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authorAdrian Hunter <adrian.hunter@intel.com>2015-09-25 16:15:39 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-09-28 16:53:44 -0300
commit601897b54c7ed492a89b262dccd7c6f7faf12b30 (patch)
treef7044554d8941c84f3aaba56a93122d59d5a7f20 /tools/perf/Documentation/itrace.txt
parent35ca01c117da9b8e5b60204f730cdde414735596 (diff)
downloadlinux-601897b54c7ed492a89b262dccd7c6f7faf12b30.tar.gz
perf auxtrace: Add option to synthesize branch stacks on samples
Add AUX area tracing option 'l' to synthesize branch stacks on samples just like sample type PERF_SAMPLE_BRANCH_STACK. This is taken into use by Intel PT in a subsequent patch. Based-on-patch-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1443186956-18718-9-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/itrace.txt')
-rw-r--r--tools/perf/Documentation/itrace.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt
index 2ff946677e3b..65453f4c7006 100644
--- a/tools/perf/Documentation/itrace.txt
+++ b/tools/perf/Documentation/itrace.txt
@@ -6,6 +6,7 @@
e synthesize error events
d create a debug log
g synthesize a call chain (use with i or x)
+ l synthesize last branch entries (use with i or x)
The default is all events i.e. the same as --itrace=ibxe
@@ -20,3 +21,6 @@
Also the call chain size (default 16, max. 1024) for instructions or
transactions events can be specified.
+
+ Also the number of last branch entries (default 64, max. 1024) for
+ instructions or transactions events can be specified.