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Can you have CCS only use soem of the CPUs on a node ? RRS feed

  • Question

  • We have some new 8 core machines on our CCS, is there a way to tell CCS to only use 4 of 8 for these new machines?

     

    Sunday, February 10, 2008 11:56 PM

Answers

  • Hi,

     

    We have nice support for core placement in the beta of our next product. You could specify 2 cores per socket kind of job placement.

     

    For more information on the beta please see: http://connect.microsoft.com or http://www.microsoft.com/hpc.

    • Marked as answer by Josh Barnard Thursday, March 26, 2009 12:28 AM
    Wednesday, February 13, 2008 12:36 AM
  • Are you using MPI? in that case you can tell MPI to use only some of the CPU's. For example,

     

    job submit .....  mpiexec -hosts %%CCP_NODES: 8= 2%%

    (note the space before 8 and before 2. the double %% is to escape the % and pass it for execution on the node)

     

    this command will replace 8 with 2 and will end up running 2 processes on each node (rather than 8)

     

    hope this helps,

    .Erez

     

    • Marked as answer by Josh Barnard Thursday, March 26, 2009 12:28 AM
    Saturday, February 16, 2008 8:02 PM

All replies

  • Hi,

     

    We have nice support for core placement in the beta of our next product. You could specify 2 cores per socket kind of job placement.

     

    For more information on the beta please see: http://connect.microsoft.com or http://www.microsoft.com/hpc.

    • Marked as answer by Josh Barnard Thursday, March 26, 2009 12:28 AM
    Wednesday, February 13, 2008 12:36 AM
  • Are you using MPI? in that case you can tell MPI to use only some of the CPU's. For example,

     

    job submit .....  mpiexec -hosts %%CCP_NODES: 8= 2%%

    (note the space before 8 and before 2. the double %% is to escape the % and pass it for execution on the node)

     

    this command will replace 8 with 2 and will end up running 2 processes on each node (rather than 8)

     

    hope this helps,

    .Erez

     

    • Marked as answer by Josh Barnard Thursday, March 26, 2009 12:28 AM
    Saturday, February 16, 2008 8:02 PM