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perf_counter: add PERF_RECORD_CONFIG

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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>
This commit is contained in:
Peter Zijlstra 2009-05-08 18:52:23 +02:00 committed by Ingo Molnar
parent 3df5edad87
commit a85f61abe1
2 changed files with 10 additions and 0 deletions
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2
include/linux/perf_counter.h
View file

@ -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

8
kernel/perf_counter.c
View file

@ -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.
*/