Re: [OMPI users] Gigabit ethernet (PCI Express) and openmpi v1.2.4

[George Bosilca]

You should run a shared memory test, to see what's the max memory bandwidth you can get.

  Thanks,
    george.

On Dec 17, 2007, at 7:14 AM, Gleb Natapov wrote:

On Sun, Dec 16, 2007 at 06:49:30PM -0500, Allan Menezes wrote:

Hi,

netpipe NPmpi and openmpi mpirun?

for three pci express cards ( one built into the motherboard) i get

and NPtcp and NPmpi and openmpi. For two it seems there is a linear
increase in b/w but not for three pci express gigabit eth cards.

file for latency and percentage b/w .
Please advise.

How many PCI-Express Gigabit ethernet cards does OpenMPI version 1.2.4 support with a corresponding linear increase in bandwith measured with With two PCI express cards I get a B/W of 1.75Gbps for 892Mbps each ans 1.95Gbps. They all are around 890Mbs indiviually measured with netpipe I have tune the cards using netpipe and $HOME/.openmpi/mca- params.conf

What is in your $HOME/.openmpi/mca-params.conf? May be are hitting your

chipset limit here. What is your HW configuration? Can you try to run
NPtcp on each interface simultaneously and see what BW do you get.

--
                        Gleb.
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