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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-10-20 12:50:11 -0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-11-30 19:19:04 -0200 |
| commit | c320c7b7d380e630f595de1236d9d085b035d5b4 (patch) | |
| tree | e1544fa8cc259a1d300fac9104dd3c46458572fe /include/linux/perf_event.h | |
| parent | 068ffaa8bfb67c2ddb3ecaf38cc90f94a1a92fe3 (diff) | |
| download | lwn-c320c7b7d380e630f595de1236d9d085b035d5b4.tar.gz lwn-c320c7b7d380e630f595de1236d9d085b035d5b4.zip | |
perf events: Precalculate the header space for PERF_SAMPLE_ fields
PERF_SAMPLE_{CALLCHAIN,RAW} have variable lenghts per sample, but the others
can be precalculated, reducing a bit the per sample cost.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index cbf04cc1e630..adf6d9931643 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -758,6 +758,8 @@ struct perf_event { u64 shadow_ctx_time; struct perf_event_attr attr; + u16 header_size; + u16 read_size; struct hw_perf_event hw; struct perf_event_context *ctx; |