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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-04-06 11:45:08 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-07 10:48:59 +0200 |
| commit | 0c593b3411341e3a05a61f5527df36ab02bd11e8 (patch) | |
| tree | 3f9add4fc4636e8d5154afc9a4cc26e705482624 | |
| parent | 79f146415623fe74f39af67c0f6adc208939a410 (diff) | |
| download | linux-0c593b3411341e3a05a61f5527df36ab02bd11e8.tar.bz2 | |
perf_counter: comment the perf_event_type stuff
Describe the event format.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094518.211174347@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/perf_counter.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index ef4dcbff75ab..81220188d058 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -208,6 +208,20 @@ struct perf_event_header { enum perf_event_type { + /* + * The MMAP events record the PROT_EXEC mappings so that we can + * correlate userspace IPs to code. They have the following structure: + * + * struct { + * struct perf_event_header header; + * + * u32 pid, tid; + * u64 addr; + * u64 len; + * u64 pgoff; + * char filename[]; + * }; + */ PERF_EVENT_MMAP = 1, PERF_EVENT_MUNMAP = 2, @@ -217,6 +231,24 @@ enum perf_event_type { * * These events will have types of the form: * PERF_EVENT_COUNTER_OVERFLOW { | __PERF_EVENT_* } * + * + * struct { + * struct perf_event_header header; + * + * { u64 ip; } && __PERF_EVENT_IP + * { u32 pid, tid; } && __PERF_EVENT_TID + * + * { u64 nr; + * { u64 event, val; } cnt[nr]; } && __PERF_EVENT_GROUP + * + * { u16 nr, + * hv, + * kernel, + * user; + * u64 ips[nr]; } && __PERF_EVENT_CALLCHAIN + * + * { u64 time; } && __PERF_EVENT_TIME + * }; */ PERF_EVENT_COUNTER_OVERFLOW = 1UL << 31, __PERF_EVENT_IP = PERF_RECORD_IP, |