Durga,
You can find the answer to your questions in http://www.netlib.org/netlib/utk/people/JackDongarra/PAPERS/scop3.pdf
.
george.
On Nov 15, 2009, at 14:39 , Durga Choudhury wrote:
I apologize for dragging in this conversation in a different
direction, but I'd be very interested to know why the behavior with
the Playstation is different from other architectures. The PS3 box has
a single gigabit ethernet and no exapansion ports, so I'd assume it's
behavior would be no different than, e.g. a regular PC using the TCP
BTL. Perhaps it has something to do with the Cell BE architecture,
then. What was the reasoning behind this decision?
I am keen to know about such 'hybrid' parallel programming paradigm,
e.g. using Cell BE or NUMA or CUDA on top of an MPI (or even a grid
topology). I'd appreciate any pointers to any material in this
regards.
Durga
On Sun, Nov 15, 2009 at 4:48 PM, George Bosilca
<bosi...@eecs.utk.edu> wrote:
By default only one socket per peer per physical network is opened.
However,
Open MPI has the possibility to open multiple socket per peer per
network,
based on some experiments with the Playstation (where having
multiple socket
allow for more bandwidth). The MCA parameter that allows such
behavior is
btl_tcp_links.
george.
On Nov 13, 2009, at 17:59 , Charles Salvia wrote:
When using TCP, how many sockets does each process open per peer-
process?
Does each process open a single socket to connect to each peer-
process, or
does it use TWO sockets, one for sending, one for receiving?
Thanks,
-Charles Salvia
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