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Subject: Re: [OMPI users] users Digest, Vol 1674, Issue 1
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2010-09-09 05:47:35


I don't think it's really a fault -- it's just how we designed and implemented it.

On Sep 6, 2010, at 7:40 AM, lyb wrote:

> Thanks for your answer, but I test with MPICH2, it doesn't have this fault. Why?
>> Message: 9
>> Date: Wed, 1 Sep 2010 20:14:44 -0600
>> From: Ralph Castain<rhc_at_[hidden]>
>> Subject: Re: [OMPI users] MPI_Comm_accept and MPI_Comm_connect both
>> use 100% one cpu core. Is it a bug?
>> To: Open MPI Users<users_at_[hidden]>
>> Message-ID:<4E4BC153-B4E3-43E2-B980-904DABE78B4E_at_[hidden]>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> 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
>>> > > > > > > _______________________________________________
>>> > users mailing list
>>> > users_at_[hidden]
>>> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>
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-- 
Jeff Squyres
jsquyres_at_[hidden]
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