linux-kernel - Re: [PATCH V3 05/25] perf tools: Hit all build ids when AUX area tracing

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Date:	Tue, 28 Apr 2015 14:45:32 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH V3 05/25] perf tools: Hit all build ids when AUX area
 tracing

On Fri, Apr 24, 2015 at 10:29:47PM +0300, Adrian Hunter wrote:
> We need to include all buildids when a perf.data
> file contains AUX area tracing data because we
> do not decode the trace for that purpose because
> it would take too long.
> 
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
>  tools/perf/builtin-buildid-list.c |  9 +++++++++
>  tools/perf/builtin-inject.c       |  8 +++++++-
>  tools/perf/builtin-record.c       | 10 +++++++++-
>  3 files changed, 25 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
> index feb420f..9fe93c8 100644
> --- a/tools/perf/builtin-buildid-list.c
> +++ b/tools/perf/builtin-buildid-list.c
> @@ -69,6 +69,15 @@ static int perf_session__list_build_ids(bool force, bool with_hits)
>  	session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
>  	if (session == NULL)
>  		return -1;
> +
> +	/*
> +	 * 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 (!perf_data_file__is_pipe(&file) &&
> +	    perf_header__has_feat(&session->header, HEADER_AUXTRACE))
> +		with_hits = false;

when there's auxtrace in the perf.data, all the dsos would have
hits (as per builtin-record.c change below) and be display anyway,
so it seems we dont need this hunk?

jirka

SNIP

>  		 * synthesized hardware events, so clear the feature flag.
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index c8c784c..4d0ebbb 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -620,8 +620,16 @@ out_child:
>  	if (!err && !file->is_pipe) {
>  		rec->session->header.data_size += rec->bytes_written;
>  
> -		if (!rec->no_buildid)
> +		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)
> +				dsos__hit_all(rec->session);
> +		}
>  		perf_session__write_header(rec->session, rec->evlist, fd, true);
>  	}
>  
> -- 
> 1.9.1
> 
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