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perf record: Add --buildid-all option

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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. Specify vmlinux path which has debuginfo.
(enabled when BPF prologue is on) (enabled when BPF prologue is on)
--buildid-all::
Record build-id of all DSOs regardless whether it's actually hit or not.
SEE ALSO SEE ALSO
-------- --------
linkperf:perf-stat[1], linkperf:perf-list[1] 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; int realtime_prio;
bool no_buildid; bool no_buildid;
bool no_buildid_cache; bool no_buildid_cache;
bool buildid_all;
unsigned long long samples; unsigned long long samples;
}; };
@ -362,6 +363,13 @@ static int process_buildids(struct record *rec)
*/ */
symbol_conf.ignore_vmlinux_buildid = true; 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); return perf_session__process_events(session);
} }
@ -756,12 +764,8 @@ out_child:
if (!rec->no_buildid) { if (!rec->no_buildid) {
process_buildids(rec); process_buildids(rec);
/*
* We take all buildids when the file contains if (rec->buildid_all)
* AUX area tracing data because we do not decode the
* trace because it would take too long.
*/
if (rec->opts.full_auxtrace)
dsos__hit_all(rec->session); dsos__hit_all(rec->session);
} }
perf_session__write_header(rec->session, rec->evlist, fd, true); 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"), "options passed to clang when compiling BPF scriptlets"),
OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"), "file", "vmlinux pathname"),
OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
"Record build-id of all DSOs regardless of hits"),
OPT_END() OPT_END()
}; };
@ -1255,6 +1261,14 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
if (err) if (err)
goto out_symbol_exit; 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)) { if (record_opts__config(&rec->opts)) {
err = -EINVAL; err = -EINVAL;
goto out_symbol_exit; goto out_symbol_exit;