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authorAnton Blanchard <anton@samba.org>2009-10-18 01:09:29 +0000
committerPaul Mackerras <paulus@samba.org>2009-10-28 16:13:03 +1100
commitf7d7986060b2890fc26db6ab5203efbd33aa2497 (patch)
tree0ed63257afd3fd02d83ab481af35855603ac4790 /tools/perf/design.txt
parent81cd5ae303e88a1e9d3a3e0f1fe8abd100edde16 (diff)
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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 'tools/perf/design.txt')
-rw-r--r--tools/perf/design.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/design.txt b/tools/perf/design.txt
index fdd42a824c9..f000c30877a 100644
--- a/tools/perf/design.txt
+++ b/tools/perf/design.txt
@@ -137,6 +137,8 @@ enum sw_event_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,
};
Counters of the type PERF_TYPE_TRACEPOINT are available when the ftrace event