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Re: [gomp] omp performance question

From: "François-Xavier Coudert" <fxcoudert at gmail dot com>
To: "Daniel Franke" <franke dot daniel at gmail dot com>
Cc: fortran at gcc dot gnu dot org
Date: Mon, 30 Oct 2006 12:31:38 +0100
Subject: Re: [gomp] omp performance question
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References: <640ad44b0610300309u3e7f167fq62d2ec530766564a@mail.gmail.com>

single threaded ( FCFLAGS=-O1) timings on x64_64, dual CPU (dual core
each), gave:
real    64m36.502s
user    64m36.886s
sys     0m0.040s

same machine, OMP enabled  (FCFLAGS="-O1 -fopenmp"):
real    67m16.611s
user    112m22.885s
sys     25m44.641s

What is OMP_NUM_THREADS set to?

FX

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