lkml.org 
[lkml]   [1997]   [Feb]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: MMX for kernel
    Date
    > If there were many, many proceses which used the FPU, one could imagine
    > an advisory bit which meant "when task switching to this process,
    > immediately restore my FPU registers, since I'm an intensive FPU
    > user".

    wouldn't only 2 FP-intensive (compute) processes be enough for this scenario ?

    > This would avoid the hardware fault after each task switch to
    > that process if there were many processes using the FPU. However, this
    > hasn't been implemented yet, and in practice it hasn't seemed to have
    > been a problem.

    and what about runnung 2+ FP cmopute jobs on a dual-PPro200 (SMP) machine ?
    how often do processes switch from one CPU to another needing to save/reload
    FPU registers and hardware faults ?

    any rough estimation how much benefit it might be to add such a flag
    for FP-bound processes if Linux is only used as "compute server" ?


    Harald
    --
    All SCSI disks will from now on ___ _____
    be required to send an email notice 0--,| /OOOOOOO\
    24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\
    \ \/OOOOOOOOOOOOOOO\
    \ OOOOOOOOOOOOOOOOO|//
    Harald Koenig, \/\/\/\/\/\/\/\/\/
    Inst.f.Theoret.Astrophysik // / \\ \
    koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^

    \
     
     \ /
      Last update: 2005-03-22 13:38    [W:3.088 / U:0.296 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site