From aa7bc7ef73efc46d7c3a0e185eefaf85744aec98 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 10 Jan 2011 13:36:24 -0200 Subject: [PATCH] perf tools: Emit clearer message for sys_perf_event_open ENOENT return Improve sys_perf_event_open ENOENT return handling in top and record, just like 5a3446b does for stat. Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Tom Zanussi LKML-Reference: Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 3 +++ tools/perf/builtin-top.c | 2 ++ 2 files changed, 5 insertions(+) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 7bc049035484..7069bd3e90b3 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -331,6 +331,9 @@ 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 diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 1e67ab9c7ebc..6ce4042421bd 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1247,6 +1247,8 @@ 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 -- 2.20.1