Hello,
"perf list" listing of hardware events doesn't work on older ARM devices.
The change enabling event detection:
commit b41f1cec91c37eeea6fdb15effbfa24ea0a5536b
Author: Namhyung Kim <namhyung....@lge.com>
Date: Tue Aug 27 11:41:53 2013 +0900
perf list: Skip unsupported events
uses the following code in tools/perf/util/parse-events.c:
struct perf_event_attr attr = {
.type = type,
.config = config,
.disabled = 1,
.exclude_kernel = 1,
};
On ARM machines pre-dating the Cortex-A15 this doesn't work, as
these machines don't support .exclude_kernel. So starting with 3.12
"perf list" does not report any hardware events at all on older
machines (seen on Rasp-Pi, Pandaboard, Beagleboard, etc).
If we drop the "exclude_kernel" attribute events are properly reported.
Reported-by: Chad Paradis <chad.para...@umit.maine.edu>
Signed-off-by: Vince Weaver <vincent.wea...@maine.edu>
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 6de6f89..360ecab 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1087,7 +1087,6 @@ static bool is_event_supported(u8 type, unsigned config)
.type = type,
.config = config,
.disabled = 1,
- .exclude_kernel = 1,
};
struct {
struct thread_map map;
--
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