linux-kernel - Re: [PATCH 4/6] perf report: Honor column width setting

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Date:	Thu, 24 Jul 2014 10:57:47 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/6] perf report: Honor column width setting

Em Thu, Jul 24, 2014 at 02:57:51PM +0200, Jiri Olsa escreveu:
> On Wed, Jul 09, 2014 at 02:28:12PM +0900, Namhyung Kim wrote:
> > Set column width and do not change it if user gives -w/--column-widths
> > option.  It'll truncate longer symbols than the width if exists.
> 
> SNIP
> 
> > --- a/tools/perf/util/sort.c
> > +++ b/tools/perf/util/sort.c
> > @@ -70,7 +70,9 @@ static int hist_entry__thread_snprintf(struct hist_entry *he, char *bf,
> >  				       size_t size, unsigned int width)
> >  {
> >  	const char *comm = thread__comm_str(he->thread);
> > -	return repsep_snprintf(bf, size, "%-*s:%5d", width - 6,
> > +
> > +	width = max(7U, width) - 6;
> > +	return repsep_snprintf(bf, size, "%-*.*s:%5d", width, width,
> >  			       comm ?: "", he->thread->tid);
> >  }
> 
> also we now print out all sort headers left alligned, which is wrong for
> sort_thread header: "Command:  Pid' that mirrors value strings with ':'
> being aligned
> 
> maybe something like in attached patch..?
> 
> thanks,
> jirka
> 
> 
> ---
> diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> index f89714329c0f..fbbe86b7f63c 100644
> --- a/tools/perf/util/sort.c
> +++ b/tools/perf/util/sort.c
> @@ -78,6 +78,7 @@ static int hist_entry__thread_snprintf(struct hist_entry *he, char *bf,
>  
>  struct sort_entry sort_thread = {
>  	.se_header	= "Command:  Pid",
> +	.se_header_right= true,

Is this just for the header? Perhaps its more clearly named .se_right_justify?

>  	.se_cmp		= sort__thread_cmp,
>  	.se_snprintf	= hist_entry__thread_snprintf,
>  	.se_width_idx	= HISTC_THREAD,
> @@ -1212,13 +1213,17 @@ static int __sort__hpp_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
>  {
>  	struct hpp_sort_entry *hse;
>  	size_t len = fmt->user_len;
> +	const char *fmt_str = "%-*.*s";
>  
>  	hse = container_of(fmt, struct hpp_sort_entry, hpp);
>  
>  	if (!len)
>  		len = hists__col_len(&evsel->hists, hse->se->se_width_idx);
>  
> -	return scnprintf(hpp->buf, hpp->size, "%-*.*s", len, len, hse->se->se_header);
> +	if (hse->se->se_header_right)
> +		fmt_str = "%*.*s";
> +
> +	return scnprintf(hpp->buf, hpp->size, fmt_str, len, len, hse->se->se_header);
>  }
>  
>  static int __sort__hpp_width(struct perf_hpp_fmt *fmt,
> diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
> index 041f0c9cea2b..16a07b9b16c2 100644
> --- a/tools/perf/util/sort.h
> +++ b/tools/perf/util/sort.h
> @@ -197,6 +197,7 @@ struct sort_entry {
>  	struct list_head list;
>  
>  	const char *se_header;
> +	bool se_header_right;
>  
>  	int64_t (*se_cmp)(struct hist_entry *, struct hist_entry *);
>  	int64_t (*se_collapse)(struct hist_entry *, struct hist_entry *);
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