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Groups > linux.kernel > #1517674
| From | Andi Kleen <andi@firstfloor.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c |
| Date | 2016-11-09 01:20 +0100 |
| Message-ID | <sBoMp-8k7-17@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
From: Andi Kleen <ak@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.hunter@intel.com Signed-off-by: Andi Kleen <ak@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
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[PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Andi Kleen <andi@firstfloor.org> - 2016-11-09 01:20 +0100
Re: [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-11-09 14:20 +0100
Re: [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-11-09 15:00 +0100
Re: [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Adrian Hunter <adrian.hunter@intel.com> - 2016-11-09 15:10 +0100
Re: [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-11-09 15:50 +0100
Re: [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-11-09 15:50 +0100
Re: [PATCH] perf tools pt: Remove obsolete paragraph in intel-pt.c Adrian Hunter <adrian.hunter@intel.com> - 2016-11-10 09:20 +0100
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