...
As you can see that shows the number of cpus (NCPU), the number of CPU sockets (NSOC), the number of cores (NCOR) and the number of threads (NTHR). This information could be important as you plan jobs but it essentially reflects what was said in regard to HT cores. Note that all argon nodes have the same processor topology. SGE uses the concept of job slots which serve as a proxy for the number of cores as well as the amount of memory on a machine. Job slots are one of the resources that is requested when submitting a job to the system. As a general rule, the number of job slots requested should be equal to or greater than the number of processes/threads that will actually consume resources. The parallel environment to request an entire node on Argon is called 56cpn. For one node you would request
| No Format |
|---|
qsub -pe 56cpn 56 |
More nodes would be requested by specifying a slot count that is a multiple of 56. So for 2 nodes
| No Format |
|---|
qsub -pe 56cpn 112 |
and so on.
Using the Basic Job Submission and Advanced Job Submission pages as a reference, how would one submit jobs taking HT into account? For single process high throughput type jobs it probably does not matter, just request one slot per job. For multithreaded jobs, request one job slot per thread. So if your application runs best with 4 threads then request something like the following.
...