From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 05/23] perf list: Fix documentation of :ppp
Date: Wed, 23 Mar 2016 18:17:42 -0300 [thread overview]
Message-ID: <1458767880-3288-6-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1458767880-3288-1-git-send-email-acme@kernel.org>
From: Andi Kleen <ak@linux.intel.com>
Correctly document what is implemented for :ppp on Intel CPUs in recent
kernels.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri 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: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-list.txt | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 79483f40e991..ec723d0a5bb3 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -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
--
2.5.5
next prev parent reply other threads:[~2016-03-23 21:18 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-23 21:17 [GIT PULL 00/23] perf/core improvements and fixes Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 01/23] perf test: Remove 'core_id' check in topo test Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 02/23] tools: Move utilities.mak from perf to tools/scripts/ Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 03/23] perf symbols: Record text offset in dso to calculate objdump address Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 04/23] perf bench numa: Fix assertion for nodes bitfield Arnaldo Carvalho de Melo
2016-03-23 21:17 ` Arnaldo Carvalho de Melo [this message]
2016-03-23 21:17 ` [PATCH 06/23] perf tools: Remove misplaced __maybe_unused Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 07/23] perf tests: Forward the perf_sample in the dwarf unwind test Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 08/23] perf tools: Add cpumode to struct perf_sample Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 09/23] perf machine: Rename perf_event__preprocess_sample to machine__resolve Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 10/23] perf thread: Rename perf_event__preprocess_sample_addr to thread__resolve Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 11/23] perf script: Remove lots of unused arguments Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 12/23] perf tools: Remove unused DIE_IF macro Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 13/23] perf tools: Simplify die() mechanism Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 14/23] perf tools: Remove needless 'extern' from function prototypes Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 15/23] tools lib traceevent: Remove redundant CPU output Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 16/23] tools include: Copy linux/stringify.h from the kernel Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 17/23] perf tools: Do not include stringify.h from the kernel sources Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 18/23] perf tools: Remove unused perf_pathdup, xstrdup functions Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 19/23] perf help: Use asprintf instead of adhoc equivalents Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 20/23] perf probe: No need to use formatting strbuf method Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 21/23] perf tools: Unexport some methods unused outside strbuf.c Arnaldo Carvalho de Melo
2016-03-23 21:17 ` [PATCH 22/23] perf llvm: Use realpath to canonicalize paths Arnaldo Carvalho de Melo
2016-03-23 21:18 ` [PATCH 23/23] perf llvm: Use strerror_r instead of the thread unsafe strerror one Arnaldo Carvalho de Melo
2016-03-24 7:32 ` [GIT PULL 00/23] perf/core improvements and fixes Ingo Molnar
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