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SubjectRe: [PATCH RESEND] perf record: Add --buildid-all option
Em Mon, Jan 11, 2016 at 10:38:38PM +0900, Namhyung Kim escreveu:
> 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.

Applied.

> Cc: Adrian Hunter <adrian.hunter@intel.com>
> Cc: Andi Kleen <andi@firstfloor.org>
> Cc: Stephane Eranian <eranian@google.com>
> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
> ---
> tools/perf/Documentation/perf-record.txt | 3 +++
> tools/perf/builtin-record.c | 32 ++++++++++++++++++++++++++------
> 2 files changed, 29 insertions(+), 6 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
> index 3a1a32f5479f..fbceb631387c 100644
> --- a/tools/perf/Documentation/perf-record.txt
> +++ b/tools/perf/Documentation/perf-record.txt
> @@ -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]
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index dc4e0adf5c5b..a42cb2955697 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -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 @@ out_child:
>
> 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,
> + "collect build-id of all DSOs regardless of hits"),
> OPT_END()
> };
>
> @@ -1193,6 +1199,12 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
> return -EINVAL;
> }
>
> + if (rec->no_buildid && rec->buildid_all) {
> + parse_options_usage(record_usage, record_options, "B", 1);
> + parse_options_usage(NULL, record_options, "buildid-all", 0);
> + return -EINVAL;
> + }
> +
> if (!rec->itr) {
> rec->itr = auxtrace_record__init(rec->evlist, &err);
> if (err)
> @@ -1255,6 +1267,14 @@ 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;
> --
> 2.6.4

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