Date: Sun, 26 Sep 2004 08:53:00 +0800 From: Erich Dollansky <oceanare@pacific.net.sg> To: jromero@save-ferris.com Cc: freebsd-hackers@freebsd.org Subject: Re: SMP on quad xeons Message-ID: <415612EC.9010805@pacific.net.sg> In-Reply-To: <18553.192.168.2.11.1096151640.squirrel@192.168.2.11> References: <18553.192.168.2.11.1096151640.squirrel@192.168.2.11>
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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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