Date: Wed, 27 Aug 1997 21:02:27 -0700 (PDT) From: Simon Shapiro <Shimon@i-connect.net> To: Christopher Petrilli <petrilli@amber.org> Cc: smp@FreeBSD.ORG, Peter Stubbs <peters@gil.com.au>, Kyle Mestery <mestery@winternet.com> Subject: Re: A how does it work question. Message-ID: <XFMail.970827210227.Shimon@i-Connect.Net> In-Reply-To: <Pine.BSF.3.95q.970827101440.20292B-100000@chaos.amber.org>
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Hi Christopher Petrilli; On 27-Aug-97 you wrote: > In the end, I would think that software would be the conjstriction point > (in fact seperate memory makes it an MPP system, not an AMP/SMP system). > This is the concept behind ccNUMA, etc... > > Because of the nature of the FreeBSD kernel (and I suppose the probably > applies to Linux, but don't know), all I/O is threaded thru the #0 CPU, > and thereby it becomes a HUGE bottleneck. Correct. I built a Z-80 system like that in 1980. Worked well because CPU cycles were in short supply. Disks were amazingly similar to today`s. Simon
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