lkml.org 
[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)
    Date
    From
    > 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.

    Alan


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:52    [W:5.277 / U:0.160 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site