Am 17.05.2011 um 16:20 schrieb Chris Jewell:
> Does anybody have a (simple) way of obtaining the requested number of slots
> for, say, a parallel SMP interactive session from within that session? I'm
> currently having an issue with Matlab spawning too many threads and causing
> load average problems: Matlab by default uses as many threads as there are
> CPUs on a physical machine, but I use core binding to control such unwise
> assumptions. Therefore, for optimum performance, it would be really useful
> to write a script in the matlabrc file that grabs the number of requested SMP
> slots, and sets the maxNumCompThreads accordingly.
You can add this to your ~/.profile or alike:
MYPARENT=`ps -p $$ -o ppid --no-header`
#MYPARENT=`ps -p $MYPARENT -o ppid --no-header`
#MYPARENT=`ps -p $MYPARENT -o ppid --no-header`
MYSTARTUP=`ps -p $MYPARENT -o command --no-header`
if [ "${MYSTARTUP:0:13}" = "sge_shepherd-" ]; then
echo "Running inside SGE"
MYJOBID=${MYSTARTUP:13}
MYJOBID=${MYJOBID% -bg}
echo "Job $MYJOBID"
. /var/spool/sge/$HOSTNAME/active_jobs/$MYJOBID.1/environment
unset HISTFILE
fi
(adjust the path to the spool directory).
Then you can also export:
export OMP_NUM_THREADS=$NSLOTS
or any other environment variable which is necessary.
==
How many lines of:
MYPARENT=`ps -p $MYPARENT -o ppid --no-header`
you need depends on the startup method you used (whether it's -builtin-, rsh or
ssh).
==
reuti@pc15370:~> qrsh -l h=pc15370
Running inside SGE
Job 459
reuti@pc15370:~> echo $NSLOTS
1
-- Reuti
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