But in many ways, it’s also not helpful to change the MTU from Open MPI. It
sounds like you made a bunch of changes all at once; I’d break them down and
build up. MTU is a very system-level configuration. Use a tcp transmission
test (iperf, etc.) to make sure TCP connections work between the
Alberto,
Are you saying the program hang even without jumbo frame (aka 1500 MTU) ?
At first, make sure there is no firewall running, and then you can try
mpirun --mca btl tcp,vader,self --mca oob_tcp_if_include eth0 --mca
btl_tcp_if_include eth0 ...
(Replace eth0 with the interface name you want
"ompi_info --param btl tcp -l 9" will give you all the TCP options.
Unfortunately, OMPI does not support programatically changing the value of
the MTU.
George.
PS: We would be happy to receive contributions from the community.
On Fri, May 5, 2017 at 10:29 AM, Alberto Ortiz
wrote:
> I am usi
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" escribió:
> If you are looking to use TCP packets, then you want to set the send/recv
> buffer size in
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 wrote:
>
> Hi,
> I have a program running with openMPI over a network using a gig
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 t
f Of Massimiliano Fatica
> Sent: Friday, August 25, 2006 1:30 AM
> To: us...@open-mpi.org
> Subject: [OMPI users] Jumbo frames
>
> Hi,
> I am trying to use Jumbo frames but mpirun will not start the job.
> I am using OpenMPI v1.1 shipped with the latest Rocks (4.2).
> Ifcon
Hi,
I am trying to use Jumbo frames but mpirun will not start the job.
I am using OpenMPI v1.1 shipped with the latest Rocks (4.2).
Ifconfig is reporting that all the NIC on the cluster are using an MTU
of 9000 and the switch (HP Procurve) should be able to use Jumbo
frames.
Is there any special
