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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-06-02 15:08:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-02 21:45:29 +0200 |
| commit | 8e5799b1ad2a0567fdfaaf0e91b40efee010f2c1 (patch) | |
| tree | bd3f45c348f48411a4496229572643211cbd59b8 /include/linux/perf_counter.h | |
| parent | 53e111a730ea8b002d57dd226098c12789993329 (diff) | |
| download | lwn-8e5799b1ad2a0567fdfaaf0e91b40efee010f2c1.tar.gz lwn-8e5799b1ad2a0567fdfaaf0e91b40efee010f2c1.zip | |
perf_counter: Add unique counter id
Stephan raised the issue that we currently cannot distinguish between
similar counters within a group (PERF_RECORD_GROUP uses the config
value as identifier).
Therefore, generate a new ID for each counter using a global u64
sequence counter.
Reported-by: Stephane Eranian <eranian@googlemail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
| -rw-r--r-- | include/linux/perf_counter.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 9ec20fc6bd36..4845a214b9e7 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -114,8 +114,9 @@ enum perf_counter_record_format { * in increasing order of bit value, after the counter value. */ enum perf_counter_read_format { - PERF_FORMAT_TOTAL_TIME_ENABLED = 1, - PERF_FORMAT_TOTAL_TIME_RUNNING = 2, + PERF_FORMAT_TOTAL_TIME_ENABLED = 1U << 0, + PERF_FORMAT_TOTAL_TIME_RUNNING = 1U << 1, + PERF_FORMAT_ID = 1U << 2, }; /* @@ -290,7 +291,7 @@ enum perf_event_type { * { u32 cpu, res; } && PERF_RECORD_CPU * * { u64 nr; - * { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP + * { u64 id, val; } cnt[nr]; } && PERF_RECORD_GROUP * * { u16 nr, * hv, @@ -503,6 +504,7 @@ struct perf_counter { struct rcu_head rcu_head; struct pid_namespace *ns; + u64 id; #endif }; |