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authorIngo Molnar <mingo@elte.hu>2009-09-02 14:20:38 -0400
committerIngo Molnar <mingo@elte.hu>2009-09-02 15:28:50 -0400
commitcd6feeeafddbef6abfe4d90fb26e42fd844d34ed (patch)
tree382a1afe242e7b8e8e7691a03e9ab39016c5c24b /tools/perf
parent65014ab36196f6d86edc9ee23759d6930b9d89a8 (diff)
perf trace: Sample the CPU too
Sample, record, parse and print the CPU field - it had all zeroes before. Before (watch the second column, the CPU values): perf-32685 [000] 0.000000: sched_wakeup_new: task perf:32686 [120] success=1 [011] perf-32685 [000] 0.000000: sched_migrate_task: task perf:32685 [120] from: 1 to: 11 perf-32685 [000] 0.000000: sched_process_fork: parent perf:32685 child perf:32686 true-32686 [000] 0.000000: sched_wakeup: task migration/11:25 [0] success=1 [011] true-32686 [000] 0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015] true-32686 [000] 0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015] perf-32685 [000] 0.000000: sched_switch: task perf:32685 [120] (S) ==> swapper:0 [140] true-32686 [000] 0.000000: sched_switch: task perf:32686 [120] (R) ==> migration/11:25 [0] true-32686 [000] 0.000000: sched_switch: task perf:32686 [120] (R) ==> distccd:12793 [125] true-32686 [000] 0.000000: sched_switch: task true:32686 [120] (R) ==> distccd:12793 [125] true-32686 [000] 0.000000: sched_process_exit: task true:32686 [120] true-32686 [000] 0.000000: sched_stat_wait: task: distccd:12793 wait: 6767985949080 [ns] true-32686 [000] 0.000000: sched_stat_wait: task: distccd:12793 wait: 6767986139446 [ns] true-32686 [000] 0.000000: sched_stat_sleep: task: distccd:12793 sleep: 132844 [ns] true-32686 [000] 0.000000: sched_stat_sleep: task: distccd:12793 sleep: 131724 [ns] After: perf-32685 [001] 0.000000: sched_wakeup_new: task perf:32686 [120] success=1 [011] perf-32685 [001] 0.000000: sched_migrate_task: task perf:32685 [120] from: 1 to: 11 perf-32685 [001] 0.000000: sched_process_fork: parent perf:32685 child perf:32686 true-32686 [011] 0.000000: sched_wakeup: task migration/11:25 [0] success=1 [011] true-32686 [015] 0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015] true-32686 [015] 0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015] perf-32685 [001] 0.000000: sched_switch: task perf:32685 [120] (S) ==> swapper:0 [140] true-32686 [011] 0.000000: sched_switch: task perf:32686 [120] (R) ==> migration/11:25 [0] true-32686 [015] 0.000000: sched_switch: task perf:32686 [120] (R) ==> distccd:12793 [125] true-32686 [015] 0.000000: sched_switch: task true:32686 [120] (R) ==> distccd:12793 [125] true-32686 [015] 0.000000: sched_process_exit: task true:32686 [120] true-32686 [015] 0.000000: sched_stat_wait: task: distccd:12793 wait: 6767985949080 [ns] true-32686 [015] 0.000000: sched_stat_wait: task: distccd:12793 wait: 6767986139446 [ns] true-32686 [015] 0.000000: sched_stat_sleep: task: distccd:12793 sleep: 132844 [ns] true-32686 [015] 0.000000: sched_stat_sleep: task: distccd:12793 sleep: 131724 [ns] So we can now see how this workload migrated between CPUs. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/builtin-record.c4
-rw-r--r--tools/perf/builtin-trace.c9
2 files changed, 11 insertions, 2 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index add514d53d2e..ff93f8ecba28 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -403,8 +403,10 @@ static void create_counter(int counter, int cpu, pid_t pid)
403 if (call_graph) 403 if (call_graph)
404 attr->sample_type |= PERF_SAMPLE_CALLCHAIN; 404 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
405 405
406 if (raw_samples) 406 if (raw_samples) {
407 attr->sample_type |= PERF_SAMPLE_RAW; 407 attr->sample_type |= PERF_SAMPLE_RAW;
408 attr->sample_type |= PERF_SAMPLE_CPU;
409 }
408 410
409 attr->mmap = track; 411 attr->mmap = track;
410 attr->comm = track; 412 attr->comm = track;
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 8247fd04745a..bbe4c444ef8f 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -58,12 +58,19 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
58 struct dso *dso = NULL; 58 struct dso *dso = NULL;
59 struct thread *thread; 59 struct thread *thread;
60 u64 ip = event->ip.ip; 60 u64 ip = event->ip.ip;
61 u32 cpu = -1;
61 u64 period = 1; 62 u64 period = 1;
62 void *more_data = event->ip.__more_data; 63 void *more_data = event->ip.__more_data;
63 int cpumode; 64 int cpumode;
64 65
65 thread = threads__findnew(event->ip.pid, &threads, &last_match); 66 thread = threads__findnew(event->ip.pid, &threads, &last_match);
66 67
68 if (sample_type & PERF_SAMPLE_CPU) {
69 cpu = *(u32 *)more_data;
70 more_data += sizeof(u32);
71 more_data += sizeof(u32); /* reserved */
72 }
73
67 if (sample_type & PERF_SAMPLE_PERIOD) { 74 if (sample_type & PERF_SAMPLE_PERIOD) {
68 period = *(u64 *)more_data; 75 period = *(u64 *)more_data;
69 more_data += sizeof(u64); 76 more_data += sizeof(u64);
@@ -120,7 +127,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
120 * field, although it should be the same than this perf 127 * field, although it should be the same than this perf
121 * event pid 128 * event pid
122 */ 129 */
123 print_event(0, raw->data, raw->size, 0, thread->comm); 130 print_event(cpu, raw->data, raw->size, 0, thread->comm);
124 } 131 }
125 total += period; 132 total += period;
126 133