linux-kernel - Re: [PATCH 03/14] perf tool: Fix period symbol_conf.field

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Date:	Thu, 29 Nov 2012 12:53:44 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 03/14] perf tool: Fix period symbol_conf.field_sep display

On Thu, Nov 29, 2012 at 04:56:04PM +0900, Namhyung Kim wrote:
> On Wed, 28 Nov 2012 14:52:38 +0100, Jiri Olsa wrote:
> > Currently we don't properly display hist data with
> > symbol_conf.field_sep separator. We need to display
> > either space or separator.
> >
> > Signed-off-by: Jiri Olsa <jolsa@...hat.com>
> > Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
> > Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> > Cc: Ingo Molnar <mingo@...e.hu>
> > Cc: Paul Mackerras <paulus@...ba.org>
> > Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
> > Cc: Frederic Weisbecker <fweisbec@...il.com>
> > Cc: Namhyung Kim <namhyung@...nel.org>
> > ---
> >  tools/perf/ui/hist.c | 8 ++------
> >  1 file changed, 2 insertions(+), 6 deletions(-)
> >
> > diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
> > index 5452960..20a4392 100644
> > --- a/tools/perf/ui/hist.c
> > +++ b/tools/perf/ui/hist.c
> > @@ -523,17 +523,13 @@ int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
> >  	struct perf_hpp_fmt *fmt;
> >  	char *start = hpp->buf;
> >  	int ret;
> > -	bool first = true;
> >  
> >  	if (symbol_conf.exclude_other && !he->parent)
> >  		return 0;
> >  
> >  	perf_hpp__for_each_format(fmt) {
> > -		if (!sep || !first) {
> > -			ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
> > -			advance_hpp(hpp, ret);
> > -			first = false;
> > -		}
> > +		ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
> > +		advance_hpp(hpp, ret);
> 
> It will display the separator even before the first column so that the
> output can be messed up with this.  I can see that there's a bug setting
> 'first' to false - the line should be moved out of the block otherwise
> it's pointless since we cannot enter the block.

hum, I'll retest

thanks,
jirka
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