diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-02-13 20:45:24 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-02-13 21:22:33 +0100 |
| commit | d6195a6a2c247515d5832debb51c03a74dc3f8f6 (patch) | |
| tree | 18a5f7ae1648ab4167c8f2db7fd372b031bce600 /tools/perf/builtin-record.c | |
| parent | tools lib traceevent plugin function: Initialize 'index' variable (diff) | |
| download | linux-d6195a6a2c247515d5832debb51c03a74dc3f8f6.tar.xz linux-d6195a6a2c247515d5832debb51c03a74dc3f8f6.zip | |
perf evsel: Inform how to make a sysctl setting permanent
When a tool can't open counters due to the kernel.perf_event_paranoit
sysctl setting, we inform how to tweak it to allow the operation to
succeed, in addition to that, suggest setting /etc/sysctl.conf to
make the setting permanent.
Suggested-by: Ingo Molnar <mingo@kernel.org>
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-4gwe99k4a6p12d4u8bbyttj2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-record.c')
| -rw-r--r-- | tools/perf/builtin-record.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index ffac8ca9fb01..2ddf189968dc 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -418,7 +418,7 @@ static int record__mmap(struct record *rec) static int record__open(struct record *rec) { - char msg[512]; + char msg[BUFSIZ]; struct perf_evsel *pos; struct perf_evlist *evlist = rec->evlist; struct perf_session *session = rec->session; |