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perf_event: Add alignment-faults and emulation-faults software events

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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>
This commit is contained in:
Anton Blanchard 2009-10-18 01:09:29 +00:00 • committed by Paul Mackerras
parent 81cd5ae303
commit f7d7986060
5 changed files with 12 additions and 0 deletions
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2
include/linux/perf_event.h
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@ -102,6 +102,8 @@ enum perf_sw_ids {
PERF_COUNT_SW_CPU_MIGRATIONS = 4,
PERF_COUNT_SW_PAGE_FAULTS_MIN = 5,
PERF_COUNT_SW_PAGE_FAULTS_MAJ = 6,
PERF_COUNT_SW_ALIGNMENT_FAULTS = 7,
PERF_COUNT_SW_EMULATION_FAULTS = 8,
PERF_COUNT_SW_MAX, /* non-ABI */
};