[SCore-users-jp] Re: [SCore-users] pThreads

[kameyama ＠ pccluster.org]

In article <1102323665.27655.7.camel ＠ zeralda.streamline> Nick Birkett <nick ＠ streamline-computing.com> wrotes:
> Using Intel 8.1 one of our users gets a Network Freezing error over
> pm-ethernet  which we cannot get with any other code we tried.
> 
> The user's code is using Intel Math kernel library 7.0.1 and is linked
> with -lpthread (system Pthread library) and running SCore 5.6.1 on
> RedHat 9. 

We don't test Math kernel library.
But we known runtime library of the Intel fortran compiler version 8.0
or later use pthread library.
(So we set -nockpt option when Intel Fortran compiler version 8.)
If you use C or C++ and pthread library,
please specify -nockpy in the link time.

If you use SCore 5.8.0 or later, and -lpthread is specify,
-nockpt is also specified automachcally.

> Could this be a thread safe issue with Score with the intel 8 patches 
> (normally Score is pthread safe but not sure about this with Intel 8) ?

But MPICH (version 1) is not thread safe.
See also "Thread Safety" in the following URL:
    http://www-unix.mcs.anl.gov/mpi/mpich/
    
> We will try upgrading to Score 5.8.1.

SCore 5.8.1 dose not have binary compatibirity.
We recommended to use SCore 5.8.2 instead of SCore 5.8.1.

                       from Kameyama Toyohisa
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