diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-07-03 19:05:43 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-07-19 05:14:12 +0300 |
| commit | 30269dc1a17df5117a2e267835863d4466c3569d (patch) | |
| tree | 5889463259cd5778cc5f9a03e25133487eb08c3d /tools/perf/util/evsel.c | |
| parent | d2396999c998b4e0006aef247e154eff0ed3d8f9 (diff) | |
| download | linux-30269dc1a17df5117a2e267835863d4466c3569d.tar.xz | |
perf evsel: Allow asking for max precise_ip in new_cycles()
There are cases where we want to leave attr.precise_ip as zero, such
as when using 'perf record --no-samples', where this would make the
kernel return -EINVAL.
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-4zq1udecxa51gsapyfwej5fj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
| -rw-r--r-- | tools/perf/util/evsel.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 0e4cd6092564..df567e478a0e 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -268,7 +268,7 @@ struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) return evsel; } -struct perf_evsel *perf_evsel__new_cycles(void) +struct perf_evsel *perf_evsel__new_cycles(bool precise) { struct perf_event_attr attr = { .type = PERF_TYPE_HARDWARE, @@ -278,6 +278,9 @@ struct perf_evsel *perf_evsel__new_cycles(void) struct perf_evsel *evsel; event_attr_init(&attr); + + if (!precise) + goto new_event; /* * Unnamed union member, not supported as struct member named * initializer in older compilers such as gcc 4.4.7 @@ -292,7 +295,7 @@ struct perf_evsel *perf_evsel__new_cycles(void) * to kick in when we return and before perf_evsel__open() is called. */ attr.sample_period = 0; - +new_event: evsel = perf_evsel__new(&attr); if (evsel == NULL) goto out; |