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| author | Ingo Molnar <mingo@elte.hu> | 2009-06-05 20:07:51 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-05 20:07:51 +0400 |
| commit | b2fef0762fdb65cf8702eea93f4e58abeb0ecefc (patch) | |
| tree | 8f7c82a62a895f434e9817084f0c5210fd7b1f80 /Documentation | |
| parent | 6a24ed6c6082ec65d19331a4bfa30c0512a1a822 (diff) | |
| download | linux-b2fef0762fdb65cf8702eea93f4e58abeb0ecefc.tar.xz | |
perf_counter tools: Sample and display frequency adjustment changes
To allow the debugging of frequency-adjusting counters, sample
those adjustments and display them in perf report -D.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/perf_counter/builtin-record.c | 2 | ||||
| -rw-r--r-- | Documentation/perf_counter/builtin-report.c | 39 |
2 files changed, 34 insertions, 7 deletions
diff --git a/Documentation/perf_counter/builtin-record.c b/Documentation/perf_counter/builtin-record.c index d4ad3057a711..43ddab31ac39 100644 --- a/Documentation/perf_counter/builtin-record.c +++ b/Documentation/perf_counter/builtin-record.c @@ -347,7 +347,7 @@ static void create_counter(int counter, int cpu, pid_t pid) memset(&attr, 0, sizeof(attr)); attr.config = event_id[counter]; attr.sample_period = event_count[counter]; - attr.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; + attr.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID | PERF_SAMPLE_PERIOD; attr.freq = freq; attr.mmap = track; attr.comm = track; diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c index 5af105c280b5..242e09ff3658 100644 --- a/Documentation/perf_counter/builtin-report.c +++ b/Documentation/perf_counter/builtin-report.c @@ -69,12 +69,20 @@ struct fork_event { __u32 pid, ppid; }; -typedef union event_union { +struct period_event { struct perf_event_header header; - struct ip_event ip; - struct mmap_event mmap; - struct comm_event comm; - struct fork_event fork; + __u64 time; + __u64 id; + __u64 sample_period; +}; + +typedef union event_union { + struct perf_event_header header; + struct ip_event ip; + struct mmap_event mmap; + struct comm_event comm; + struct fork_event fork; + struct period_event period; } event_t; static LIST_HEAD(dsos); @@ -1053,6 +1061,19 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head) } static int +process_period_event(event_t *event, unsigned long offset, unsigned long head) +{ + dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n", + (void *)(offset + head), + (void *)(long)(event->header.size), + event->period.time, + event->period.id, + event->period.sample_period); + + return 0; +} + +static int process_event(event_t *event, unsigned long offset, unsigned long head) { if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) @@ -1068,11 +1089,12 @@ process_event(event_t *event, unsigned long offset, unsigned long head) case PERF_EVENT_FORK: return process_fork_event(event, offset, head); + case PERF_EVENT_PERIOD: + return process_period_event(event, offset, head); /* * We dont process them right now but they are fine: */ - case PERF_EVENT_PERIOD: case PERF_EVENT_THROTTLE: case PERF_EVENT_UNTHROTTLE: return 0; @@ -1157,6 +1179,11 @@ more: size = event->header.size; + dprintf("%p [%p]: event: %d\n", + (void *)(offset + head), + (void *)(long)event->header.size, + event->header.type); + if (!size || process_event(event, offset, head) < 0) { dprintf("%p [%p]: skipping unknown header type: %d\n", |