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

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Message-ID: <20090517121711.GA3583@localhost>
Date:	Sun, 17 May 2009 20:17:11 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Satish Eerpini <eerpini@...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

On Sun, May 17, 2009 at 08:01:29PM +0800, Satish Eerpini wrote:
> > Hmm, how do you define/feel the unresponsiveness?  Is it related to
> > the currently *running* applications, or opening a *new* application?
> 
> the unresponsiveness is for both the currently running applications
> and for opening new applications, here are some pointers :
> 
> --> during normal operation, swtiching between windows( alt+tab) is
> simultaneous, while during a file copy it takes around 1 second, which
> I think is quite a lag.
> --> Opening a simple application like gnome-terminal takes a second or
> more for sure when there is a file copy going on.
> -->Also a particular window after gaining focus takes a second or so,
> to resume what it was doing, .. so if I am copying a file in a session
> of gnome-terminal and open another session of gnome-terminal and type
> in "clear" it takes around 2 seconds before the screen is cleared on
> the second session,

The clear command can be a big clue. Can you try these commands in the
terminal and show us the two log files?

        strace -o all.log -T clear
        strace -o sum.log -c clear

> this is the case with almost every application and worser with big
> ones like firefox and office. This was the kind of unresponsiveness I
> was talking about.
> 
> Cheers
> Satish
> -- 
> http://satish.playdrupal.com
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