I am using version 1.10.6 on archlinux. The option I should pass to mpirun should then be "-mca btl_tcp_mtu 13000"? Just to be sure. Thank you, Alberto
El 5 may. 2017 16:26, "r...@open-mpi.org" <r...@open-mpi.org> escribió: > If you are looking to use TCP packets, then you want to set the send/recv > buffer size in the TCP btl, not the openib one, yes? > > Also, what version of OMPI are you using? > > > On May 5, 2017, at 7:16 AM, Alberto Ortiz <alberto.orti...@gmail.com> > wrote: > > > > Hi, > > I have a program running with openMPI over a network using a gigabit > switch. This switch supports jumbo frames up to 13.000 bytes, so, in order > to test and see if it would be faster communicating with this frame > lengths, I am trying to use them with my program. I have set the MTU in > each node to be 13.000 but when running the program it doesn't even > initiate, it gets blocked. I have tried different lengths from 1.500 up to > 13.000 but it doesn't work with any length. > > > > I have searched and only found that I have to set OMPI with "-mca > btl_openib_ib_mtu 13000" or the length to be used, but I don't seem to get > it working. > > > > Which are the steps to get OMPI to use larger TCP packets length? Is it > possible to reach 13000 bytes instead of the standard 1500? > > > > Thank yo in advance, > > Alberto > > _______________________________________________ > > users mailing list > > users@lists.open-mpi.org > > https://rfd.newmexicoconsortium.org/mailman/listinfo/users > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users >
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