perf evsel: Introduce constructor for cycles event
That is the default used when no events is specified in tools, separate
it so that simpler tools that need no evlist can use it directly.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-67mwuthscwroz88x9pswcqyv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 2a40b8e..097b3ed 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -239,31 +239,13 @@
int perf_evlist__add_default(struct perf_evlist *evlist)
{
- struct perf_event_attr attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_CPU_CYCLES,
- };
- struct perf_evsel *evsel;
+ struct perf_evsel *evsel = perf_evsel__new_cycles();
- event_attr_init(&attr);
-
- perf_event_attr__set_max_precise_ip(&attr);
-
- evsel = perf_evsel__new(&attr);
if (evsel == NULL)
- goto error;
-
- /* use asprintf() because free(evsel) assumes name is allocated */
- if (asprintf(&evsel->name, "cycles%.*s",
- attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0)
- goto error_free;
+ return -ENOMEM;
perf_evlist__add(evlist, evsel);
return 0;
-error_free:
- perf_evsel__delete(evsel);
-error:
- return -ENOMEM;
}
int perf_evlist__add_dummy(struct perf_evlist *evlist)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 8c54df6..4c2b31d 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -253,6 +253,34 @@
return evsel;
}
+struct perf_evsel *perf_evsel__new_cycles(void)
+{
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_HARDWARE,
+ .config = PERF_COUNT_HW_CPU_CYCLES,
+ };
+ struct perf_evsel *evsel;
+
+ event_attr_init(&attr);
+
+ perf_event_attr__set_max_precise_ip(&attr);
+
+ evsel = perf_evsel__new(&attr);
+ if (evsel == NULL)
+ goto out;
+
+ /* use asprintf() because free(evsel) assumes name is allocated */
+ if (asprintf(&evsel->name, "cycles%.*s",
+ attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0)
+ goto error_free;
+out:
+ return evsel;
+error_free:
+ perf_evsel__delete(evsel);
+ evsel = NULL;
+ goto out;
+}
+
/*
* Returns pointer with encoded error via <linux/err.h> interface.
*/
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 8a4a6c9..4d44129 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -175,6 +175,8 @@
return perf_evsel__newtp_idx(sys, name, 0);
}
+struct perf_evsel *perf_evsel__new_cycles(void);
+
struct event_format *event_format__new(const char *sys, const char *name);
void perf_evsel__init(struct perf_evsel *evsel,