Re: Hello, Jason

Date: Tue May 17 2005 - 11:03:01 PDT

  • Next message: Paul H. Hargrove: "Re: Hello, Jason"
    On Mon, May 16, 2005 at 11:38:10AM -0500, Tong_Liu_at_Dell_dot_com wrote:
    > Hello, Jason
    > I have tested LAM/MPI with BLCR enabled, it works so well! Great thanks
    > for your contribution for BLCR.
    Sure.  Glad you like it.
    > I also have some questions about BLUR:
    > 1. When should MPICH support BLUR?
    > 2. Can we manually checkpoint other MPI implementations, like MPICH or
    > MPICH-GM with BLCR directly rather than we have to change those mpich's
    > framework to work with BLCR?
    The MPI library needs to add code to support checkpointing MPI jobs with
    BLCR, so it doesn't just "work magically":  there is some software
    developement to do.  Unfortunately, there is currently no timeline for
    MPICH to support BLCR, although we hope they will add it in the future.
    LAM is currently the only open-source MPI that works with BLCR.  There
    are also a couple of vendor MPI implementations that should work with
    BLCR soon, though I'm not sure any of them have been released yet.
    > 3. Can BLCR still work if we compile LAM with intel compiler or PGI
    > compiler?
    Yes, I believe that should work.
    > 4. Can BLCR work on intel EM64T CPU?
    We are in the process of adding Opteron support to BLCR, though we have
    not released it yet.  The Intel EM64T instruction set is very similar to
    the Opteron, but there are some differences (to deal with
    hyperthreading), and I'm not sure if these differences will mean that
    we'll need separate code to support EM64T.  I'm cc-ing our kernel
    developer, who may be able to give you a more definitive answer.  
    Jason Duell             Future Technologies Group
    <jcduell_at_lbl_dot_gov>       Computational Research Division
    Tel: +1-510-495-2354    Lawrence Berkeley National Laboratory

  • Next message: Paul H. Hargrove: "Re: Hello, Jason"