Date: Wed, 21 Dec 2005 23:04:53 +0100 From: Gary Jennejohn <garyj@jennejohn.org> To: Bruce Burden <brucegb@realtime.net> Cc: current@freebsd.org Subject: Re: Dual core CPUs support Message-ID: <200512212204.jBLM4rrR037479@peedub.jennejohn.org> In-Reply-To: Message from Bruce Burden <brucegb@realtime.net> of "Wed, 21 Dec 2005 14:41:49 CST." <20051221204149.GM56798@tigerfish2.my.domain>
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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. --- Gary Jennejohn / garyjATjennejohnDOTorg gjATfreebsdDOTorg garyjATdenxDOTde
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