[MPICH] MPI_Bcast hangs in Windows XP

[Richard Li]

Hi 
there,
 
I am writing an 
application in Windows XP/VC8 and am having problem with MPI_Bcast(). I am 
working in corporate environment and suspect it may have something to do with 
our security policies, however, I don't know exact which low-level operations 
failed . 
 
Here is the symptom: 
my application (as well as cpi.exe example) works fine as long as there is only one 
machine in the machine file, whether its local machine or remote does not 
matter. It hangs at MPI_Bcast() when I have more than one machine in 
MPI_COMM_WORLD. I am using mpich2-1.0.5p2-win32-ia32.msi.
 
The same application 
worked perfectly a year ago and there have been many security policy changes 
since that time(as usual, all policies reduce our freedom). My question is that 
what's the communication mechanism used in inter-node communication. I tried 
nothing, auto, sock, ssm as communication channels and had no 
luck.
 
Thanks for your 
help.

Richard

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