Date: Mon, 28 Apr 1997 13:44:12 -0400 (EDT) From: Bernie Doehner <bad@uhf.wireless.net> To: Terry Lambert <terry@lambert.org> Cc: smp@freebsd.org Subject: Re: Quad Pro 150 motherboard? Message-ID: <Pine.BSF.3.95.970428133718.1713B-100000@uhf.wdc.net> In-Reply-To: <199704281717.KAA02093@phaeton.artisoft.com>
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> The PPro's are stackable without additional electronics external > to the processor. This makes it a *lot* easier to do multiple > CPU's up to large numbers. Didn't anyone ever notice those neat traces between the CPUs and other devices on the MB? The higher and higher you go in frequency, the shorter and shorter a wavelength becomes and the more and more these traces start to look like antennas. There's a physical limit as to how long these traces can be and this limit also affects how closely you can space CPUs, without setting up a CPU hierarchy. > Personally, I'd like a 32 processor machine; of course, that means > fixing the kernel so that it doesn't bog down on interprocessor > synchronization, starting with the allocation mechanism and a > hierarchical lock manager. And finding a way to build a 3-D motherboard. > My goal would be to have incremental compiles going on in edit sessions > so that when I was done editing, the code was read to run. I hate this > "wait for the compile" BS. > Would that be nice? :) Bernie
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