[linux-audio-user] IRQ settings and low latency

Mark Knecht mknecht at controlnet.com
Tue Mar 16 10:35:00 EST 2004

Clemens Ladisch wrote:
> Mark Knecht wrote:
>>The priority, as I understand it, is driven by the highest vector
> 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.

>>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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