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

20 Nov 2002

...
 From: Maarten de Boer &lt;mdeboer(a)iua.upf.es&gt;
Date: Wed, 20 Nov 2002 08:29:31 +0100

On 19 Nov 2002 15:29:19 -0500
jfm3 &lt;jfm3(a)ouroboros-complex.org&gt; 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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Re: [linux-audio-dev] disk latency under 2.4.19 ll+preempt