[mvapich-discuss] MVAPICH 2.1 check commications device

[Novosielski, Ryan]

BTW, sorry about the subject line -- something chewed it up. Maybe barfs on a question mark somewhere along the line? 

OK, thanks, I thought that might be the one, but it doesn't say for sure in the documentation.

# mpiname -a
MVAPICH2 2.1 Fri Apr 03 20:00:00 EDT 2015 ch3:mrail

Compilation
CC: icc    -DNDEBUG -DNVALGRIND -O2
CXX: icpc   -DNDEBUG -DNVALGRIND -O2
F77: ifort   -O2
FC: ifort   -O2

Configuration
--prefix=/opt/sw/packages/intel-16.0.1/mvapich2/2.1 --with-pmi=pmi2 --with-pm=slurm

--
____ *Note: UMDNJ is now Rutgers-Biomedical and Health Sciences*
 || \\UTGERS      |---------------------*O*---------------------
 ||_// Biomedical | Ryan Novosielski - Senior Technologist
 || \\ and Health | novosirj at rutgers.edu - 973/972.0922 (2x0922)
 ||  \\  Sciences | OIRT/High Perf & Res Comp - MSB C630, Newark
      `'
________________________________________
From: hari.subramoni at gmail.com [hari.subramoni at gmail.com] On Behalf Of Hari Subramoni [subramoni.1 at osu.edu]
Sent: Wednesday, December 09, 2015 12:02 PM
To: Novosielski, Ryan
Cc: mvapich-discuss at cse.ohio-state.edu
Subject: Re:

Hi Ryan,

Please run after setting "MV2_SHOW_ENV_INFO=1". MVAPICH2 will print out the HCA being used.

Could you also share the output of <install_path>/bin/mpiname -a? If MVAPICH2 were configured in the default way, it should always use the IB HCA instead of the Ethernet one. Please look at the following section of the userguide for more info about how to configure and build MVAPICH2.

http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.2b-userguide.html#x1-120004.4

Regards,
Hari.

On Wed, Dec 9, 2015 at 11:57 AM, Novosielski, Ryan <novosirj at ca.rutgers.edu<mailto:novosirj at ca.rutgers.edu>> wrote:
X-MS-Exchange-CrossTenan
Is there an environment variable or something I can set that will confirm which network device is being used for communication? It appears as if my hosts may be using Ethernet instead of Infiniband, which is very strange. I'm using MPAPICH2 2.1 via PMI2 (using SLURM).

--
____ *Note: UMDNJ is now Rutgers-Biomedical and Health Sciences*
 || \\UTGERS      |---------------------*O*---------------------
 ||_// Biomedical | Ryan Novosielski - Senior Technologist
 || \\ and Health | novosirj at rutgers.edu<mailto:novosirj at rutgers.edu> - 973/972.0922<tel:973%2F972.0922> (2x0922)
 ||  \\  Sciences | OIRT/High Perf & Res Comp - MSB C630, Newark
      `'

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