linux-kernel - Re: unresponsiveness on linux desktop during file copy

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Message-ID: <93655eb70905152352n6f82ef9dubb9b36e5be161ac7@mail.gmail.com>
Date:	Sat, 16 May 2009 12:22:09 +0530
From:	Satish Eerpini <eerpini@...il.com>
To:	Mark Knecht <markknecht@...il.com>
Cc:	Rik van Riel <riel@...hat.com>, Ray Lee <ray-lk@...rabbit.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: unresponsiveness on linux desktop during file copy

> Do you believe this was working better on an earlier kernel? If so you
> might drop back and see if these commands work better. If so that
> would suggest a regression of some type.

I remember good performance with 2.6.26.x series, ... but I could not
try that out, ,... things on a 2.6.27.23 kernel seem no better :

Linux 2.6.27.23 (satish) 	05/16/2009

12:11:18 PM     CPU     %user     %nice   %system   %iowait    %steal     %idle
12:11:21 PM     all      0.00      0.00      3.92     75.65      0.00     20.42
12:11:24 PM     all      0.00      0.00      3.55     67.85      0.00     28.59
12:11:27 PM     all      0.16      0.00      4.51     45.09      0.00     50.24
12:11:30 PM     all      0.00      0.00      3.59     44.77      0.00     51.63
12:11:33 PM     all      0.16      0.00      5.25     82.51      0.00     12.08
Average:        all      0.06      0.00      4.17     63.24      0.00     32.53

the average disk speed was about 10.5 MB/s, indeed the average IOWAIT
is more than that in the latest kernel, I will see if I can test it on
a 2.6.26.x kernel or earlier one and send you guys the stats.

Cheers
satish
-- 
http://satish.playdrupal.com
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