diff options
| author | Anton Blanchard <anton@samba.org> | 2009-10-18 03:09:29 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2009-10-28 06:13:03 +0100 |
| commit | f7d7986060b2890fc26db6ab5203efbd33aa2497 (patch) | |
| tree | 0ed63257afd3fd02d83ab481af35855603ac4790 /kernel/perf_event.c | |
| parent | powerpc: perf_event: Enable SDAR in continous sample mode (diff) | |
| download | linux-f7d7986060b2890fc26db6ab5203efbd33aa2497.tar.xz linux-f7d7986060b2890fc26db6ab5203efbd33aa2497.zip | |
perf_event: Add alignment-faults and emulation-faults software events
Add two more software events that are common to many cpus.
Alignment faults: When a load or store is not aligned properly.
Emulation faults: When an instruction is emulated in software.
Both cause a very significant slowdown (100x or worse), so identifying and
fixing them is very important.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'kernel/perf_event.c')
| -rw-r--r-- | kernel/perf_event.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 9d0b5c665883..0683b33cbb28 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -4186,6 +4186,8 @@ static const struct pmu *sw_perf_event_init(struct perf_event *event) case PERF_COUNT_SW_PAGE_FAULTS_MAJ: case PERF_COUNT_SW_CONTEXT_SWITCHES: case PERF_COUNT_SW_CPU_MIGRATIONS: + case PERF_COUNT_SW_ALIGNMENT_FAULTS: + case PERF_COUNT_SW_EMULATION_FAULTS: if (!event->parent) { atomic_inc(&perf_swevent_enabled[event_id]); event->destroy = sw_perf_event_destroy; |