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perf tools: Emit clearer message for sys_perf_event_open ENOENT return

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Improve sys_perf_event_open ENOENT return handling in top and record, just
like 5a3446b does for stat.

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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2011-01-10 13:36:24 -02:00
parent 5a3446bc64
commit aa7bc7ef73
2 changed files with 5 additions and 0 deletions
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3
tools/perf/builtin-record.c
View file

@ -331,6 +331,9 @@ static void create_counter(struct perf_evsel *evsel, int cpu)
else if (err == ENODEV && cpu_list) { else if (err == ENODEV && cpu_list) {
die("No such device - did you specify" die("No such device - did you specify"
" an out-of-range profile CPU?\n"); " 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) { } else if (err == EINVAL && sample_id_all_avail) {
/* /*
* Old kernel, no attr->sample_id_type_all field * Old kernel, no attr->sample_id_type_all field

2
tools/perf/builtin-top.c
View file

@ -1247,6 +1247,8 @@ static void start_counter(int i, struct perf_evsel *evsel)
die("Permission error - are you root?\n" die("Permission error - are you root?\n"
"\t Consider tweaking" "\t Consider tweaking"
" /proc/sys/kernel/perf_event_paranoid.\n"); " /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 * If it's cycles then fall back to hrtimer
* based cpu-clock-tick sw counter, which * based cpu-clock-tick sw counter, which