Commit-ID: 243384dd25c8ea721c5c82a229eaf33cbd1bfd52 Gitweb: https://git.kernel.org/tip/243384dd25c8ea721c5c82a229eaf33cbd1bfd52 Author: Adrian Hunter <adrian.hun...@intel.com> AuthorDate: Tue, 6 Aug 2019 11:46:06 +0300 Committer: Arnaldo Carvalho de Melo <a...@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.hun...@intel.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Kan Liang <kan.li...@linux.intel.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/20190806084606.4021-8-alexander.shish...@linux.intel.com Signed-off-by: Alexander Shishkin <alexander.shish...@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 <a...@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
