how many cpus can freebsd support in smp?

Cagle, John (ISS-Houston) john.cagle at hp.com
Wed Mar 26 22:43:49 PST 2003


It was about a month ago.  When was the APIC mask widened?

> -----Original Message-----
> From: Brooks Davis [mailto:brooks at one-eyed-alien.net] 
> Sent: Wednesday, March 26, 2003 4:11 PM
> To: Cagle, John (ISS-Houston)
> Cc: Barry Wu; freebsd-smp at freebsd.org
> Subject: Re: how many cpus can freebsd support in smp?
> 
> 
> On Wed, Mar 26, 2003 at 08:22:57AM -0600, Cagle, John 
> (ISS-Houston) wrote:
> > I've had 8 real cpus running on a ProLiant DL740.  I tried 
> to get 16 
> > (8 with hyperthreading), but the kernel needs xapic or 
> clustered apic 
> > support to do that.
> 
> Have you tried since the APIC mask was widened?  Prior to 
> that it obviously wouldn't work since you had 8 bits and 16 CPUs.
> 
> -- Brooks
> 
> -- 
> Any statement of the form "X is the one, true Y" is FALSE.
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> 


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