Date: Wed, 1 Dec 2004 10:15:49 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: "Ketrien I. Saihr-Kenchedra" <ketrien@error404.nls.net> Cc: freebsd-amd64@freebsd.org Subject: Re: kernel panic with greater that 8 GB of memory Message-ID: <20041201181549.GA6236@troutmask.apl.washington.edu> In-Reply-To: <20041201042900.A88450@bahre.achedra.org> References: <20041129211341.GA26548@troutmask.apl.washington.edu> <41AC6FF8.40501@freebsd.org> <20041130183555.GA32237@troutmask.apl.washington.edu> <20041130142652.A59122@bahre.achedra.org> <20041201084537.GA1621@dragon.nuxi.com> <20041201042900.A88450@bahre.achedra.org>
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On Wed, Dec 01, 2004 at 04:47:51AM -0500, Ketrien I. Saihr-Kenchedra wrote: > On Wed, 1 Dec 2004, David O'Brien wrote: > > >There is no 'ccNUMA' setting in the BIOS. A multi-processor Opteron is a > >NUMA architecture machine regardless of any BIOS settings. I.E. there is > >no way to disable that a MP Opteron is a NUMA machine. > >The setting of interest is should the BIOS round-robin interleave > >physical addresses across the NUMA nodes[*]. The reference AMI BIOS > >refers to this as "Node Interleaving". It should be "DISABLED". Or if > >the BIOS speaks of the SRAT table, it should be "ENABLED". While FreeBSD > >doesn't use the SRAT table (and cannot until ACPI 3.0 BIOS's); turning on > >the SRAT turns off node interleaving. > > David, trying very hard to be nice, the S2882's a 'Special Case.' > Where special should be taken as 'short bus.' VERY short bus. > > On the S2882/S2885, and even the S4882, the BIOS specifically says, and I > quote: 'ccNUMA Support.' No joke. The beauty is that ccNUMA is, you got > it, SRAT Table Control, which _disables_ interleave completely. Beautiful, > huh? My BIOS does not have "ccNUMA Support" anywhere. During POST I see AMIBIOS 2003(c), American Megatrends, Inc. BIOS Date: 07/07/04 11:11:45 Ver 08.00.10 TYAN High-End Dual AMD Opteron BIOS v2.03 -- Steve
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