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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-05-08 18:52:23 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-08 20:36:58 +0200 |
| commit | a85f61abe11a46553c4562e74edb27ebc782aeb7 (patch) | |
| tree | 47a7fab94fe75dc75c0fdf8c590a6f41ef2be527 | |
| parent | 3df5edad87a998273aa5a9a8c728c05d855ad00e (diff) | |
| download | lwn-a85f61abe11a46553c4562e74edb27ebc782aeb7.tar.gz lwn-a85f61abe11a46553c4562e74edb27ebc782aeb7.zip | |
perf_counter: add PERF_RECORD_CONFIG
Much like CONFIG_RECORD_GROUP records the hw_event.config to
identify the values, allow to record this for all counters.
[ Impact: extend perfcounter output record 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: <20090508170028.923228280@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/perf_counter.h | 2 | ||||
| -rw-r--r-- | kernel/perf_counter.c | 8 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 88f863ec2748..0e6303d36c66 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -104,6 +104,7 @@ enum perf_counter_record_format { PERF_RECORD_ADDR = 1U << 3, PERF_RECORD_GROUP = 1U << 4, PERF_RECORD_CALLCHAIN = 1U << 5, + PERF_RECORD_CONFIG = 1U << 6, }; /* @@ -258,6 +259,7 @@ enum perf_event_type { * { u32 pid, tid; } && PERF_RECORD_TID * { u64 time; } && PERF_RECORD_TIME * { u64 addr; } && PERF_RECORD_ADDR + * { u64 config; } && PERF_RECORD_CONFIG * * { u64 nr; * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index f4883f1f47eb..c615f52aa408 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -1994,6 +1994,11 @@ static void perf_counter_output(struct perf_counter *counter, header.size += sizeof(u64); } + if (record_type & PERF_RECORD_CONFIG) { + header.type |= PERF_RECORD_CONFIG; + header.size += sizeof(u64); + } + if (record_type & PERF_RECORD_GROUP) { header.type |= PERF_RECORD_GROUP; header.size += sizeof(u64) + @@ -2029,6 +2034,9 @@ static void perf_counter_output(struct perf_counter *counter, if (record_type & PERF_RECORD_ADDR) perf_output_put(&handle, addr); + if (record_type & PERF_RECORD_CONFIG) + perf_output_put(&handle, counter->hw_event.config); + /* * XXX PERF_RECORD_GROUP vs inherited counters seems difficult. */ |