diff options
| author | Anton Blanchard <anton@samba.org> | 2009-10-18 05:09:29 +0400 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2009-10-28 08:13:03 +0300 |
| commit | f7d7986060b2890fc26db6ab5203efbd33aa2497 (patch) | |
| tree | 0ed63257afd3fd02d83ab481af35855603ac4790 /tools/perf | |
| parent | 81cd5ae303e88a1e9d3a3e0f1fe8abd100edde16 (diff) | |
| download | linux-f7d7986060b2890fc26db6ab5203efbd33aa2497.tar.xz | |
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')
| -rw-r--r-- | tools/perf/design.txt | 2 | ||||
| -rw-r--r-- | tools/perf/util/parse-events.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/design.txt b/tools/perf/design.txt index fdd42a824c98..f000c30877ac 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 diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 8cfb48cbbea0..34bd84423933 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -46,6 +46,8 @@ static struct event_symbol event_symbols[] = { { CSW(PAGE_FAULTS_MAJ), "major-faults", "" }, { CSW(CONTEXT_SWITCHES), "context-switches", "cs" }, { CSW(CPU_MIGRATIONS), "cpu-migrations", "migrations" }, + { CSW(ALIGNMENT_FAULTS), "alignment-faults", "" }, + { CSW(EMULATION_FAULTS), "emulation-faults", "" }, }; #define __PERF_EVENT_FIELD(config, name) \ @@ -74,6 +76,8 @@ static const char *sw_event_names[] = { "CPU-migrations", "minor-faults", "major-faults", + "alignment-faults", + "emulation-faults", }; #define MAX_ALIASES 8 |