[mpich-discuss] Can I force MPICH to use TCP communication within a node

[Kenneth Raffenetti]

You can set the environment variable MPIR_CVAR_CH3_NOLOCAL=1 to force 
this in 3.0.4 and newer versions.

Ken

On 11/21/2016 11:15 PM, Kevin Buckley wrote:
> Apologies in advance, as this seems so basic that
> I can't belive I can't find it in the docs, however, I
> can't find it in the docs.
>
> I have just built an MPICH 3.0.4 and have used it to compile
> the SKaMPI test suite (all on an ArchLinux platform)
>
> I can run the test suite with a
>
> /path/to/mpirun -np 2 ./skampi -i ski/skampi_pt2pt.ski
>
> and it works, however, it's clearly (?) using the SHM channel
>
> ...
> [proxy:0:0 at host.do.ma.in] PMI response: cmd=get_result rc=0
> msg=success value=(vector,(0,1,1))
> [proxy:0:0 at host.do.ma.in] got pmi command (from 0): put
> kvsname=kvs_12233_0 key=sharedFilename[0] value=/dev/shm/mpich_shar_tmpUq7v2w
> [proxy:0:0 at host.do.ma.in] cached command:
> sharedFilename[0]=/dev/shm/mpich_shar_tmpUq7v2w
> ...
>
>
> I'm normally an OpenMPI man and I'd like to try and force
> MPICH to use a TCP/IP "channel" along the lines of telling
> OpenMPI to use a TCP/IP "trasnport" with a
>
> -mca btl tcp,self
>
> so, what's the MPICH incantation to achieve the same thing ?
>
> Yours, clearly missing something obvious,
> Kevin
> _______________________________________________
> discuss mailing list     discuss at mpich.org
> To manage subscription options or unsubscribe:
> https://lists.mpich.org/mailman/listinfo/discuss
>
_______________________________________________
discuss mailing list     discuss at mpich.org
To manage subscription options or unsubscribe:
https://lists.mpich.org/mailman/listinfo/discuss