Commit-ID: f7d7986060b2890fc26db6ab5203efbd33aa2497
Gitweb: http://git.kernel.org/tip/f7d7986060b2890fc26db6ab5203efbd33aa2497
Author: Anton Blanchard <anton@xxxxxxxxx>
AuthorDate: Sun, 18 Oct 2009 01:09:29 +0000
Committer: Paul Mackerras <paulus@xxxxxxxxx>
CommitDate: Wed, 28 Oct 2009 16:13:03 +1100
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@xxxxxxxxx>
Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx>
---
include/linux/perf_counter.h | 2 ++
include/linux/perf_event.h | 2 ++
kernel/perf_event.c | 2 ++
tools/perf/design.txt | 2 ++
tools/perf/util/parse-events.c | 4 ++++
5 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 7b7fbf4..d6b95d1 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -106,6 +106,8 @@ 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 */
};
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 2e6d95f..a33707a 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -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 */
};
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 9d0b5c6..0683b33 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;
diff --git a/tools/perf/design.txt b/tools/perf/design.txt
index fdd42a8..f000c30 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 8cfb48c..34bd844 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
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|