[mpich-discuss] MPICH2 1.0.6p1 & Windows HPC Server 2008 (badperformance)

[Seifer Lin]

Hi:

After that I put all 4 nodes in the same domain (originally they are in the
same workgroup)
For the MPI_Barrier(...) function, version 1.0.6p1 and 1.0.8 both return at
once.
But for another simple MPI program (Laplace equation solver), both 1.0.6p1
and 1.0.8 run very SLOW!!!!

I have noticed that if the command is like
mpiexec -hosts 2 192.168.1.1 192.168.1.2
\\192.168.1.1\shared\LaplaceSolver.exe<file://192.168.1.1/shared/LaplaceSolver.exe>
It runs very SLOW!!! (the processes are located at different machines)

Another command is like
mpiexec -hosts 2 192.168.1.1 192.168.1.1
\\192.168.1.1\shared\LaplaceSolver.exe<file://192.168.1.1/shared/LaplaceSolver.exe>
It runs at normal fast speed! (the processes are located at the SAME
machine)


I think this may due to the strict policies on network transfer of Windows
HPC Server 2008 (and Vista also)
Do you have any solution to this? thank you!

regards,

Seifer Lin

2008/12/8 Jayesh Krishna <jayesh at mcs.anl.gov>

>  Hi,
>  Can you try out the latest stable version (1.0.8) of MPICH2 (
> http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads
> )?
>
> Regards,
> Jayesh
>
>  ------------------------------
> *From:* mpich-discuss-bounces at mcs.anl.gov [mailto:
> mpich-discuss-bounces at mcs.anl.gov] *On Behalf Of *Seifer Lin
> *Sent:* Monday, December 08, 2008 12:47 AM
> *To:* mpich-discuss at mcs.anl.gov
> *Subject:* [mpich-discuss] MPICH2 1.0.6p1 & Windows HPC Server 2008
> (badperformance)
>
>   Hi everyone:
>
> I have a cluster of 4 nodes, all of them are with Windows HPC server 2008
> installed.
> I make all of the 4 nodes in the same workgroup. I use MPICH2 1.0.6p1 from
> Argonne Lab.
> And then
> 1. firewall of all 4 nodes are turned off
> 2. UAC (User Account Control) of all 4 nodes are turned off
> 3. I start smpd.exe (1.0.6p1 x64) in all the 4 nodes
>
> And I run a very simple MPI program (test_mpich2.exe)
>
> #include "mpi.h"
> #include <iostream>
> int main(int argc, char **argv)
> {
>     int cpuid, ncpu;
>     MPI_Init(&argc, &argv);
>     MPI_Comm_size(MPI_COMM_WORLD, &ncpu);
>     MPI_Comm_rank(MPI_COMM_WORLD, &cpuid);
>     printf("NCPU:%d, CPUID:%d\n", ncpu, cpuid);
>     fflush(stdout);
>     printf("start barrier\n"); fflush(stdout);
>     MPI_Barrier(MPI_COMM_WORLD);
>     printf("end barrier\n"); fflush(stdout);
>     MPI_Finalize();
>     return 0;
> }
>
> The command is
> mpiexec -hosts 2 192.168.1.1 192.168.1.2
> \\192.168.1.1\shared\test_mpich2.exe
>
> And the MPI_Barrier(...) function costs 10 seconds to return !!!!!
>
> If the same code is running on a Windows XP cluster, MPI_Barrier(...)
> returns at once!
>
>
> Does anyone know how to solve this problem on Windows HPC Server 2008 ?
> (Windows Vista has the same problem, too)
>
> regards,
>
> Seifer Lin
>
>
>
>
>
>
>
>
>
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