Merge branch 'perf/urgent' into perf/core

[deliverable/linux.git] / tools / perf / builtin-record.c

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 6e4a39328b3363367ca930d123804599172409ef..bed175d59e55383d92c05173758f33a7c406a73a 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -22,6 +22,7 @@
 #include "util/debug.h"
 #include "util/session.h"
 #include "util/symbol.h"
+#include "util/cpumap.h"
 
 #include <unistd.h>
 #include <sched.h>
@@ -244,6 +245,9 @@ static void create_counter(int counter, int cpu, pid_t pid)
 
        attr->sample_type       |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
 
+       if (nr_counters > 1)
+               attr->sample_type |= PERF_SAMPLE_ID;
+
        if (freq) {
                attr->sample_type       |= PERF_SAMPLE_PERIOD;
                attr->freq              = 1;
@@ -392,6 +396,9 @@ static int process_buildids(void)
 {
        u64 size = lseek(output, 0, SEEK_CUR);
 
+       if (size == 0)
+               return 0;
+
        session->fd = output;
        return __perf_session__process_events(session, post_processing_offset,
                                              size - post_processing_offset,
@@ -419,9 +426,6 @@ static int __cmd_record(int argc, const char **argv)
        char buf;
 
        page_size = sysconf(_SC_PAGE_SIZE);
-       nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
-       assert(nr_cpus <= MAX_NR_CPUS);
-       assert(nr_cpus >= 0);
 
        atexit(sig_atexit);
        signal(SIGCHLD, sig_handler);
@@ -545,8 +549,9 @@ static int __cmd_record(int argc, const char **argv)
        if ((!system_wide && !inherit) || profile_cpu != -1) {
                open_counters(profile_cpu, target_pid);
        } else {
+               nr_cpus = read_cpu_map();
                for (i = 0; i < nr_cpus; i++)
-                       open_counters(i, target_pid);
+                       open_counters(cpumap[i], target_pid);
        }
 
        if (file_new) {