linux-kernel - Re: usb-storage nice value

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Date:	Thu, 17 May 2007 11:19:01 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	DervishD <lkml@...vishd.net>
Cc:	Linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: usb-storage nice value

>     My system is a bit modest: a 7 years old motheboard with VIA686B, a
> 1900+ Athlon XP, but with plenty of RAM (1280MB + 1GB swap). I know, if
> I want more hard disk performance I should buy a new box with SATA or
> whatever, but the fact is that I hadn't problems with the same hardware
> and kernel 2.4.x. I need 2.6.x, so I cannot go back to 2.4.x.

Disk is actually less likely to be a problem than PCI bus bandwidth - the
older VIA boards seem quite happy to fill the PCI bus solid during bursts
of disk I/O

> bad idea too, where should I look for culprits so I can tweak the system
> a bit and improve disk performance? I'm not 100% sure that the problem

You might want to try the reverse if you have a UDMA100 or UDMA133 drive
then setting the speed down to UDMA66 definitely evens out the behaviour
of VIA boards when doing video capture. I don't know if it helps playback.

Alan
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