[mpich-discuss] shm and 1-copy approaches

[Darius Buntinas]

Yes, the shm and ssm channels have been replaced by the Nemesis channel, which should perform much better.

We don't support the ptrace method but we do now have support for knem, which is a linux kernel module that allows us to do 1-copy transfers between processes on the same node.  You can find knem in the mpich source tree under contrib/knem.  There's more info here: http://runtime.bordeaux.inria.fr/knem/

-d

On Oct 28, 2010, at 12:17 AM, Dave Turner wrote:

> 
>      I noticed in the recent release that the shm channel has been removed.  Is this
> replaced by the Nemesis work?
> 
>      I know there was some work done long ago on a 1-copy approach using ptrace.
> Has this ever been used, or any other 1-copy approaches been incorporated into MPICH2?
> 
>                Dave Turner
> 
> -- 
> Dr Dave Turner
> DrDaveTurner at gmail.com
> Cell:  515 451-3847
> _______________________________________________
> mpich-discuss mailing list
> mpich-discuss at mcs.anl.gov
> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss