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authorArnaldo Carvalho de Melo <acme@redhat.com>2012-08-07 16:58:03 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-08-08 06:43:37 +0400
commitfcf65bf149afa91b875ffde4455967cb63ee0be9 (patch)
tree9b6137e60d4142b1aa00f9e20860bdd8374035d3 /tools/perf/util/trace-event.h
parent8b6ee4c5d48d93527dcf6e36c51cbb7703d7fffb (diff)
downloadlinux-fcf65bf149afa91b875ffde4455967cb63ee0be9.tar.xz
perf evsel: Cache associated event_format
We already lookup the associated event_format when reading the perf.data header, so that we can cache the tracepoint name in evsel->name, so do it a little further and save the event_format itself, so that we can avoid relookups in tools that need to access it. Change the tools to take the most obvious advantage, when they were using pevent_find_event directly. More work is needed for further removing the need of a pointer to pevent, such as when asking for event field values ("common_pid" and the other common fields and per event_format fields). This is something that was planned but only got actually done when Andrey Wagin needed to do this lookup at perf_tool->sample() time, when we don't have access to pevent (session->pevent) to use with pevent_find_event(). Cc: Andrey Wagin <avagin@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: http://lkml.kernel.org/n/tip-txkvew2ckko0b594ae8fbnyk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/trace-event.h')
-rw-r--r--tools/perf/util/trace-event.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 8fef1d6687b7..069d105e0fc0 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -32,6 +32,8 @@ int bigendian(void);
struct pevent *read_trace_init(int file_bigendian, int host_bigendian);
void print_trace_event(struct pevent *pevent, int cpu, void *data, int size);
+void event_format__print(struct event_format *event,
+ int cpu, void *data, int size);
void print_event(struct pevent *pevent, int cpu, void *data, int size,
unsigned long long nsecs, char *comm);