From: Namhyung Kim <namhy...@kernel.org> Add APIs for software dummy event to track task/comm/mmap events separately. The perf record will use them to save such events in a separate mmap buffer to make it easy to index. This is just a preparation of multi-thread support which will come later.
Cc: Adrian Hunter <adrian.hun...@intel.com> Link: http://lkml.kernel.org/n/tip-qo7opc5kb3ueuicyjdyqu...@git.kernel.org Signed-off-by: Namhyung Kim <namhy...@kernel.org> Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/util/evlist.c | 30 ++++++++++++++++++++++++++++++ tools/perf/util/evlist.h | 1 + tools/perf/util/evsel.h | 15 +++++++++++++++ 3 files changed, 46 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index be440df29615..7428d65650c9 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -267,6 +267,36 @@ int perf_evlist__add_dummy(struct perf_evlist *evlist) return 0; } +int perf_evlist__add_dummy_tracking(struct perf_evlist *evlist) +{ + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_DUMMY, + .exclude_kernel = 1, + }; + struct perf_evsel *evsel; + + event_attr_init(&attr); + + evsel = perf_evsel__new(&attr); + if (evsel == NULL) + goto error; + + /* use strdup() because free(evsel) assumes name is allocated */ + evsel->name = strdup("dummy"); + if (!evsel->name) + goto error_free; + + perf_evlist__add(evlist, evsel); + perf_evlist__set_tracking_event(evlist, evsel); + + return 0; +error_free: + perf_evsel__delete(evsel); +error: + return -ENOMEM; +} + static int perf_evlist__add_attrs(struct perf_evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) { diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index dc66436add98..c11cb80e7847 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -76,6 +76,7 @@ static inline int perf_evlist__add_default(struct perf_evlist *evlist) return __perf_evlist__add_default(evlist, true); } +int perf_evlist__add_dummy_tracking(struct perf_evlist *evlist); int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs); diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 4f8430a85531..6e18b9ff997d 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -411,6 +411,21 @@ static inline bool perf_evsel__is_clock(struct perf_evsel *evsel) perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK); } +/** + * perf_evsel__is_dummy_tracking - Return whether given evsel is a dummy + * event for tracking meta events only + * + * @evsel - evsel selector to be tested + * + * Return %true if event is a dummy tracking event + */ +static inline bool perf_evsel__is_dummy_tracking(struct perf_evsel *evsel) +{ + return evsel->attr.type == PERF_TYPE_SOFTWARE && + evsel->attr.config == PERF_COUNT_SW_DUMMY && + evsel->attr.task == 1 && evsel->attr.mmap == 1; +} + struct perf_attr_details { bool freq; bool verbose; -- 2.17.1
