Date: Thu, 22 Dec 2005 00:26:23 +0000 From: Kris Kennaway <kris@FreeBSD.org> To: Gary Jennejohn <garyj@jennejohn.org> Cc: current@freebsd.org Subject: Re: Dual core CPUs support Message-ID: <20051222002623.GA63716@hub.freebsd.org> In-Reply-To: <200512212204.jBLM4rrR037479@peedub.jennejohn.org> References: <20051221204149.GM56798@tigerfish2.my.domain> <200512212204.jBLM4rrR037479@peedub.jennejohn.org>
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On Wed, Dec 21, 2005 at 11:04:53PM +0100, Gary Jennejohn wrote: > > Bruce Burden writes: > > On Wed, Dec 21, 2005 at 09:12:22PM +0100, Tomas Randa wrote: > > > Hello all friends of FreeBSD unix, > > > > > > I?d like to ask here, what is the actual situation with dual core CPUs - > > > Athlon 64 X2 etc. and their functionality with FreeBSD 5.X / 6.X / 7.0 > > > current. > > > > > > I tried 5.4/i386 with options SMP, 6.0/i386 with the same config, in > > > both cases system found only one CPU, but on 5.4 system wrote HTT 2 > > > logical units. > > > > > The i386 version disables HTT by default (see the security > > notices for summer 2005 or thereabouts), so I am not surprised that > > your second core is ignored/not reported. There is a switch that > > will enable the HTT (second core, in your case) if you wish. > > > > As another poster mentiond, the AMD64 version of FBSD will > > recognise the second core as expected. > > > > HTT has nothing to do with recognizing an X2 AMD64. I've been running > i386 since before 6R and FreeBSD has always seen both cores. > > Maybe the OP needs a new BIOS. I had to update my BIOS before the X2 was > correctly recognized. Yes, that is almost certainly the solution. Kris
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