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Commit 4ca0d819 authored by Andi Kleen's avatar Andi Kleen Committed by Arnaldo Carvalho de Melo
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perf list: Fix documentation of :ppp 



Correctly document what is implemented for :ppp on Intel CPUs in recent
kernels.

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1458575793-12091-2-git-send-email-andi@firstfloor.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 3c52b658

tools/perf/Documentation/perf-list.txt

+4 −2
Original line number Diff line number Diff line
@@ -40,10 +40,12 @@ address should be. The 'p' modifier can be specified multiple times: 
 0 - SAMPLE_IP can have arbitrary skid

 1 - SAMPLE_IP must have constant skid

 2 - SAMPLE_IP requested to have 0 skid

 3 - SAMPLE_IP must have 0 skid

 3 - SAMPLE_IP must have 0 skid, or uses randomization to avoid

     sample shadowing effects.



For Intel systems precise event sampling is implemented with PEBS

which supports up to precise-level 2.

which supports up to precise-level 2, and precise level 3 for

some special cases



On AMD systems it is implemented using IBS (up to precise-level 2).

The precise modifier works with event types 0x76 (cpu-cycles, CPU