Date: Tue, 4 Jun 1996 15:25:10 -0700 From: Sean Eric Fagan <sef@kithrup.com> To: smp@freebsd.org Subject: Re: Unix/NT synchronization model (was: SMP progress?) Message-ID: <199606042225.PAA15769@kithrup.com> In-Reply-To: <1827.833925902.kithrup.freebsd.smp@critter.tfs.com> References: Your message of "Tue, 04 Jun 1996 15:00:44 PDT." <199606042200.PAA23901@MindBender.HeadCandy.com>
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In article <1827.833925902.kithrup.freebsd.smp@critter.tfs.com> you write: >Reply-to: phk@freebsd.org >As in "I expect your guys to know this before you even try it ?" > >Frankly, we havn't spent much time seriously persuing this issue. Well, that's not *quite* true ;). Right now, it's going for extremely low-grained MP support -- only one processor can be in kernel mode at a time. If/when the secondary processor(s) can take an interrupt, it will probably have reached that goal, and will manage to improve performance. Okay, so that's an extremely short-ranged goal ;). But I don't expect true symmetric MP to be happening for quite some time yet -- there's just too much that would have to be changed. (Locks around nearly every structure reference in the kernel, for example.) Sean.
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