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>
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 @@
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..34bd8442 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -46,6 +46,8 @@
{ 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 @@
"CPU-migrations",
"minor-faults",
"major-faults",
+ "alignment-faults",
+ "emulation-faults",
};
#define MAX_ALIASES 8