Cypress CSC-1200T Guia do Utilizador descarregar pdf (Página 18)

18 Cray T3E User’s Guide

environment. After this, the commands in the script are executed using

/bin/sh. This can be overridden using the option -s shell_name.

Here follows an example script, which is written into a ﬁle called t3e.job.

The request name is set to simulation. The job ﬁle reserves at max-

imum six processors (option -l mpp_p=6), and the approximate maxi-

mum wall clock time is 600 seconds (-l mpp_t=600). Standard error is

concatenated with the standard output (option -eo).

#QSUB -r simulation

#QSUB -l mpp_p=6

#QSUB -l mpp_t=600

#QSUB -eo

#QSUB

cd $TMPDIR

cp $HOME/data/inputfile .

cp $HOME/src/a.out .

mpprun -n $NPES a.out

First, the script changes the current directory to the temporary direc-

tory. Thereafter, the input ﬁle inputfile and the executable program

a.out are copied there. Finally, the mpprun command triggers the actual

parallel execution.

If the time limit of 600 seconds is reached, the job will be terminated.

The environment variable $NPES indicates the number of processors

actually allocated for the job. This is a local feature of the T3E at CSC.

To submit the previous job ﬁle to the prime queue, use the command

t3e% qsub -q prime t3e.job

You can use the command qstat for checking out the status of your

batch job. You get a listing of the current processes with the commands

top and ps -PeMf. Use the command qdel to delete a batch job from

the queue. See Chapter 8 for more details.

2.6 More information

There are normal Unix-style man pages available on the Cray T3E. In

addition to this, CSC’s help system is available on the Cray T3E. For

example, you can look up how to use the IMSL libraries:

help imsl

The guide Metakoneen käyttöopas (Metacomputer Guide) [Lou97]de-

scribes (in Finnish) the CSC environment in detail. See also the Web

address

http://www.csc.fi/metacomputer/english/crayt3e.html

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