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Subject: Re: [OMPI users] question about algorithms for collective communication
From: Dorian Krause (doriankrause_at_[hidden])
Date: 2009-08-23 10:55:59


Hi,

a similar question was recently discussed on the mailing list:

http://www.open-mpi.org/community/lists/users/2009/08/10458.php

George Markomanolis wrote:
> Dear all,
>
> I am trying to figure out the algorithms that are used for some
> collective communications (allreduce, bcast, alltoall). Is there any
> document to explain which algorithms are used? For example I would
> like to know exactly how the command allreduce is analyzed to send and
> receive.
>
> Thanks a lot,
> Best regards,
> George Markomanolis
>
>
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