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authorAdrian Hunter <adrian.hunter@intel.com>2015-04-24 22:29:45 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-04 12:43:50 -0300
commit520a2ebc2f0bd46b65feb7ca73a9ed65ea1a36bd (patch)
treea2fe714afdce647f1642bb5fe82752d98876c5e7 /tools/perf/Documentation/perf-report.txt
parent6d5cdd64f314e03c8606c777dc44b09769f8e038 (diff)
downloadlinux-520a2ebc2f0bd46b65feb7ca73a9ed65ea1a36bd.tar.gz
perf report: Add Instruction Tracing support
Add support for decoding an AUX area assuming it contains instruction tracing data. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1429903807-20559-4-git-send-email-adrian.hunter@intel.com [ Do not use -Z as an alternative to --itrace ] [ Fixed initialization of itrace_synth_opts struct fields on older gcc versions ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-report.txt')
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diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 896672badba3..b66f6b41b179 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -327,6 +327,33 @@ OPTIONS
include::callchain-overhead-calculation.txt[]
+--itrace::
+ Options for decoding instruction tracing data. The options are:
+
+ i synthesize instructions events
+ b synthesize branches events
+ c synthesize branches events (calls only)
+ r synthesize branches events (returns only)
+ e synthesize error events
+ d create a debug log
+ g synthesize a call chain for instructions events
+
+ The default is all events i.e. the same as --itrace=ibe
+
+ In addition, the period (default 100000) for instructions events
+ can be specified in units of:
+
+ i instructions
+ t ticks
+ ms milliseconds
+ us microseconds
+ ns nanoseconds (default)
+
+ Also the call chain size (default 16, max. 1024) for instructions
+ events can be specified.
+
+ To disable decoding entirely, use --no-itrace.
+
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-annotate[1]