Dear all,
we have parallel jobs with mixture openmp and mpi compiled with ifort.
We found out that job threads change the physical processor core from
time to time, this can lead to increased run time of the job. Outside
the gridengine there is a variable "export KMP_AFFINITY=scatter " which
set affinity to physical cores of the threads.
Unfortunately we can not use this setting in our gridengine job scripts.
With this definition two different jobs which are submitted to the same
node will occupy the same processor cores
by the gridengine.
Does anyone know a way to define this option in the gridengine directly
? I'm using ogs 2011.11p1 on Intel 6core processors.
Udo
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