🚀 go-pugleaf

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 !