Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!VAX1!tim
From: tim@VAX1.CC.UAKRON.EDU (Timothy H Smith)
Newsgroups: comp.sys.sgi
Subject: What is the real Speed of a 4D/240 ?
Message-ID: <139@VAX1.CC.UAKRON.EDU>
Date: 25 Apr 89 03:02:52 GMT
Organization: U of Akron, Computer Center
Lines: 24

We have just obtained a 4D/240 and are using it for scaler
floating point operations.  We do not need a vector machine.
We were told the floating point speed was about 12 mflops.
Well it turns out to be about 4 mflops. 
When the fortran compiler runs at any optimzation level the numbers
it generates are all bad.  Turn off the optimzation and all is fine.
Also when the machine is running some reasable jobs the interactive
response goes to nothing.  I mean 5 minutes for a ls.
I know the machine need more memory, but I don't expect this.


What is the state of the SGI compilers.  Not so good as far as I can 
tell.  Try to run power fortran and none of the results are good.
Power fortran was bought to utilize all 4 processors..  It would
be nice if it worked.  Can anyone from SGI comment on this.

Our machine is a 4D/240S with 16meg of memory.


				thanks,

				tim@vax1.cc.uakron.edu

*** my comments are mine and do not reflect my orginization ***