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perf evsel: Allow asking for max precise_ip in new_cycles()

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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>
This commit is contained in:
Arnaldo Carvalho de Melo
2017-07-03 13:05:43 -03:00
parent d2396999c9
commit 30269dc1a1
3 changed files with 7 additions and 4 deletions
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2
tools/perf/util/evlist.c
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@@ -244,7 +244,7 @@ void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr)
int perf_evlist__add_default(struct perf_evlist *evlist)
{
struct perf_evsel *evsel = perf_evsel__new_cycles();
struct perf_evsel *evsel = perf_evsel__new_cycles(true);
if (evsel == NULL)
return -ENOMEM;