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 <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Tom Zanussi <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 7bc0490354847a949d2f2105cca86e67f8e0b1b4..7069bd3e90b308871d4f309b99335cba09b9fbbc 100644 (file)
--- 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 1e67ab9c7ebc46c5df87e6219ad023b5509207f2..6ce4042421bd92b1574f50409cf60f506675ddfd 100644 (file)
--- 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