Big problem with performance measuring on a INTEL HYPERCUBE

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1 total messages Started by Alexander Celic Sat, 02 Jan 1993 18:57

#2411

Author: Alexander Celic
Date: Sat, 02 Jan 1993 18:57

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Hi, there!

   I've been measuring performance of some Fortran 77 commands on an
Intel's HYPERCUBE. The data I've become is very unstable (read: one 
kernel takes ALLWAYS  same other time to execute; the difference between
two different meassurements can be up to a factor 4 !!!)

   Of course, the main source of this problem lies on pipeline and
cache, but is there allso something more? If somebody had the same problem,
I'd really like to know how he (she?) solved it. I couldn't think of anything
but taking the middle result. Has anybody found some other way?

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