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perf record: Add --buildid-all option 

The --buildid-all option is to record build-id of all DSOs in the file.
It might be very costly to postprocess samples to find which DSO hits.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1452519429-31779-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2016-01-11 22:37:09 +09:00 committed by Arnaldo Carvalho de Melo
parent 24b1e5d7f5
commit 6156681b73
2 changed files with 23 additions and 6 deletions
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3
tools/perf/Documentation/perf-record.txt
View File

@ -338,6 +338,9 @@ Options passed to clang when compiling BPF scriptlets.
Specify vmlinux path which has debuginfo.
(enabled when BPF prologue is on)
--buildid-all::
Record build-id of all DSOs regardless whether it's actually hit or not.
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]

26
tools/perf/builtin-record.c
View File

@ -50,6 +50,7 @@ struct record {
int realtime_prio;
bool no_buildid;
bool no_buildid_cache;
bool buildid_all;
unsigned long long samples;
};
@ -362,6 +363,13 @@ static int process_buildids(struct record *rec)
*/
symbol_conf.ignore_vmlinux_buildid = true;
/*
* If --buildid-all is given, it marks all DSO regardless of hits,
* so no need to process samples.
*/
if (rec->buildid_all)
rec->tool.sample = NULL;
return perf_session__process_events(session);
}
@ -756,12 +764,8 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
if (!rec->no_buildid) {
process_buildids(rec);
/*
* We take all buildids when the file contains
* AUX area tracing data because we do not decode the
* trace because it would take too long.
*/
if (rec->opts.full_auxtrace)
if (rec->buildid_all)
dsos__hit_all(rec->session);
}
perf_session__write_header(rec->session, rec->evlist, fd, true);
@ -1138,6 +1142,8 @@ struct option __record_options[] = {
"options passed to clang when compiling BPF scriptlets"),
OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
"Record build-id of all DSOs regardless of hits"),
OPT_END()
};
@ -1255,6 +1261,14 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
if (err)
goto out_symbol_exit;
/*
* We take all buildids when the file contains
* AUX area tracing data because we do not decode the
* trace because it would take too long.
*/
if (rec->opts.full_auxtrace)
rec->buildid_all = true;
if (record_opts__config(&rec->opts)) {
err = -EINVAL;
goto out_symbol_exit;