linux-kernel - Re: KVM usability

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Message-ID: <4B93ED7A.6070204@redhat.com>
Date:	Sun, 07 Mar 2010 20:16:26 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Luca Barbieri <luca.barbieri@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, Zachary Amsden <zamsden@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Anthony Liguori <anthony@...emonkey.ws>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>, ming.m.lin@...el.com,
	sheng.yang@...el.com, Jes Sorensen <Jes.Sorensen@...hat.com>,
	KVM General <kvm@...r.kernel.org>,
	Gleb Natapov <gleb@...hat.com>,
	Fr??d??ric Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: KVM usability

On 03/07/2010 05:14 PM, Luca Barbieri wrote:
>> perf really is wonderful, but to be really competitive, and usable to more
>> developers, it needs to be in a graphical environment.  I want 'perf report'
>> output to start out collapsed and drill down by clicking on a tree widget.
>>   Clicking on a function name opens its definition.  'perf annotate' should
>> display annotations on my editor window, not in a pager.  I should be able
>> to check events on a list, not using 'perf list'.
>>
>> Is something like that suitable for tools/perf/?  I think you'll find the
>> intersection of kernel developers and GUI developers to be fairly small.
>>      
> The latest versions of Gnome Sysprof use perf and provide a GTK+ tree
> interface for the profiling output.
>
> However, they are not configurable at all and don't support anything
> but call graph profiling, unless they added more features very
> recently.
> It would be nice to extend sysprof into a more capable tool, and one
> that can read perf output files and do so when launched from the
> command line.
>    

Looks like a step in the right direction.  I don't think this belong in 
tools/, though.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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