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Date: Sat, 4 Dec 2010 23:55:57 +0000
Message-ID: <AANLkTimmZE0QROje3vLKJOa+uVFfNqiGNF_MJ9vt9xHW@mail.gmail.com>
Subject: Re: [PATCH v4] sched: automated per session task groups
From: James Courtier-Dutton <james.dutton@gmail.com>
To: Paul Turner <pjt@google.com>
Cc: Mike Galbraith <efault@gmx.de>, Ingo Molnar <mingo@elte.hu>,
        Oleg Nesterov <oleg@redhat.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>
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On 3 December 2010 05:11, Paul Turner <pjt@google.com> wrote:
>
> I actually don't have a desktop setup handy to test "interactivity" (sad but
> true -- working on grabbing one).  But it looks better on under synthetic
> load.
>

What tools are actually used to test "interactivity" ?
I posted a tool to the list some time ago, but I don't think anyone noticed.
My tool is very simple.
When you hold a key down, it should repeat. It should repeat at a
constant predictable interval.
So, my tool just waits for key presses and times when each one occurred.
The tester simply presses a key and holds it down.
If the time between each key press is constant, it indicates good
"interactivity". If the time between each key press varies a lot, it
indicates bad "interactivity".
You can reliably test if one kernel is better than the next using
actual measurable figures.

Kind Regards

James
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