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From: Code Master (cpp.codemaster_at_[hidden])
Date: 2007-05-18 16:36:50


Suppose if I want to capture any packets for my openmpi program, if I can't
filter packets by ports, then how can the sniffer tell which packets are
from/to any processes of my penmpi program?

On 5/19/07, Tim Prins <tprins_at_[hidden]> wrote:
>
> Open MPI uses TCP, and does not use any fixed ports. We use whatever ports
> the
> operating system gives us. At this time there is no way to specify what
> ports
> to use.
>
> Hope this helps,
>
> Tim
>
> On Friday 18 May 2007 05:19 am, Code Master wrote:
> > I run my openmpi-based application in a multi-node cluster. There is
> also
> > a sniffer computer (installed with wireshark) attached to a listener
> port
> > on the switch to sniff any packets.
> >
> > However I would like to know the protocol (UDP or TCP) as well as the
> ports
> > used by openmpi for interprocess communication so that wireshark can
> only
> > capture these packets.
> >
> > Thanks!
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