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| author | Jiri Olsa <[email protected]> | 2015-09-19 14:47:07 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2015-09-28 18:50:54 +0000 |
| commit | dc240c5dc2a02e335c5bcb50ad3a1274818c8609 (patch) | |
| tree | eddd6aeca2ce858c2beaba83bf392db6fe6aadfe /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | perf tools: Use __map__is_kernel() when synthesizing kernel module mmap records (diff) | |
| download | kernel-dc240c5dc2a02e335c5bcb50ad3a1274818c8609.tar.gz kernel-dc240c5dc2a02e335c5bcb50ad3a1274818c8609.zip | |
tools lib api fs: Store tracing mountpoint for better error message
Storing the actual tracing path mountpoint to display correct
error message hint ('Hint:' line). The error hint rediscovers
mountpoints, but it could be different from what we actually
used in tracing path.
Before we'd display debugfs mount even though tracefs was used:
$ perf record -e sched:sched_krava ls
event syntax error: 'sched:sched_krava'
\___ can't access trace events
Error: No permissions to read /sys/kernel/debug/tracing/events/sched/sched_krava
Hint: Try 'sudo mount -o remount,mode=755 /sys/kernel/debug'
...
After this change, correct mountpoint is displayed:
$ perf record -e sched:sched_krava ls
event syntax error: 'sched:sched_krava'
\___ can't access trace events
Error: No permissions to read /sys/kernel/debug/tracing/events/sched/sched_krava
Hint: Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing'
...
Signed-off-by: Jiri Olsa <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Raphael Beamonte <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions