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| author | Ingo Molnar <mingo@elte.hu> | 2009-09-02 20:20:38 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-02 21:28:50 +0200 |
| commit | cd6feeeafddbef6abfe4d90fb26e42fd844d34ed (patch) | |
| tree | 382a1afe242e7b8e8e7691a03e9ab39016c5c24b /tools/perf/builtin-trace.c | |
| parent | 65014ab36196f6d86edc9ee23759d6930b9d89a8 (diff) | |
| download | lwn-cd6feeeafddbef6abfe4d90fb26e42fd844d34ed.tar.gz lwn-cd6feeeafddbef6abfe4d90fb26e42fd844d34ed.zip | |
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/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 9 |
1 files changed, 8 insertions, 1 deletions
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) struct dso *dso = NULL; struct thread *thread; u64 ip = event->ip.ip; + u32 cpu = -1; u64 period = 1; void *more_data = event->ip.__more_data; int cpumode; thread = threads__findnew(event->ip.pid, &threads, &last_match); + if (sample_type & PERF_SAMPLE_CPU) { + cpu = *(u32 *)more_data; + more_data += sizeof(u32); + more_data += sizeof(u32); /* reserved */ + } + if (sample_type & PERF_SAMPLE_PERIOD) { period = *(u64 *)more_data; more_data += sizeof(u64); @@ -120,7 +127,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head) * field, although it should be the same than this perf * event pid */ - print_event(0, raw->data, raw->size, 0, thread->comm); + print_event(cpu, raw->data, raw->size, 0, thread->comm); } total += period; |