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Subject: Re: [OMPI users] How to run Open MPI over TCP (Ethernet)
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-05-22 06:30:33


Can you send the output of ifconfig on both compute-0-15.local and compute-0-16.local?

On May 22, 2014, at 3:30 AM, Bibrak Qamar <bibrakc_at_[hidden]> wrote:

> Hi,
>
> I am facing problem in running Open MPI using TCP (on 1G Ethernet). In practice the bandwidth must not exceed 1000 Mbps but for some data points (for point-to-point ping pong) it exceeds this limit. I checked with MPICH it works as desired.
>
> Following is the command I issue to run my program on TCP. Am I missing something?
>
> -bash-3.2$ mpirun -np 2 -machinefile machines -N 1 --mca btl tcp,self ./bandwidth.ompi
> --------------------------------------------------------------------------
> The following command line options and corresponding MCA parameter have
> been deprecated and replaced as follows:
>
> Command line options:
> Deprecated: --npernode, -npernode
> Replacement: --map-by ppr:N:node
>
> Equivalent MCA parameter:
> Deprecated: rmaps_base_n_pernode, rmaps_ppr_n_pernode
> Replacement: rmaps_base_mapping_policy=ppr:N:node
>
> The deprecated forms *will* disappear in a future version of Open MPI.
> Please update to the new syntax.
> --------------------------------------------------------------------------
> Hello, world. I am 1 on compute-0-16.local
> Hello, world. I am 0 on compute-0-15.local
> 1 25.66 0.30
> 2 25.54 0.60
> 4 25.34 1.20
> 8 25.27 2.42
> 16 25.24 4.84
> 32 25.49 9.58
> 64 26.44 18.47
> 128 26.85 36.37
> 256 29.43 66.37
> 512 36.02 108.44
> 1024 42.03 185.86
> 2048 194.30 80.42
> 4096 255.21 122.45
> 8192 258.85 241.45
> 16384 307.96 405.90
> 32768 422.78 591.32
> 65536 790.11 632.83
> 131072 1054.08 948.70
> 262144 1618.20 1235.94
> 524288 3126.65 1279.33
>
> -Bibrak
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-- 
Jeff Squyres
jsquyres_at_[hidden]
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