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From: Wen Long at UMCES/HPL (wenlong_at_[hidden])
Date: 2006-08-01 13:48:28


Durga,

> Do you want to use MPI to chain a bunch of such laptops together (e.g. via ethernet) or just for the cores to talk to each other? If the latter; you do not need >MPI. Your SMP operating system (e.g. Linux) will automatically utilize both cores. The Linux 2.6 kernel also supports processor affinity which will always >schedule the kernel on a fixed core, avoiding cache invalidation and stuff like that.

    While, I have got a 20 node linux cluster for MPI runs of a large code. Yet the code is kind of hard to debug because I don't have control over that cluster. So my motivation is to run the code using laptop which has two processors with MPI instead of SMP and use a fancy new debugging tool by IBM,,, if you visit http://www-128.ibm.com/developerworks/edu/os-dw-os-ecl-ptp.html . It uses Eclipse visual development kit for debugging. Eclipse is good for C/C++, but my code is Fortran with CPP wraps for preprocessor. Now looks like that people have hooked up Eclipse with Fortran ( http://www.eclipse.org/photran/ ),,,, I want to give it a try.

     If we combine Eclipse + FDT + PTP that will be great and we don't have to buy the TotalView from http://www.etnus.com/ .

    All comments are welcome,,,,

    Wen
  ----- Original Message -----
  From: Durga Choudhury
  To: Open MPI Users
  Sent: Tuesday, August 01, 2006 1:27 PM
  Subject: Re: [OMPI users] Open MPI on Dual Core Laptop?

  Do you want to use MPI to chain a bunch of such laptops together (e.g. via ethernet) or just for the cores to talk to each other? If the latter; you do not need MPI. Your SMP operating system (e.g. Linux) will automatically utilize both cores. The Linux 2.6 kernel also supports processor affinity which will always schedule the kernel on a fixed core, avoiding cache invalidation and stuff like that.

  Thanks

  Durga

   
  On 8/1/06, Wen Long at UMCES/HPL <wenlong_at_[hidden]> wrote:
    Hi,

       Any people have installed open MPI on a Dual Core desktop or laptop? Such as Intel Centrino Duo ? or it is totally impossible?

       Thanks,,

       Wen

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