There is an environment variable GOMP_AFFINITY in libgomp that binds threads to single cpus. Can I use it the same way with multi-cores (i.e GOMP_CPU_AFFINITY="0 1 2 3" in order to bind thread 1 to core 0 etc..)? Is this a good way to take advantage of the quad architecture?
Emmanuel On Tue, 15 Jul 2008 16:24:49 +0200, "Thomas Preud'homme" <[EMAIL PROTECTED]> said: > The Tuesday 15 July 2008 15:46:06 E. Rens, you wrote : > > The loop sharing looks exciting but openmp seems difficult to use too. > > Does openmp replace pthreads or work in combination ? > > AFAIK it use pthread to work but it create all necessary pthread at > startup to > avoid creating them at each loop parallelization. It should work properly > with pthreads, it wouldn't be packaged with gcc if it wasn't the case. > However I didn't test this combination. > > openmp is really simple to use, easier than programming the same thing > with > pthreads. You can see examples on wikipedia : > > http://en.wikipedia.org/wiki/OpenMP > > The purpose is to do simple parallelization. If you want to write an > algorithm > which needs modification to support multi-cores, you have to do it > yourself > with pthreads. > > Regards > > > > > Emmanuel > > > -- > Thomas Preud'homme > > Why debian : http://www.debian.org/intro/why_debian > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
