linux-kernel - Re: [PATCH 38/41] perf session: Add perf_session__deliver_synth

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Date:	Tue, 15 Jul 2014 12:17:56 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 38/41] perf session: Add
 perf_session__deliver_synth_event()

Em Mon, Jul 14, 2014 at 01:03:02PM +0300, Adrian Hunter escreveu:
> Add a function to deliver synthesized events from
> within a session.

Why not put this in perf_session_deliver_event (and fix its naming,
renaming it to perf_session__deliver_event)?

The way you did makes me wonder why you want to fallback to
perf_session_deliver_event, i.e. would a normal event come thru a
function which name implies it should be used only for synth events?

Also that events_stats__inc() looks suspicious there :-\

- Arnaldo
 
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
>  tools/perf/util/session.c | 14 ++++++++++++++
>  tools/perf/util/session.h |  5 +++++
>  2 files changed, 19 insertions(+)
> 
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> index 708e1c1..433884c 100644
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -1066,6 +1066,20 @@ static s64 perf_session__process_user_event(struct perf_session *session,
>  	}
>  }
>  
> +int perf_session__deliver_synth_event(struct perf_session *session,
> +				      union perf_event *event,
> +				      struct perf_sample *sample,
> +				      struct perf_tool *tool)
> +{
> +	events_stats__inc(&session->stats, event->header.type);
> +
> +	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
> +		return perf_session__process_user_event(session, event, tool,
> +							0);
> +
> +	return perf_session_deliver_event(session, event, sample, tool, 0);
> +}
> +
>  static void event_swap(union perf_event *event, bool sample_id_all)
>  {
>  	perf_event__swap_op swap;
> diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
> index 39327ca..86f1bb4 100644
> --- a/tools/perf/util/session.h
> +++ b/tools/perf/util/session.h
> @@ -130,6 +130,11 @@ extern volatile int session_done;
>  
>  #define session_done()	(*(volatile int *)(&session_done))
>  
> +int perf_session__deliver_synth_event(struct perf_session *session,
> +				      union perf_event *event,
> +				      struct perf_sample *sample,
> +				      struct perf_tool *tool);
> +
>  int perf_event__process_id_index(struct perf_tool *tool,
>  				 union perf_event *event,
>  				 struct perf_session *session);
> -- 
> 1.8.3.2
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