Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4ad9f594 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return" 



This reverts commit aa7bc7ef.

It removed the fallback from hardware profiling to software profiling.
.e.g., in a VM with no PMU.

Reported-by: default avatarDavid Ahern <daahern@cisco.com>
Cc: David Ahern <daahern@cisco.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent cc841580

tools/perf/builtin-record.c

+0 −3
Original line number Diff line number Diff line
@@ -331,9 +331,6 @@ try_again: 
			else if (err ==  ENODEV && cpu_list) {

				die("No such device - did you specify"

					" an out-of-range profile CPU?\n");

			} else if (err == ENOENT) {

				die("%s event is not supported. ",

				     event_name(evsel));

			} else if (err == EINVAL && sample_id_all_avail) {

				/*

				 * Old kernel, no attr->sample_id_type_all field

tools/perf/builtin-top.c

+0 −2
Original line number Diff line number Diff line
@@ -1247,8 +1247,6 @@ try_again: 
				die("Permission error - are you root?\n"

					"\t Consider tweaking"

					" /proc/sys/kernel/perf_event_paranoid.\n");

			if (err == ENOENT)

				die("%s event is not supported. ", event_name(evsel));

			/*

			 * If it's cycles then fall back to hrtimer

			 * based cpu-clock-tick sw counter, which