Date: Sat, 5 Feb 2005 16:35:45 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Sten Spans <sten@blinkenlights.nl>, freebsd-amd64@freebsd.org Subject: Re: Would this system work correctly with FreeBSD 5.3 ? Message-ID: <20050206003545.GK9350@dragon.nuxi.com> In-Reply-To: <41F31836.2010403@freebsd.org> References: <20050122141741.9690.qmail@web26804.mail.ukl.yahoo.com> <Pine.SOC.4.61.0501230246080.13561@tea.blinkenlights.nl> <41F31836.2010403@freebsd.org>
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On Sat, Jan 22, 2005 at 08:21:26PM -0700, Scott Long wrote: > Sten Spans wrote: > >- HTT: > > Amd is indeed working on dual core cpu's, > > samples are rumoured to be out there. > > But there are rumours of heat issues and/or > > socket changes. I guess we'll see later this > > year. There are no heat issues, and the pin-out is identical to single-core Opteron CPU's -- 940-pin. Dual-core CPU's work just fine in AMD's Quad reference machine. > >- Quad motherboards: > > It's a shame that tyan connects all > > the pci interfaces on their quad motherboard > > to one cpu. The hp/compaq quad proliant has > > seperate buses to two cpu's for extra bandwith. .. > Also, I don't believe that PCI buses are connected to CPUs > at all. They are connected via HT-PCI bridges that act as > normal HT peers. Only memory is connected directly to the CPU. What he is saying is that Tyan put all the PCI-X & PCI controllers on a single HT "chain" off of the BSP. A better design, such as the HP DL585, connects its PCI-X controllers spread out over two CPU's (using HT links). -- -- David (obrien@FreeBSD.org)
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