Ron Chen wrote:
As long as Grid Engine is not using more job slots than the configured
number (the no. of processors in the system by default), then it is
the correct behaviour.
The OS should spread the tasks around evenly. How many tasks are there
on your 12-core machine?
We have on each host 2 6-core Prozessors, ergo 12 slots. And 12 slots
are configured in the SGE for each host. The SGE also correctly does not
allow more than 12 tasks, but this 12 tasks are not distributed in the
way that each one gets a separate core, but e.g. 8 get the cores 0-3, 4
tasks get cores 4-7 and the other cores remain unused. The double
seizure always occurs when more than 1 MPI-Job (not single prozessor
jobs) are scheduled to the same host.
Ursula
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