It's not a bug - that is normal behavior. The processes are polling hard to 
establish the connections as quickly as possible.


On Sep 1, 2010, at 7:24 PM, lyb wrote:

> Hi, All,
> 
> I tested two sample applications on Windows 2003 Server, one use 
> MPI_Comm_accept and other use MPI_Comm_connect, 
> when run into MPI_Comm_accept or MPI_Comm_connect, the application use 100% 
> one cpu core.  Is it a bug or some wrong?
> 
> I tested with three version including Version 1.4 (stable), Version 1.5 
> (prerelease) and trunk 23706 version.
> 
> ...
> MPI_Open_port(MPI_INFO_NULL, port);
> MPI_Comm_accept( port, MPI_INFO_NULL, 0, MPI_COMM_WORLD,    &client );
> ...
> 
> ...
> MPI_Comm_connect( port, MPI_INFO_NULL, 0, MPI_COMM_WORLD,    &server );
> ...
> 
> thanks a lot.
> 
> lyb
> 
> 
> 
> 
> 
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