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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=804250915-08122008>Hi,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=804250915-08122008> Can you try out the latest stable version (1.0.8)
of MPICH2 (<A
href="http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads">http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads</A>)?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=804250915-08122008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=804250915-08122008>Regards,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=804250915-08122008>Jayesh</SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
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<FONT face=Tahoma size=2><B>From:</B> mpich-discuss-bounces@mcs.anl.gov
[mailto:mpich-discuss-bounces@mcs.anl.gov] <B>On Behalf Of </B>Seifer
Lin<BR><B>Sent:</B> Monday, December 08, 2008 12:47 AM<BR><B>To:</B>
mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> [mpich-discuss] MPICH2 1.0.6p1
& Windows HPC Server 2008 (badperformance)<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Hi everyone:</DIV>
<DIV> </DIV>
<DIV>I have a cluster of 4 nodes, all of them are with Windows HPC server 2008
installed.</DIV>
<DIV>I make all of the 4 nodes in the same workgroup. I use MPICH2 1.0.6p1 from
Argonne Lab.</DIV>
<DIV>And then</DIV>
<DIV>1. firewall of all 4 nodes are turned off</DIV>
<DIV>2. UAC (User Account Control) of all 4 nodes are turned off</DIV>
<DIV>3. I start smpd.exe (1.0.6p1 x64) in all the 4 nodes</DIV>
<DIV> </DIV>
<DIV>And I run a very simple MPI program (test_mpich2.exe)</DIV>
<DIV> </DIV>
<DIV>#include "mpi.h"<BR>#include <iostream></DIV>
<DIV>int main(int argc, char **argv)<BR>{<BR> int cpuid,
ncpu;<BR> MPI_Init(&argc,
&argv);<BR> MPI_Comm_size(MPI_COMM_WORLD,
&ncpu);<BR> MPI_Comm_rank(MPI_COMM_WORLD,
&cpuid);</DIV>
<DIV> printf("NCPU:%d, CPUID:%d\n", ncpu,
cpuid);<BR> fflush(stdout);</DIV>
<DIV> printf("start barrier\n");
fflush(stdout);<BR>
MPI_Barrier(MPI_COMM_WORLD);<BR> printf("end barrier\n");
fflush(stdout);</DIV>
<DIV> MPI_Finalize();</DIV>
<DIV> return 0;</DIV>
<DIV>}</DIV>
<DIV> </DIV>
<DIV>The command is </DIV>
<DIV>mpiexec -hosts 2 <A href="http://192.168.1.1">192.168.1.1</A> <A
href="http://192.168.1.2">192.168.1.2</A> <A
href="file://192.168.1.1/shared/test_mpich2.exe">\\192.168.1.1\shared\test_mpich2.exe</A></DIV>
<DIV> </DIV>
<DIV>And the MPI_Barrier(...) function costs 10 seconds to return !!!!!</DIV>
<DIV> </DIV>
<DIV>If the same code is running on a Windows XP cluster, MPI_Barrier(...)
returns at once!</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Does anyone know how to solve this problem on Windows HPC Server 2008 ?
(Windows Vista has the same problem, too)</DIV>
<DIV> </DIV>
<DIV>regards,</DIV>
<DIV> </DIV>
<DIV>Seifer Lin</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
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