Charm++ parallel programming system

[Shad Kirmani <sxk5292 AT cse.psu.edu>]

I want to do MPI_Allgather on group. Having an allgather would have helped a lot. 

Thanks,

Shad

On Tue, Feb 28, 2012 at 4:29 PM, Ramprasad Venkataraman <ramv AT illinois.edu> wrote:

There is not yet a direct way to achieve an allgather in charm.

An immediate mechanism to achieve something like this would be to
perform a reduction using a CkReduction::set or a CkReduction::concat
reducer. The result of the reduction (gather) can then be broadcast to
all the contributing entities.However, data element ordering within
the result is not guaranteed and has to be achieved manually.

What charm entity do you want to do this on: group, chare array, section?

Ram

On Tue, Feb 28, 2012 at 15:12, Shad Kirmani <sxk5292 AT cse.psu.edu> wrote:
> Hello,
>
> I want to do an MPI_Allgather in charm code. Can anybody please help me with
> this?
>
> Thanks,
> Shad
>

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--
Ramprasad Venkataraman
Parallel Programming Lab
Univ. of Illinois