diff options
Diffstat (limited to 'tools/perf/util/evlist.c')
| -rw-r--r-- | tools/perf/util/evlist.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 89546228b8ed..e7e195d867ea 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -205,6 +205,20 @@ void perf_evlist__set_leader(struct perf_evlist *evlist) } } +static void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) +{ + attr->precise_ip = 3; + + while (attr->precise_ip != 0) { + int fd = sys_perf_event_open(attr, 0, -1, -1, 0); + if (fd != -1) { + close(fd); + break; + } + --attr->precise_ip; + } +} + int perf_evlist__add_default(struct perf_evlist *evlist) { struct perf_event_attr attr = { @@ -215,13 +229,15 @@ int perf_evlist__add_default(struct perf_evlist *evlist) event_attr_init(&attr); + perf_event_attr__set_max_precise_ip(&attr); + evsel = perf_evsel__new(&attr); if (evsel == NULL) goto error; - /* use strdup() because free(evsel) assumes name is allocated */ - evsel->name = strdup("cycles"); - if (!evsel->name) + /* 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; perf_evlist__add(evlist, evsel); |
