[PATCH V3 03/25] perf report: Add Instruction Tracing support

Adrian Hunter
2015-04-24T19:39:20Z

Add support for decoding an AUX area assuming
it contains instruction tracing data.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/Documentation/perf-report.txt | 27 +++++++++++++++++++++++++++
tools/perf/builtin-report.c | 11 +++++++++++
2 files changed, 38 insertions(+)

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 4879cf6..4034ec7 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -323,6 +323,33 @@ OPTIONS
--header-only::
Show only perf.data header (forces --stdio).

+--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]
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 476cdf7..625c913 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -36,6 +36,8 @@
#include "util/data.h"
#include "arch/common.h"

+#include "util/auxtrace.h"
+
#include <dlfcn.h>
#include <linux/bitmap.h>

@@ -585,6 +587,7 @@ parse_percent_limit(const struct option *opt, const char *str,
int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_session *session;
+ struct itrace_synth_opts itrace_synth_opts = {0};
struct stat st;
bool has_br_stack = false;
int branch_mode = -1;
@@ -607,6 +610,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
.attr = perf_event__process_attr,
.tracing_data = perf_event__process_tracing_data,
.build_id = perf_event__process_build_id,
+ .id_index = perf_event__process_id_index,
+ .auxtrace_info = perf_event__process_auxtrace_info,
+ .auxtrace = perf_event__process_auxtrace,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
@@ -717,6 +723,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
"Don't show entries under that percent", parse_percent_limit),
OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
"how to display percentage of filtered entries", parse_filter_percentage),
+ OPT_CALLBACK_OPTARG('Z', "itrace", &itrace_synth_opts, NULL, "opts",
+ "Instruction Tracing options",
+ itrace_parse_synth_opts),
OPT_END()
};
struct perf_data_file file = {
@@ -761,6 +770,8 @@ repeat:
report.queue_size);
}

+ session->itrace_synth_opts = &itrace_synth_opts;
+
report.session = session;

has_br_stack = perf_header__has_feat(&session->header,
--
1.9.1