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- Newsgroups: comp.unix.cray
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!swrinde!gatech!willis1.cis.uab.edu!hyatt
- From: hyatt@cis.uab.edu (Robert Hyatt)
- Subject: Re: Cray EL
- Message-ID: <1992Dec22.014511.10077@cis.uab.edu>
- Organization: University of Alabama at Birmingham
- References: <BzL9CC.9E@rex.uokhsc.edu> <1992Dec22.010746.12873@afterlife.ncsc.mil>
- Date: Tue, 22 Dec 1992 01:45:11 GMT
- Lines: 26
-
- In article <1992Dec22.010746.12873@afterlife.ncsc.mil> dpmccul@afterlife.ncsc.mil (Dean McCullough) writes:
- >
- >> I am curious as to what anybody thinks of the Cray EL. I am
- >>looking over some stuff, but I was wondering what other people think of
- >>it -- especially people who have worked with it. I have worked with
- >>the Cray YMP as a user, but I wonder how much translates down to
- >>the Cray EL. How does it run vector, scaler, IO, etc?
- >
- >Just started looking at it, but in an initial set of benchmarks,
- >comparing one processor to one processor of the YMP-8, the EL was
- >running 5 to 8 times slower. This is more than the difference in
- >clock rate would account for (each program was recompiled for each
- >machine). We have not looked hard at the code to understand why the
- >differences; which will need to be done before any thing definitive
- >can be said.
-
- Might be memory. Seems that the memory on the EL is significantly
- slower than the base YMP. The new big memory YMP can be significantly
- slower due to it's memory speed.... and I suspect that the EL uses
- this slower memory as it's standard..... Not having run on either
- of the two machines (EL or big Y), I don't qualify as an expert.
-
-
- --
- !Robert Hyatt Computer and Information Sciences !
- !hyatt@cis.uab.edu University of Alabama at Birmingham !
-