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perf script: 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/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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-04-09 18:53:56 +03:00 committed by Arnaldo Carvalho de Melo
parent cfe9174fcf
commit 7a680eb990
2 changed files with 38 additions and 0 deletions
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27
tools/perf/Documentation/perf-script.txt
View File

@ -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],

11
tools/perf/builtin-script.c
View File

@ -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)