linux-kernel - Re: [PATCH 03/14] perf hists: Separate overhead and baseline columns

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Date:	Tue, 2 Oct 2012 15:32:00 +0200
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 hists: Separate overhead and baseline columns

On Fri, Sep 28, 2012 at 02:56:01PM +0900, Namhyung Kim wrote:
> On Thu, 27 Sep 2012 13:09:24 +0200, Jiri Olsa wrote:
> > Currently the overhead and baseline columns are handled within
> > single function and the distinction is made by 'baseline hists'
> > pointer passed by 'struct perf_hpp::ptr'.
> >
> > Since hists pointer is now part of each hist_entry, it's possible
> > to locate paired hists pointer directly from the passed struct
> > hist_entry pointer.
> >
> > Also separating those 2 columns makes the code more obvious.
> 
> Yes, it was thinking about something like this.
> 
> 
> >
> > 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>
> > Signed-off-by: Jiri Olsa <jolsa@...hat.com>
> > ---
> [snip]
> > +static int hpp__color_baseline(struct perf_hpp *hpp, struct hist_entry *he)
> > +{
> > +	double percent = baseline_percent(he);
> > +
> > +	return percent_color_snprintf(hpp->buf, hpp->size, "  %5.2f%%", percent);
> 
> Is it possible to have a baseline value over 100%?  I changed 'overhead'
> colum format from '2 spaces + %5.2f + %' to '1 space + %6.2f + %' for
> the case.  Probably it'd better using it here too for consistency.

I think you're right, I'll make the change

thanks,
jirka
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