perf top: Error handling for counter creation should parallel perf-record

5a7ed29 fixed up perf-record but not perf-top. Similar argument holds
for it -- fallback to PMU only if it does not exist and handle invalid
attributes separately.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Link: http://lkml.kernel.org/r/1343616783-6360-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 40264eaa9f0f..34096275a7b5 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -943,8 +943,10 @@ try_again:
                          * based cpu-clock-tick sw counter, which
                          * is always available even if no PMU support:
                          */
-                        if (attr->type == PERF_TYPE_HARDWARE &&
-                            attr->config == PERF_COUNT_HW_CPU_CYCLES) {
+                        if ((err == ENOENT || err == ENXIO) &&
+                            (attr->type == PERF_TYPE_HARDWARE) &&
+                            (attr->config == PERF_COUNT_HW_CPU_CYCLES)) {
+
                                 if (verbose)
                                         ui__warning("Cycles event not supported,\n"
                                                     "trying to fall back to cpu-clock-ticks\n");