From: Adrian Hunter <adrian.hun...@intel.com> Document how to select PEBS via Intel PT and how to display synthesized PEBS samples.
Signed-off-by: Adrian Hunter <adrian.hun...@intel.com> Signed-off-by: Alexander Shishkin <alexander.shish...@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
