Hello all,
I am testing for the first time the core binding capabilities of SGE. I
want all my non-parallel environment jobs to have a core binding of 1
core (our users tend to forget about the -pe and submit multithreaded
jobs without requesting it). To do that, I am basing on this JSV script:
https://github.com/HPCKP/JSV-for-Grid-Engine/blob/master/jsv_core_binding.sh
This deals with non-pe jobs perfectly, but a new problem arises: When a
user submits a job to a pe_slots kind of parallel environment, I can
only set the core binding (as far as I understand) to either pe_min or
pe_max, but not to the real pe_slots that will be granted to the job
once it is scheduled.
An example:
User 1 submits a job with "-pe threaded 4-12 " to a 12-core node with 3
single-core jobs running. SGE grants the job 9 slots and it starts 9
threads. My 2 options now are: setting cb to pe_min (= 4) or to pe_max
(= 12). The first case will slow that job, and the second one will
ignore binding and mess with all 4 jobs in the node.
Is there any other way to set the core binding to exactly the number of
cores the job is granted?
Thanks in advance,
Txema
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