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

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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 <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Robert Richter <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
David Ahern 2012-07-29 20:53:03 -06:00 • committed by Arnaldo Carvalho de Melo
commit 1a31fc904f
1 changed files with 4 additions and 2 deletions
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6
tools/perf/builtin-top.c
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@ -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");