linux-kernel - Re: [PATCH 06/13] perf tools: Try to show pretty printed output for dynamic sort keys

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Date:	Mon, 4 Jan 2016 12:16:26 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 06/13] perf tools: Try to show pretty printed output for
 dynamic sort keys

Em Wed, Dec 23, 2015 at 02:07:03AM +0900, Namhyung Kim escreveu:
> Each tracepoint event has format string for print to improve
> readability.  Try to parse the output and match the field name.  If it
> finds one, use that for the result.  If not, fallbacks to the original
> output.
> 
> For example, sort on kmem:kmalloc.gfp_flags looks like below:
> (Note: libtraceevent plugins are not installed on my system.  They might
> affect the output below)
> 
> Before:
>   # Overhead  Command   gfp_flags
>   # ........  .......  ..........
>   #
>       99.89%  perf          32848
>        0.06%  sleep           208
>        0.03%  perf          32976
>        0.01%  perf            208
> 
> After:
>   # Overhead  Command            gfp_flags
>   # ........  .......  ...................
>   #
>       99.89%  perf       GFP_NOFS|GFP_ZERO
>        0.06%  sleep             GFP_KERNEL
>        0.03%  perf     GFP_KERNEL|GFP_ZERO
>        0.01%  perf              GFP_KERNEL
> 
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/util/hist.c |   1 +
>  tools/perf/util/sort.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++---
>  tools/perf/util/sort.h |   1 +
>  3 files changed, 102 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
> index c0c92a3daa69..ef1a4a5cc610 100644
> --- a/tools/perf/util/hist.c
> +++ b/tools/perf/util/hist.c
> @@ -978,6 +978,7 @@ void hist_entry__delete(struct hist_entry *he)
>  	if (he->srcfile && he->srcfile[0])
>  		free(he->srcfile);
>  	free_callchain(he->callchain);
> +	free(he->trace_output);
>  	free(he);
>  }

This clashed with an updated patch earlier in this this patchkit
("[PATCH v4.1 02/13] perf hist: Save raw_data/size for tracepoint events"),
fixing it.

- Arnaldo
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