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perf evlist: Allow asking for max precise_ip in add_default()

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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-0u2m2a8rqw781r6m8svqyne8@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 13:10:20 -03:00
parent 30269dc1a1
commit db918acb35
2 changed files with 10 additions and 3 deletions
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4
tools/perf/util/evlist.c
View File

@ -242,9 +242,9 @@ void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr)
}
}
int perf_evlist__add_default(struct perf_evlist *evlist)
int __perf_evlist__add_default(struct perf_evlist *evlist, bool precise)
{
struct perf_evsel *evsel = perf_evsel__new_cycles(true);
struct perf_evsel *evsel = perf_evsel__new_cycles(precise);
if (evsel == NULL)
return -ENOMEM;

9
tools/perf/util/evlist.h
View File

@ -115,7 +115,14 @@ void perf_evlist__delete(struct perf_evlist *evlist);
void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);
void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel);
int perf_evlist__add_default(struct perf_evlist *evlist);
int __perf_evlist__add_default(struct perf_evlist *evlist, bool precise);
static inline int perf_evlist__add_default(struct perf_evlist *evlist)
{
return __perf_evlist__add_default(evlist, true);
}
int __perf_evlist__add_default_attrs(struct perf_evlist *evlist,
struct perf_event_attr *attrs, size_t nr_attrs);