From fcf65bf149afa91b875ffde4455967cb63ee0be9 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 7 Aug 2012 09:58:03 -0300 Subject: 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 Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo Link: http://lkml.kernel.org/n/tip-txkvew2ckko0b594ae8fbnyk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- .../util/scripting-engines/trace-event-python.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) (limited to 'tools/perf/util/scripting-engines/trace-event-python.c') diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c index ce4d1b0c3862..8006978d8398 100644 --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -27,6 +27,7 @@ #include #include "../../perf.h" +#include "../evsel.h" #include "../util.h" #include "../event.h" #include "../thread.h" @@ -194,16 +195,21 @@ static void define_event_symbols(struct event_format *event, define_event_symbols(event, ev_name, args->next); } -static inline -struct event_format *find_cache_event(struct pevent *pevent, int type) +static inline struct event_format *find_cache_event(struct perf_evsel *evsel) { static char ev_name[256]; struct event_format *event; + int type = evsel->attr.config; + /* + * XXX: Do we really need to cache this since now we have evsel->tp_format + * cached already? Need to re-read this "cache" routine that as well calls + * define_event_symbols() :-\ + */ if (events[type]) return events[type]; - events[type] = event = pevent_find_event(pevent, type); + events[type] = event = evsel->tp_format; if (!event) return NULL; @@ -217,7 +223,7 @@ struct event_format *find_cache_event(struct pevent *pevent, int type) static void python_process_event(union perf_event *perf_event __unused, struct pevent *pevent, struct perf_sample *sample, - struct perf_evsel *evsel __unused, + struct perf_evsel *evsel, struct machine *machine __unused, struct thread *thread) { @@ -228,7 +234,6 @@ static void python_process_event(union perf_event *perf_event __unused, unsigned long s, ns; struct event_format *event; unsigned n = 0; - int type; int pid; int cpu = sample->cpu; void *data = sample->raw_data; @@ -239,11 +244,9 @@ static void python_process_event(union perf_event *perf_event __unused, if (!t) Py_FatalError("couldn't create Python tuple"); - type = trace_parse_common_type(pevent, data); - - event = find_cache_event(pevent, type); + event = find_cache_event(evsel); if (!event) - die("ug! no event found for type %d", type); + die("ug! no event found for type %d", (int)evsel->attr.config); pid = trace_parse_common_pid(pevent, data); -- cgit v1.2.3