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 <dsah...@gmail.com>
Cc: Arnaldo Carvalho de Melo <a...@ghostprotocols.net>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Robert Richter <robert.rich...@amd.com>
---
tools/perf/builtin-top.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index e3cab5f..0ce665c 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");
--
1.7.10.1
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