level = 'k';
-
- dso = kernel_dso;
+ if (!size || process_event(event, offset, head) < 0) {
- } else if (event->header.misc & PERF_EVENT_MISC_USER) {
-
- show = SHOW_USER;
- level = '.';
-
- map = thread__find_map(thread, ip);
- if (map != NULL) {
- dso = map->dso;
- ip -= map->start + map->pgoff;
- }
-
- } else {
- show = SHOW_HV;
- level = 'H';
- }
-
- if (show & show_mask) {
- struct symbol *sym = dso__find_symbol(dso, ip);
-
- if (hist_entry__add(thread, map, dso, sym, ip, level)) {
- fprintf(stderr,
- "problem incrementing symbol count, skipping event\n");
- goto broken_event;
- }
- }
- total++;
- } else switch (event->header.type) {
- case PERF_EVENT_MMAP: {
- struct thread *thread = threads__findnew(event->mmap.pid);
- struct map *map = map__new(&event->mmap);
-
- if (dump_trace) {
- fprintf(stderr, "%p [%p]: PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- (void *)(long)event->mmap.start,
- (void *)(long)event->mmap.len,
- (void *)(long)event->mmap.pgoff,
- event->mmap.filename);
- }
- if (thread == NULL || map == NULL) {
- fprintf(stderr, "problem processing PERF_EVENT_MMAP, skipping event.\n");
- goto broken_event;
- }
- thread__insert_map(thread, map);
- total_mmap++;
- break;
- }
- case PERF_EVENT_COMM: {
- struct thread *thread = threads__findnew(event->comm.pid);
-
- if (dump_trace) {
- fprintf(stderr, "%p [%p]: PERF_EVENT_COMM: %s:%d\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->comm.comm, event->comm.pid);
- }
- if (thread == NULL ||
- thread__set_comm(thread, event->comm.comm)) {
- fprintf(stderr, "problem processing PERF_EVENT_COMM, skipping event.\n");
- goto broken_event;
- }
- total_comm++;
- break;
- }
- default: {
-broken_event:
- if (dump_trace)
- fprintf(stderr, "%p [%p]: skipping unknown header type: %d\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->header.type);
+ dprintf("%p [%p]: skipping unknown header type: %d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.type);
total_unknown++;
size = 8;
}
- }
head += size;
rc = EXIT_SUCCESS;
close(input);
- if (dump_trace) {
- fprintf(stderr, " IP events: %10ld\n", total);
- fprintf(stderr, " mmap events: %10ld\n", total_mmap);
- fprintf(stderr, " comm events: %10ld\n", total_comm);
- fprintf(stderr, " unknown events: %10ld\n", total_unknown);
+ dprintf(" IP events: %10ld\n", total);
+ dprintf(" mmap events: %10ld\n", total_mmap);
+ dprintf(" comm events: %10ld\n", total_comm);
+ dprintf(" unknown events: %10ld\n", total_unknown);
+ if (dump_trace)
return 0;
- }
if (verbose >= 2)
dsos__fprintf(stdout);
+ collapse__resort();
output__resort();
output__fprintf(stdout, total);
OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
"sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"),
+ OPT_BOOLEAN('P', "full-paths", &full_paths,
+ "Don't shorten the pathnames taking into account the cwd"),
OPT_END()
};
+static void setup_sorting(void)
+{
+ char *tmp, *tok, *str = strdup(sort_order);
+
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ if (sort_dimension__add(tok) < 0) {
+ error("Unknown --sort key: `%s'", tok);
+ usage_with_options(report_usage, options);
+ }
+ }
+
+ free(str);
+}
+
int cmd_report(int argc, const char **argv, const char *prefix)
{
symbol__init();
projects / deliverable / linux.git / blobdiff