On Sat, 30 Jun 2007, Maureen O Flynn wrote:
> I have a question about changing tcp socket sizes with
> 'rpi_tcp_sockbuf' at run time
> ...
> Note that in my program I set the send and receive socket buffers
> with the setsockopt(2) function as follows setting size to 131072.
After reading the above 2 phrases, it's totally unclear to me what you
are trying to do. Are you modifying the LAM/MPI library or deamons ?
Or you are just running a MPI program ?
If it's the latter, it's very uncommon what you are trying to do, so
maybe more details will help us understand better. In principle, a MPI
program should just use the LAM/MPI library as is, by calling the MPI
functions, independent of the underlying message passing mechanism. By
creating sockets yourself you are actually using a second data
transmission mechanism between the processes that belong to your job,
independent of the LAM/MPI one; in this case, if you are not calling
the MPI functions, there is no involvement of the MPI library in your
communication.
--
Bogdan Costescu
IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu_at_[hidden]
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