From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, kan.liang@linux.intel.com,
Adrian Hunter <adrian.hunter@intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>
Subject: [PATCH v3 7/7] perf intel-pt: Add brief documentation for PEBS via Intel PT
Date: Wed, 31 Jul 2019 17:30:41 +0300 [thread overview]
Message-ID: <20190731143041.64678-8-alexander.shishkin@linux.intel.com> (raw)
In-Reply-To: <20190731143041.64678-1-alexander.shishkin@linux.intel.com>
From: Adrian Hunter <adrian.hunter@intel.com>
Document how to select PEBS via Intel PT and how to display synthesized
PEBS samples.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.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..8c40f898685b 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-source config term e.g.
+
+ perf record -c 10000 -e cycles/aux-source/ppp -e intel_pt/branch=0/ 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
--
2.20.1
prev parent reply other threads:[~2019-07-31 14:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 14:30 [PATCH v3 0/7] perf, intel: Add support for PEBS output to Intel PT Alexander Shishkin
2019-07-31 14:30 ` [PATCH v3 1/7] perf: Allow normal events to be sources of AUX data Alexander Shishkin
2019-07-31 16:16 ` Peter Zijlstra
2019-07-31 16:21 ` Peter Zijlstra
2019-07-31 14:30 ` [PATCH v3 2/7] perf/x86/intel: Support PEBS output to PT Alexander Shishkin
2019-07-31 16:50 ` Peter Zijlstra
2019-07-31 14:30 ` [PATCH v3 3/7] perf tools: Add aux_source attribute flag Alexander Shishkin
2019-07-31 14:30 ` [PATCH v3 4/7] perf tools: Add itrace option 'o' to synthesize aux-source events Alexander Shishkin
2019-07-31 14:30 ` [PATCH v3 5/7] perf intel-pt: Process options for PEBS event synthesis Alexander Shishkin
2019-07-31 14:30 ` [PATCH v3 6/7] perf tools: Add aux-source config term Alexander Shishkin
2019-07-31 14:30 ` Alexander Shishkin [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190731143041.64678-8-alexander.shishkin@linux.intel.com \
--to=alexander.shishkin@linux.intel.com \
--cc=a.p.zijlstra@chello.nl \
--cc=acme@redhat.com \
--cc=adrian.hunter@intel.com \
--cc=kan.liang@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).