diff options
| author | Kim Phillips <[email protected]> | 2017-11-14 15:04:52 -0600 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2017-11-16 14:50:03 -0300 |
| commit | 114bc191c37028d87a540251d93e7b328f4de3fe (patch) | |
| tree | 09316672b9316aca051cfc3ba1fd3b606210242c | |
| parent | 239fb4fed6c49110ebebe7378a84d96e3f0cf55d (diff) | |
perf evsel: Say which PMU Hardware event doesn't support sampling/overflow-interrupts
Help identify to the user the event with the unsupported sampling error.
Also suggest a corrective action.
BEFORE:
$ sudo ./oldperf record -e armv8_pmuv3/mem_access/,ccn/cycles/,armv8_pmuv3/l2d_cache/ true
Error:
PMU Hardware doesn't support sampling/overflow-interrupts.
AFTER:
$ sudo ./newperf record -e armv8_pmuv3/mem_access/,ccn/cycles/,armv8_pmuv3/l2d_cache/ true
Error:
ccn/cycles/: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'
Signed-off-by: Kim Phillips <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | tools/perf/util/evsel.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index cb9bcdb065ea..b8e9def77f44 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2745,8 +2745,9 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, break; case EOPNOTSUPP: if (evsel->attr.sample_period != 0) - return scnprintf(msg, size, "%s", - "PMU Hardware doesn't support sampling/overflow-interrupts."); + return scnprintf(msg, size, + "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'", + perf_evsel__name(evsel)); if (evsel->attr.precise_ip) return scnprintf(msg, size, "%s", "\'precise\' request may not be supported. Try removing 'p' modifier."); |