Re: [linux-audio-dev] disk latency under 2.4.19 ll+preempt

[Stefan Nitschke]

From: Maarten de Boer <[EMAIL PROTECTED]>
Date: Wed, 20 Nov 2002 08:29:31 +0100

On 19 Nov 2002 15:29:19 -0500
jfm3 <[EMAIL PROTECTED]> wrote:

> I'm running the low latency and preemption kernel patches on 2.4.19. I'm
> getting disk copy latency of around 10ms. Since I'm a real time person
> (according to M. Goggins) who doesn't use the hd in real time, I can
> live with this, but it bugs me. I've tried ext2 and ext3, no difference.
> Any other tips?

Do you have support for your chipset unabled under "IDE, ATA and ATAPI
Block devices" in your kernel configuration, and "Use PCI DMA by default
when available"? I believe this is rather important.

On my asus A7V266-E board i had to set down dma mode from DMA100 to DMA33
get LL working fine. (<3ms)

- Stefan


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