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    SubjectRe: process priorities
    On Wed, 16 Jul 1997, Marc Lehmann wrote:
    > I always liked that SGI's could easily send jobs into real background..
    > their realtime priorities included neagtive numbers which meant
    > that these processes have LOWER prioritires than even SCHED_OTHER
    > jobs.

    Just for the curious, here's a snippet of output from IRIX 6.3 ps:

    F S UID PID PPID C PRI NI P SZ:RSS WCHAN TTY TIME CMD
    39 S 0 0 0 0 39 RT * 0:0 802a0000 ? 0:01 sched
    b9 S 0 2 0 0 39 RT * 0:0 8029f9c0 ? 0:07 vhand
    b9 S 0 3 0 0 39 RT * 0:0 8029f628 ? 0:29 bdflush
    b9 S 0 4 0 0 25 20 * 0:0 8029fa60 ? 0:00 munldd
    b0 S 1000 1147 243 0 60 20 * 449:50 c000033c ? 0:58 fam
    b0 R 1000 10556 1294 75 200 BT * 406:46 - pts/1 742:36 rc5v2

    'NI' is the scheduling queue the process is in. IRIX has 7, in order of
    decreasing priority:

    'OS' Kernel
    'RT' Real-time (equivalent to Linux's SCHED_FIFO I believe)
    'DL' Deadline
    'GN' Gang
    'TS' Time-share (all normal processes fall here)
    'BG' Gang-batch
    'BT' Batch (patches were posted to the list recently for this)

    -Dan


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