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authorAndi Kleen <ak@linux.intel.com>2019-03-27 01:18:21 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-04-01 20:49:24 +0300
commitf0fbb114e3025f3f737a1e1c5c39c5b2b2e671bd (patch)
tree457cc78618f7a4627d37e436d1cef2cbdf9a21d7 /tools/perf/util/parse-events.h
parentc2b3c170db610896e4e633cba2135045333811c2 (diff)
downloadlinux-f0fbb114e3025f3f737a1e1c5c39c5b2b2e671bd.tar.xz
perf stat: Implement duration_time as a proper event
The perf metric expression use 'duration_time' internally to normalize events. Normal 'perf stat' without -x also prints the duration time. But when using -x, the interval is not output anywhere, which is inconvenient for any post processing which often wants to normalize values to time. So implement 'duration_time' as a proper perf event that can be specified explicitely with -e. The previous implementation of 'duration_time' only worked for metric processing. This adds the concept of a tool event that is handled by the tool. On the kernel level it is still mapped to the dummy software event, but the values are not read anymore, but instead computed by the tool. Add proper plumbing to handle this in the event parser, and display it in 'perf stat'. We don't want 'duration_time' to be added up, so it's only printed for the first CPU. % perf stat -e duration_time,cycles true Performance counter stats for 'true': 555,476 ns duration_time 771,958 cycles 0.000555476 seconds time elapsed 0.000644000 seconds user 0.000000000 seconds sys Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20190326221823.11518-3-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/parse-events.h')
-rw-r--r--tools/perf/util/parse-events.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 5ed035cbcbb7..0c1f5b98f636 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -160,6 +160,10 @@ int parse_events_add_numeric(struct parse_events_state *parse_state,
struct list_head *list,
u32 type, u64 config,
struct list_head *head_config);
+enum perf_tool_event;
+int parse_events_add_tool(struct parse_events_state *parse_state,
+ struct list_head *list,
+ enum perf_tool_event tool_event);
int parse_events_add_cache(struct list_head *list, int *idx,
char *type, char *op_result1, char *op_result2,
struct parse_events_error *error,