linux-kernel - Re: KVM usability

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Date:	Sun, 07 Mar 2010 12:11:45 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
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 11:56 AM, Pekka Enberg wrote:
> Hi Avi,
>
> (slightly off-topic)
>
> On Sun, Mar 7, 2010 at 11:35 AM, Avi Kivity<avi@...hat.com>  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'.
>>      
> People keep bringing this up but I don't quite agree. Mac OS X has
> "shark" which is pretty much what you describe above. However, having
> used both, I prefer perf's simple UI for two reasons: it's much easier
> to automate perf commands and text-based reports are superior for
> sharing results (and keeping track of results when doing performance
> optimizations).
>    

Yes, you (and me as well).  But most people are quite unlike new and 
me.  There's a reason GUIs dominate today, and there are even a few 
kernel developers that don't use mutt for reading email.

Even for command-line-happy people, GUIs still have an advantage in that 
it is much easier to discover features by exploring the UI vs. reading 
manual pages.

> That said, AFAICT, it should be pretty simple to implement a
> shark-like UI with GTK as current perf code is pretty good fit for
> that. I've pondered about doing that myself but quite frankly, I don't
> see any big gains in that.
>    

Because you are only interested in your own itches (which is perfectly 
legitimate, but will keep perf's userbase down).

-- 
error compiling committee.c: too many arguments to function

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