Nope, just one ethernet interface:
$ ifconfig
eth0 Link encap:Ethernet HWaddr 0E:47:0E:0B:59:27
inet addr:xxx.xxx.xxx.xxx Bcast:xxx.xxx.xxx.xxx
Mask:255.255.252.0
inet6 addr: fe80::c47:eff:fe0b:5927/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:9001 Metric:1
RX packets:16962 errors:0 dropped:0 overruns:0 frame:0
TX packets:11564 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:28613867 (27.2 MiB) TX bytes:1092650 (1.0 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:68 errors:0 dropped:0 overruns:0 frame:0
TX packets:68 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6647 (6.4 KiB) TX bytes:6647 (6.4 KiB)
--
Gary Jackson
From: users <users-boun...@open-mpi.org> on behalf of Gilles Gouaillardet
<gilles.gouaillar...@gmail.com>
Reply-To: Open MPI Users <us...@open-mpi.org>
List-Post: users@lists.open-mpi.org
Date: Tuesday, March 8, 2016 at 9:39 AM
To: Open MPI Users <us...@open-mpi.org>
Subject: Re: [OMPI users] Poor performance on Amazon EC2 with TCP
Jason,
how many Ethernet interfaces are there ?
if several, can you try again with one only
mpirun --mca btl_tcp_if_include eth0 ...
Cheers,
Gilles
On Tuesday, March 8, 2016, Jackson, Gary L. <gary.jack...@jhuapl.edu>
wrote:
I've built OpenMPI 1.10.1 on Amazon EC2. Using NetPIPE, I'm seeing about
half the performance for MPI over TCP as I do with raw TCP. Before I start
digging in to this more deeply, does anyone know what might cause that?
For what it's worth, I see the same issues with MPICH, but I do not see it
with Intel MPI.
--
Gary Jackson
