Date: Wed, 26 Mar 2003 14:46:47 -0800 From: Paul Saab <ps@mu.org> To: "Cagle, John (ISS-Houston)" <john.cagle@hp.com> Cc: freebsd-smp@freebsd.org Subject: Re: how many cpus can freebsd support in smp? Message-ID: <20030326224647.GA57345@elvis.mu.org> In-Reply-To: <C50AB9511EE59B49B2A503CB7AE1ABD10476C147@cceexc19.americas.cpqcorp.net> References: <C50AB9511EE59B49B2A503CB7AE1ABD10476C147@cceexc19.americas.cpqcorp.net>
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jhb 2003/03/21 13:46:15 PST
FreeBSD src repository
Modified files: (Branch: RELENG_4)
sys/i386/include apic.h
Log:
MFC: rev 1.20: expand the APIC_ID_MASK to cover all 8 upper bits. This
fixes SMP on the SW7500CW2 motherboards.
You'll still need to increase NAPICID on the 8-way machine w/
hyperthreading. It would be interesting to know if the machine boots
or if there's some other define that needs to be increased..
Cagle, John (ISS-Houston) (john.cagle@hp.com) wrote:
> It was about a month ago. When was the APIC mask widened?
>
> > -----Original Message-----
> > From: Brooks Davis [mailto:brooks@one-eyed-alien.net]
> > Sent: Wednesday, March 26, 2003 4:11 PM
> > To: Cagle, John (ISS-Houston)
> > Cc: Barry Wu; freebsd-smp@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.
> > PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4
> >
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