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From: Etaoin Shrdlu <shrdlu@unlimitedmail.org>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Performance problem at writing big files and Multitasking
Date: Tue, 6 Feb 2007 22:16:45 +0100	[thread overview]
Message-ID: <200702062216.45220.shrdlu@unlimitedmail.org> (raw)
In-Reply-To: <6142e6140702061231x5a517c2fvf29f87efacb2f576@mail.gmail.com>

On Tuesday 6 February 2007 21:31, Daniel Pielmeier wrote:

> On the other i recently recognized when i doing some video editing
> i.e. demultiplex the movie with projectx which shows the speed of
> writing video and audio to the disk. It writes about 200MB with about
> 25MB/s then it halts for about 2-3 seconds and starts again writing
> data to the disk, after another 200MB it halts again and starts over
> again and so on. I also recognize the same behavior when i multiplex
> the video and audio together with mplex. What could cause this
> problems

What I/O scheduler are you using? Did you try to experiment with the 
deadline or the cfq I/O schedulers?
If you have them enabled in your kernel config, read 
Documentation/block/switching-sched.txt and see if things get better 
after changing the I/O scheduler for your hard disk.
Of course, your problem might be caused by something else altogether.
-- 
gentoo-user@gentoo.org mailing list



  parent reply	other threads:[~2007-02-06 20:58 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-06 20:31 [gentoo-user] Performance problem at writing big files and Multitasking Daniel Pielmeier
2007-02-06 20:50 ` Michael Schreckenbauer
2007-02-06 21:25   ` Daniel Pielmeier
2007-02-06 21:16 ` Etaoin Shrdlu [this message]
2007-02-06 21:28   ` Daniel Pielmeier
2007-02-08 10:42     ` Frédéric Grosshans
2007-02-08 18:34       ` Daniel Pielmeier
2007-02-08 19:12         ` Etaoin Shrdlu
2007-02-08 23:14       ` Iain Buchanan
2007-02-06 22:25   ` Daniel Pielmeier
2007-02-07 12:59   ` Daniel Pielmeier
2007-02-07 19:16     ` Tom Naujokas
     [not found] <7LFgI-6qK-17@gated-at.bofh.it>
     [not found] ` <7LFqt-6Eo-27@gated-at.bofh.it>
     [not found]   ` <7LUIK-4Qn-3@gated-at.bofh.it>
2007-02-07 16:00     ` Mike
2007-02-07 16:39       ` Daniel Pielmeier
2007-02-07 18:08       ` Benno Schulenberg
2007-02-07 21:39       ` Daniel Pielmeier
2007-02-10 11:49         ` Daniel Pielmeier
2007-02-26 16:28           ` Matthias Bethke
2007-02-27  7:49             ` Kellystewart00

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