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Subject: Re: [OMPI users] MPI_Reduce performance
From: Terry Frankcombe (terry_at_[hidden])
Date: 2010-09-08 21:52:34


Gabriele,

Can you clarify... those timings are what is reported for the reduction
call specifically, not the total execution time?

If so, then the difference is, to a first approximation, the time you
spend sitting idly by doing absolutely nothing waiting at the barrier.

Ciao
Terry

-- 
Dr. Terry Frankcombe
Research School of Chemistry, Australian National University
Ph: (+61) 0417 163 509    Skype: terry.frankcombe