linux-kernel - Re: KVM usability

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Date:	Sun, 7 Mar 2010 11:56:26 +0200
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Avi Kivity <avi@...hat.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

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).

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.

                        Pekka
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