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

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Message-ID: <20140724155843.GE25165@krava.brq.redhat.com>
Date:	Thu, 24 Jul 2014 17:58:44 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...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

On Fri, Jul 25, 2014 at 12:41:15AM +0900, Namhyung Kim wrote:
> Hi guys,
> 
> On Thu, Jul 24, 2014 at 11:49 PM, Jiri Olsa <jolsa@...hat.com> wrote:
> > On Thu, Jul 24, 2014 at 10:57:47AM -0300, Arnaldo Carvalho de Melo wrote:
> >> 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?
> >
> > yep, it's just for header.. let's see Namhyung might have better
> > idea how to handle this problem
> 
> I think it still needs to be left-aligned.  So I'd rather change the
> order - i.e. "Pid: Command".  Is it okay for you?

yes, jirka
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