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perf_counter: Rework the sample ABI

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The PERF_EVENT_READ implementation made me realize we don't
actually need the sample_type int the output sample, since
we already have that in the perf_counter_attr information.

Therefore, remove the PERF_EVENT_MISC_OVERFLOW bit and the
event->type overloading, and imply put counter overflow
samples in a PERF_EVENT_SAMPLE type.

This also fixes the issue that event->type was only 32-bit
and sample_type had 64 usable bits.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-06-25 11:27:12 +02:00 • committed by Ingo Molnar
parent bfbd3381e6
commit e6e18ec79b
5 changed files with 49 additions and 48 deletions
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8
tools/perf/builtin-annotate.c
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@ -855,7 +855,7 @@ static unsigned long total = 0,
total_unknown = 0;
static int
process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
char level;
int show = 0;
@ -1013,10 +1013,10 @@ process_period_event(event_t *event, unsigned long offset, unsigned long head)
static int
process_event(event_t *event, unsigned long offset, unsigned long head)
{
if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
return process_overflow_event(event, offset, head);
switch (event->header.type) {
case PERF_EVENT_SAMPLE:
return process_sample_event(event, offset, head);
case PERF_EVENT_MMAP:
return process_mmap_event(event, offset, head);