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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-07 13:14:56 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-07 13:14:56 -0300 |
| commit | 5bae0250237f7a5ec4355f9920701de247b8db91 (patch) | |
| tree | 6617ae58a86828d688a0815ed367ca83d83c80df /tools/perf/util/evlist.c | |
| parent | perf tests: No need to set attr.sample_freq in the perf time to TSC test (diff) | |
| download | linux-dev-5bae0250237f7a5ec4355f9920701de247b8db91.tar.xz linux-dev-5bae0250237f7a5ec4355f9920701de247b8db91.zip | |
perf evlist: Introduce perf_evlist__new_dummy constructor
For case where all we need is an evlist with just an "dummy" evsel,
like in some 'perf test' entries.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-q52le0pblm2k3ncvyilelr9z@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.c')
| -rw-r--r-- | tools/perf/util/evlist.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index b9eac0daa0b9..fa6dbf0ea0d6 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -68,6 +68,18 @@ struct perf_evlist *perf_evlist__new_default(void) return evlist; } +struct perf_evlist *perf_evlist__new_dummy(void) +{ + struct perf_evlist *evlist = perf_evlist__new(); + + if (evlist && perf_evlist__add_dummy(evlist)) { + perf_evlist__delete(evlist); + evlist = NULL; + } + + return evlist; +} + /** * perf_evlist__set_id_pos - set the positions of event ids. * @evlist: selected event list @@ -248,6 +260,22 @@ error: return -ENOMEM; } +int perf_evlist__add_dummy(struct perf_evlist *evlist) +{ + struct perf_event_attr attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_DUMMY, + .size = sizeof(attr), /* to capture ABI version */ + }; + struct perf_evsel *evsel = perf_evsel__new(&attr); + + if (evsel == NULL) + return -ENOMEM; + + perf_evlist__add(evlist, evsel); + return 0; +} + static int perf_evlist__add_attrs(struct perf_evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs) { |