linux-kernel - Re: [patch] perf tools: allow top users to switch between weighted and individual counter display

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Message-ID: <20090802200049.GF24486@elte.hu>
Date:	Sun, 2 Aug 2009 22:00:49 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mike Galbraith <efault@....de>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch] perf tools: allow top users to switch between weighted
	and individual counter display


* Mike Galbraith <efault@....de> wrote:

> On Fri, 2009-07-24 at 10:58 +0200, Peter Zijlstra wrote:
> > On Fri, 2009-07-24 at 10:09 +0200, Mike Galbraith wrote:
> > > (depends on last resurrect annotation patch)
> > > 
> > > perf_counter tools: allow top users to switch between weighted and individual counter display.
> > > 
> > > Add [w]eighted hotkey.  Pressing [w] toggles between displaying weighted total of all counters,
> > > and the counter selected via [E]vent select key.
> > 
> > /me stuck it next to that other one, let see what happens ;-)
> 
> (plugs in Bitwolf-9000 charger)

seems to work well here.

A few minor comments:

 - I had to guess that '?' gets me a help screen. Might make sense 
   to display a line at the bottom (?) to give some hints.

 - Once i was on the help screen, i expected either <Enter> or '?' 
   to make it vanish. Only setting an option got rid of it - i 
   suspect this should be improved. (Also, a line in the help screen 
   that tells us how to go back without changing anything would be 
   helpful as well.)

 - I randomly tried the 's' option to do annotation. But it didnt do 
   anything. Probably because i didnt start perf top via --vmlinux, 
   right? This behavior is not intuitive in any case - it should 
   probably display an error message at minimum - but if possible it 
   should try to guess the position of the vmlinux file.

	Ingo
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