Date: Wed, 27 Aug 1997 07:18:30 -0700 From: David Greenman <dg@root.com> To: Christopher Petrilli <petrilli@amber.org> Cc: Kyle Mestery <mestery@winternet.com>, Peter Stubbs <peters@gil.com.au>, smp@FreeBSD.ORG Subject: Re: A how does it work question. Message-ID: <199708271418.HAA01067@implode.root.com> In-Reply-To: Your message of "Wed, 27 Aug 1997 10:07:20 EDT." <Pine.BSF.3.95q.970827100635.20292A-100000@chaos.amber.org>
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>Because of this, wouldn't it be appropriate to say that FreeBSD is an >Assymetric MP, not Symmetric? Symmetric means that the kernel runs on >each processor, and there is no "one processor" which controls exclusivity >to the hardware. No. FreeBSD's MP is symetric - either CPU may execute kernel code. The issue has to do with concurrency and right now, only one CPU may execute the code at one time. Asymetric MP is something different entirely - in that case, only one CPU ever executes kernel code and it schedules the work for the other CPUs. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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