Article View: comp.sys.powerpc
Article #1319Re: Apple? (subject change)
From: Tim Olson
Date: Sun, 20 Aug 1995 05:25
Date: Sun, 20 Aug 1995 05:25
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1832 bytes
In article <415mt0$psf@sundog.tiac.net>
Jim Williams <williams@tiac.net> writes:
> I'm not sure if it is my understanding of the term SMP is off, your
> definition of Hydra is off, or if you are right. What does SMP mean
> -- in particular the "S" part? Also, Exactly what was (is?) Hydra?
> (I have some **extrememly** vague memory of the word. I have the
> feeling that *all* I knew was that there was something called Hydra.)
>
> My gut feeling is that Hydra was an early multi-processor project, but
> that the methodology was not very similar to what is now called SMP.
> I admit that I'm guessing.
C.mmp was an early multiprocessor project at CMU, using PDP-11's and a
crossbar switch to memory and I/O modules. One of the novel features
of this system (at the time) was that it was an MIMD (Multiple
Instruction, Multiple Data) machine which symmetric (the "S" in SMP),
and the OS was shared across all of the processors in the system.
-- Tim Olson
Apple Computer, Inc. / Somerset
tim@apple.com
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Path: arc1-ca.pugleaf.net!ibmoto.com!news From: tim@apple.com (Tim Olson) Newsgroups: comp.sys.powerpc,comp.os.linux.advocacy,comp.sys.mac.advocacy,comp.os.os2.advocacy,comp.sys.amiga.advocacy,comp.sys.intel Subject: Re: Apple? (subject change) Date: 20 Aug 1995 05:25:16 GMT Organization: Apple Computer, Inc. / Somerset Sender: -Not-Authenticated-[7463] Message-ID: <416gvs$rso@cerberus.ibmoto.com> References: <40viu3$kti@sundog.tiac.net> <nevin-1708950756520001@mac-nevin.cs.arizona.edu> <40vpim$7kl@goonsquad.spies.com> <411tic$gbg@sundog.tiac.net> <41372h$4m6@cerberus.ibmoto.com> <415mt0$psf@sundog.tiac.net> NNTP-Posting-Host: ppp1-11.ibmoto.com X-Posted-From: InterNews 1.0.7@ppp1-11.ibmoto.com Xdisclaimer: No attempt was made to authenticate the sender's name.