Re: SMP on quad xeons

From: Erich Dollansky (oceanare_at_pacific.net.sg)
Date: 09/26/04

  • Next message: Steven Hartland: "Re: SMP on quad xeons" 
    Date: Sun, 26 Sep 2004 08:53:00 +0800
To: jromero@save-ferris.com

    Hi,

    jromero@save-ferris.com wrote:
    > Posted to freebsd-smp but didn't get too many replies, so I apologize for

    I am on that list too but I can't remember your posting.

    > cross posting ahead of time. Need to configure groupware server and
    > multiprotocol wireless proxy for aproximatly 2500 accounts. Application
    > is heavily multi threaded and willrequire alot of CPU power. The OS will
    > be FreeBSD 5.x Thinking of going with ServerWorks* Grand Champion HE quad
    > xeon server board. Has anyone had any SMP experience with quad xeon

    I read on the list several times that FreeBSD has problems when 6 or
    more CPUs are in a box. You could be affected by this if HTT is enabled.

    There is currently a lot of development around the new scheduler (ULE)
    which will be usable very soon. Check the mailing list to find out more.

    Another thing. Did you consider Opterons? Tyan has a board with four of
    them. You would not be affected by the 6-8 CPU 'problem'.

    > systems on freebsd 5.x??? I'm curious to know if anyone experienced
    > any major technical stumbling blocks. I guess I also want to know how
    > well Freebsd 5.x will scale on a 4 proc. Will freeBSD 5.x utilize
    > a quad xeon board as efficiently as linux2.6 system ??
    >
    I cannot tell as I never used Linux.

    I run FreeBSD on a Dual-Athlon with the old scheduler (BSD). My
    experience is that this scheduler is not as good as the one you find on
    Solaris or HP-UX. This is also the reason why the new one was developed.

    Erich
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  • Next message: Steven Hartland: "Re: SMP on quad xeons"

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