linux-kernel - Re: [PATCH 05/10] perf hists: Fixup addr snprintf width on 32 bit arches

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Message-ID: <20100806142945.GC17509@ghostprotocols.net>
Date:	Fri, 6 Aug 2010 11:29:45 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 05/10] perf hists: Fixup addr snprintf width on 32 bit
	arches

Em Thu, Aug 05, 2010 at 06:58:07PM -0700, Joe Perches escreveu:
> On Thu, 2010-08-05 at 22:46 -0300, Arnaldo Carvalho de Melo wrote:
> > From: Arnaldo Carvalho de Melo <acme@...hat.com>
> > By using BITS_PER_LONG/4 as the width specifier.
> []
> > diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> > index 1c61a4f..b62a553 100644
> > --- a/tools/perf/util/sort.c
> > +++ b/tools/perf/util/sort.c
> []
> > -		ret += repsep_snprintf(bf, size, "%#018llx %c ", self->ip, o);
> > +		ret += repsep_snprintf(bf, size, "%*Lx %c ",
> > +				       BITS_PER_LONG / 4, self->ip, o);
> []
> > -		ret += repsep_snprintf(bf + ret, size - ret, "%#016llx", self->ip);
> > +		ret += repsep_snprintf(bf + ret, size - ret, "%*Lx",
> > +				       BITS_PER_LONG / 4, self->ip);
> 
> This drops leading 0's.

Is this a problem? This removes clutter from the output, right?

- Arnaldo
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