From: Andi Kleen <a...@linux.intel.com> Since the unprivileged sched switch event was added in perf, PT doesn't need need perf_event_paranoid=-1 anymore for per cpu decoding. So remove the obsolete paragraph in the documentation.
Cc: adrian.hun...@intel.com Signed-off-by: Andi Kleen <a...@linux.intel.com> --- tools/perf/Documentation/intel-pt.txt | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/tools/perf/Documentation/intel-pt.txt b/tools/perf/Documentation/intel-pt.txt index c6c8318e38a2..c7f817fd3611 100644 --- a/tools/perf/Documentation/intel-pt.txt +++ b/tools/perf/Documentation/intel-pt.txt @@ -550,16 +550,6 @@ Unless /proc/sys/kernel/perf_event_paranoid is set to -1, unprivileged users have memory limits imposed upon them. That affects what buffer sizes they can have as outlined above. -Unless /proc/sys/kernel/perf_event_paranoid is set to -1, unprivileged users are -not permitted to use tracepoints which means there is insufficient side-band -information to decode Intel PT in per-cpu mode, and potentially workload-only -mode too if the workload creates new processes. - -Note also, that to use tracepoints, read-access to debugfs is required. So if -debugfs is not mounted or the user does not have read-access, it will again not -be possible to decode Intel PT in per-cpu mode. - - sched_switch tracepoint ----------------------- -- 2.5.5
