From: tip-bot for Adrian Hunter <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: adrian.hunter@intel.com, tglx@linutronix.de, hpa@zytor.com,
mingo@kernel.org, linux-kernel@vger.kernel.org,
peterz@infradead.org, kan.liang@linux.intel.com,
jolsa@kernel.org, acme@redhat.com, namhyung@kernel.org,
alexander.shishkin@linux.intel.com
Subject: [tip:perf/core] perf intel-pt: Add brief documentation for PEBS via Intel PT
Date: Thu, 15 Aug 2019 02:33:02 -0700 [thread overview]
Message-ID: <tip-243384dd25c8ea721c5c82a229eaf33cbd1bfd52@git.kernel.org> (raw)
In-Reply-To: <20190806084606.4021-8-alexander.shishkin@linux.intel.com>
Commit-ID: 243384dd25c8ea721c5c82a229eaf33cbd1bfd52
Gitweb: https://git.kernel.org/tip/243384dd25c8ea721c5c82a229eaf33cbd1bfd52
Author: Adrian Hunter <adrian.hunter@intel.com>
AuthorDate: Tue, 6 Aug 2019 11:46:06 +0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 14 Aug 2019 10:59:59 -0300
perf intel-pt: Add brief documentation for PEBS via Intel PT
Document how to select PEBS via Intel PT and how to display synthesized
PEBS samples.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190806084606.4021-8-alexander.shishkin@linux.intel.com
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
[ Update the example to use a group with intel_pt// as the group leader, as per Alex comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/intel-pt.txt | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/tools/perf/Documentation/intel-pt.txt b/tools/perf/Documentation/intel-pt.txt
index 50c5b60101bd..e0d9e7dd4f17 100644
--- a/tools/perf/Documentation/intel-pt.txt
+++ b/tools/perf/Documentation/intel-pt.txt
@@ -919,3 +919,18 @@ amended to take the number of elements as a parameter.
Note there is currently no advantage to using Intel PT instead of LBR, but
that may change in the future if greater use is made of the data.
+
+
+PEBS via Intel PT
+=================
+
+Some hardware has the feature to redirect PEBS records to the Intel PT trace.
+Recording is selected by using the aux-output config term e.g.
+
+ perf record -c 10000 -e '{intel_pt/branch=0/,cycles/aux-output/ppp}' uname
+
+Note that currently, software only supports redirecting at most one PEBS event.
+
+To display PEBS events from the Intel PT trace, use the itrace 'o' option e.g.
+
+ perf script --itrace=oe
next prev parent reply other threads:[~2019-08-15 9:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 8:45 [PATCH v6 0/7] perf, intel: Add support for PEBS output to Intel PT Alexander Shishkin
2019-08-06 8:46 ` [PATCH v6 1/7] perf: Allow normal events to output AUX data Alexander Shishkin
2019-08-28 13:30 ` [tip: perf/core] " tip-bot2 for Alexander Shishkin
2019-08-06 8:46 ` [PATCH v6 2/7] perf/x86/intel: Support PEBS output to PT Alexander Shishkin
2019-08-28 13:30 ` [tip: perf/core] " tip-bot2 for Alexander Shishkin
2019-08-06 8:46 ` [PATCH v6 3/7] perf tools: Add aux_output attribute flag Alexander Shishkin
2019-08-15 9:30 ` [tip:perf/core] " tip-bot for Adrian Hunter
2019-08-06 8:46 ` [PATCH v6 4/7] perf tools: Add itrace option 'o' to synthesize aux-output events Alexander Shishkin
2019-08-15 9:30 ` [tip:perf/core] " tip-bot for Adrian Hunter
2019-08-06 8:46 ` [PATCH v6 5/7] perf intel-pt: Process options for PEBS event synthesis Alexander Shishkin
2019-08-15 9:31 ` [tip:perf/core] " tip-bot for Adrian Hunter
2019-08-06 8:46 ` [PATCH v6 6/7] perf tools: Add aux-output config term Alexander Shishkin
2019-08-15 9:32 ` [tip:perf/core] " tip-bot for Adrian Hunter
2019-08-06 8:46 ` [PATCH v6 7/7] perf intel-pt: Add brief documentation for PEBS via Intel PT Alexander Shishkin
2019-08-13 13:51 ` Arnaldo Carvalho de Melo
2019-08-13 14:05 ` Alexander Shishkin
2019-08-13 14:14 ` Arnaldo Carvalho de Melo
2019-08-13 16:21 ` Alexander Shishkin
2019-08-15 9:33 ` tip-bot for Adrian Hunter [this message]
2019-08-06 14:30 ` [PATCH v6 0/7] perf, intel: Add support for PEBS output to " Peter Zijlstra
2019-08-06 14:43 ` Arnaldo Carvalho de Melo
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