Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!ucbvax!van-bc!ubc-cs!alberta!cpsc.ucalgary.ca!deraadt From: deraadt@fsa (deraadt) Newsgroups: comp.sys.m88k Subject: Re: Data General Aviion 7000, 8000 Message-ID: Date: 31 Mar 91 09:47:47 GMT References: <1991Mar14.183029.11714@neon.Stanford.EDU> <1991Mar27.135031.29533@webo.dg.com> Distribution: comp Organization: UofC cpsc Lines: 37 In-Reply-To: lewine@cheshirecat.webo.dg.com's message of 27 Mar 91 13:50:31 GMT Nntp-Posting-Host: fsa In article <1991Mar27.135031.29533@webo.dg.com> lewine@cheshirecat.webo.dg.com (Donald Lewine) writes: In article , deraadt@fsa.cpsc.ucalgary.ca (deraadt) writes: |> In article <1991Mar22.143552.16204@webo.dg.com> lewine@cheshirecat.webo.dg.com |> (Donald Lewine) writes: |> > A more meaningful metric is the SPEC benchmark. The AViiON gets |> > an overall SPECthrughput of 54. It does even better if you leave |> > out the double precision nuclear physics test. |> |> I've been eagerly awaiting a SPEC rating rather than just a SPECthruput. |> As I understand it, the SPECthruput is not just ncpu*SPEC, but some other |> contortion. |> |> Is DG afraid to give plain SPEC ratings, hiding behind SPECthruput? |> The SPECthruput measures a multi-processor. The SPECmark measures a uni-processor. The thruput test runs 2xCPUS copies of the spec tests and measures the total time to run all of the copies. The SPECthruput number is what a real user would see and includes the scheduler overhead and any other interference effects that would affect performance. It is not a "contortion". The SPECmark ratings are not meaningful because 3 of the CPUs would be idle for the test. The SPECthrughput was invented to measure multiprocessor systems. So, what is the Spec on one processor, rest idle. That's what I am asking. I think that spec on one processor is important, because it's the only way that the aviion multi's can be compared to uniprocessors. uniprocessor specthruput does not get posted often. So, what is the specmark for one processor, 3 idle?