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authorPeter Zijlstra <peterz@infradead.org>2010-04-08 23:03:20 +0200
committerIngo Molnar <mingo@elte.hu>2010-05-07 11:31:02 +0200
commitab608344bcbde4f55ec4cd911b686b0ce3eae076 (patch)
treeebd38efabfaab59d6de11a24143d70e1eec36fae /tools/perf/builtin-top.c
parent2b0b5c6fe9b383f3cf35a0a6371c9d577bd523ff (diff)
downloadlinux-2.6.34-ux500-ab608344bcbde4f55ec4cd911b686b0ce3eae076.tar.gz
perf, x86: Improve the PEBS ABI
Rename perf_event_attr::precise to perf_event_attr::precise_ip and widen it to 2 bits. This new field describes the required precision of the PERF_SAMPLE_IP field: 0 - SAMPLE_IP can have arbitrary skid 1 - SAMPLE_IP must have constant skid 2 - SAMPLE_IP requested to have 0 skid 3 - SAMPLE_IP must have 0 skid And modify the Intel PEBS code accordingly. The PEBS implementation now supports up to precise_ip == 2, where we perform the IP fixup. Also s/PERF_RECORD_MISC_EXACT/&_IP/ to clarify its meaning, this bit should be set for each PERF_SAMPLE_IP field known to match the actual instruction triggering the event. This new scheme allows for a PEBS mode that uses the buffer for more than a single event. Signed-off-by: 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: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-top.c')
-rw-r--r--tools/perf/builtin-top.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 3de397764cb..ed9b5b6905f 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1021,7 +1021,7 @@ static void event__process_sample(const event_t *self,
return;
}
- if (self->header.misc & PERF_RECORD_MISC_EXACT)
+ if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
exact_samples++;
if (event__preprocess_sample(self, session, &al, symbol_filter) < 0 ||