[lkml]   [1999]   [Jun]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [alsa-devel] Re: [patch] `cp /dev/zero /tmp' (patch against 2.2.9)
> The process  does only sit in a loop and write() data from RAM to /dev/dsp
> ( RT FIFO scheduled),
> and in background I call scripts which write / copy / read from/to large files,
> trying to disturb the RT thread.
> Obviously my disk I/O processes are scheduled without realtime priority.
> The scheduling latencies on Linux go up to 70-130ms on pretty high end HW.

What hard disk controller, if its IDE how is it tuned (DMA/UDMA, irq masked ?)
If it is a random socket7 board what fairness settings have you got in the
BIOS as by default on some of these boards IDE DMA can hog the entire bus.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:52    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean