I am using Intel devcloud, openmp, numbers of threads

[stuartknoy]

Hi guys I am using intel DevCloud to compile and submit my numerical codes, openmp, etc - but I am only ever (not complaining) getting 12 threads - how do I get more cores/threads?? 

Maybe I am missing something

Stuart

[AthiraM_Intel]

Hi,

Thanks for reaching out to us.

Intel oneAPI DevCloud has 3 different processors

Intel® Xeon® Scalable 6128 processors, Intel® Xeon® Scalable 8256 processors and Intel® Xeon® E-2176 P630 processors (with Intel® Graphics Technology)

Intel® Xeon® Scalable 6128 processor has 6 cores and 12 threads in one socket.

(https://ark.intel.com/content/www/us/en/ark/products/120482/intel-xeon-gold-6128-processor-19-25m-cache-3-40-ghz.html)

Intel® Xeon® Scalable 8256 processor has 4 cores and 8 threads in one socket.

(https://ark.intel.com/content/www/us/en/ark/products/192467/intel-xeon-platinum-8256-processor-16-5m-cache-3-80-ghz.html)

Intel® Xeon® E-2176 P630 processor has 6 cores and 12 threads in one socket.

(https://ark.intel.com/content/www/us/en/ark/products/134867/intel-xeon-e-2176m-processor-12m-cache-up-to-4-40-ghz.html)

Please refer the given links for more information.

You can refer the following link to know more about DevCloud:  https://devcloud.intel.com/oneapi/home/

You could find the architecture and features of the compute nodes available by using the command "pbsnodes" .

Also "lscpu" command will give the details of the compute node you are using.

If you have any further issues please let us know.

Thanks

[stuartknoy]

it seems like I am only getting one socket - i.e 12 threads

I submit me job like this

qsub -l nodes=1:gpu:ppn=2,walltime=24:00:00 -d . job.sh

and job.sh looks like this

source /opt/intel/inteloneapi/setvars.sh

make run

./cdem2D run_description 0 

where 0 on my command line means max threads

[AthiraM_Intel]

Hi,

You are using compute node with gpu, it has only one socket.

If you have any further issues please let us know.

Thanks.

[AthiraM_Intel]

Hi,

Could you please give us an update? Is your query clarified?

Thanks.

[stuartknoy]

Yes - I understand now I was interpreting "sockets" as cores - which they clearly aren't - so my openmp codes (compiled with icc) are running on one socket, 6 cores, 12 threads - and very quickly as well

[stuartknoy]

Yes - I understand now I was interpreting "sockets" as cores - which they clearly aren't - so my openmp codes (compiled with icc) are running on one socket, 6 cores, 12 threads - and very quickly as well

[AthiraM_Intel]

Hi,

Thanks for the confirmation. We would discontinue monitoring this issue, please raise a new thread if you have further issues.

Thanks.