Subject: Re: [linux-audio-user] IRQ settings and low latency
From: Mark Knecht (mknecht_AT_controlnet.com)
Date: Tue Mar 16 2004 - 17:35:00 EET
Clemens Ladisch wrote:
> Mark Knecht wrote:
>
>>The priority, as I understand it, is driven by the highest vector
>>number.
>
>
> Actually, lower vector numbers have higher priorities. The priority
> level is determined by the upper four bits of the vector number.
Thanks for setting the record straight.
<SNIP>
>>Unfortunately I know of no method to tune the system interrupt
>>priorities other than move cards ...
>
>
> The kernel must be configured to assign different vector numbers to
> specific interrupts. The standard kernel cannot do this, but, as it
> happens, I've just written a patch which adds this capability. See
> <http://www.informatik.uni-halle.de/~ladischc/linux_interrupt_priorities.html>.
Very interesting. Thanks.
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