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Commit 7a680eb9 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf script: Add Instruction Tracing support 



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

Signed-off-by: default avatarAdrian 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/1428594864-29309-17-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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent cfe9174f

tools/perf/Documentation/perf-script.txt

+27 −0
Original line number Diff line number Diff line
@@ -221,6 +221,33 @@ OPTIONS 
--header-only

	Show only perf.data header.



--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-record[1], linkperf:perf-script-perl[1],

tools/perf/builtin-script.c

+11 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include "util/evsel.h"

#include "util/sort.h"

#include "util/data.h"

#include "util/auxtrace.h"

#include <linux/bitmap.h>



static char const		*script_name;
@@ -1497,6 +1498,7 @@ 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 = { .set = false, };

	char *script_path = NULL;

	const char **__argv;

	int i, j, err = 0;
@@ -1511,6 +1513,10 @@ 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,

			.auxtrace_info	 = perf_event__process_auxtrace_info,

			.auxtrace	 = perf_event__process_auxtrace,

			.auxtrace_error	 = perf_event__process_auxtrace_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) 
	OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,

		    "Show the mmap events"),

	OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),

	OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",

			    "Instruction Tracing options",

			    itrace_parse_synth_opts),

	OPT_END()

	};

	const char * const script_subcommands[] = { "record", "report", NULL };
@@ -1765,6 +1774,8 @@ 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)