@@ -2372,6 +2372,13 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
"No such device - did you specify an out-of-range profile CPU?");
break;
case EOPNOTSUPP:
+ /*
+ * Needs to be tested ahead of precise_ip check as
+ * that seems to be true for this case as well
+ */
+ if (evsel->attr.sample_period != 0)
+ return scnprintf(msg, size, "%s",
+ "PMU Hardware doesn't support sampling/overflow-interrupts.");
if (evsel->attr.precise_ip)
return scnprintf(msg, size, "%s",
"\'precise\' request may not be supported. Try removing 'p' modifier.");
This allows (with next change to perf core) for calling out in userspace the exact reason for perf record failing when PMU doesn't support overflow interrupts Signed-off-by: Vineet Gupta <vgupta@synopsys.com> --- tools/perf/util/evsel.c | 7 +++++++ 1 file changed, 7 insertions(+)