[PATCH V2 16/22] perf script: Add Instruction Tracing support

Adrian Hunter
2014-11-20T13:26:11Z

Add support for decoding an Instruction Trace.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/Documentation/perf-script.txt | 28 ++++++++++++++++++++++++++++
tools/perf/builtin-script.c | 11 +++++++++++
2 files changed, 39 insertions(+)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 2149480..f89f3be 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -215,6 +215,34 @@ OPTIONS
--header-only
Show only perf.data header.

+-Z::
+--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 -Zibe
+
+ In addition, the period (default 1000) for instructions events can be
+ specified in units of:
+
+ i instructions (default)
+ t ticks
+ ms milliseconds
+ us microseconds
+ ns nanoseconds
+
+ 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-record[1], linkperf:perf-script-perl[1],
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index ce304df..dbffd00 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -16,6 +16,7 @@
#include "util/evsel.h"
#include "util/sort.h"
#include "util/data.h"
+#include "util/itrace.h"
#include <linux/bitmap.h>

static char const *script_name;
@@ -1505,6 +1506,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
char *rec_script_path = NULL;
char *rep_script_path = NULL;
struct perf_session *session;
+ struct itrace_synth_opts itrace_synth_opts = {0};
char *script_path = NULL;
const char **__argv;
int i, j, err = 0;
@@ -1519,6 +1521,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
.attr = process_attr,
.tracing_data = perf_event__process_tracing_data,
.build_id = perf_event__process_build_id,
+ .id_index = perf_event__process_id_index,
+ .itrace_info = perf_event__process_itrace_info,
+ .itrace = perf_event__process_itrace,
+ .itrace_error = perf_event__process_itrace_error,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
@@ -1570,6 +1576,9 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"Show the fork/comm/exit events"),
OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
"Show the mmap events"),
+ OPT_CALLBACK_OPTARG('Z', "itrace", &itrace_synth_opts, NULL, "opts",
+ "Instruction Tracing options",
+ itrace_parse_synth_opts),
OPT_END()
};
const char * const script_usage[] = {
@@ -1767,6 +1776,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)

script.session = session;

+ session->itrace_synth_opts = &itrace_synth_opts;
+
if (cpu_list) {
err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
if (err < 0)
--
1.9.1