Charm++ parallel programming system

[Gengbin Zheng <zhenggb AT gmail.com>]

Hi Russ,
 
  ibverbs is still an experimental version in charm. Only recently we discovered some limitation in charmrun that prevented it from starting processes on more than 1024 cores. We are working on fixing this issue in charmrun/ibverbs. 
Please stay tuned for our next release. For now, please use mvapich version of charm on over 1024 processors.

Gengbin

On Mon, Mar 1, 2010 at 1:18 PM, <Russ.Brown AT sun.com> wrote:

Hi,

I'm using an "ibverbs" version of charmrun to initiate parallel
execution of NAMD.  Charmrun aborts for more than 1024 processes.  I
have set ++batch 8.  When I set ++batch 16, charmrun aborts for any
number of processes.  I have tried ++maxrsh 16 and ++maxrsh 32, as well
as ++timeout 2, with no effect.

Any ideas how I can initiate parallel execution for more than 1024
processes?

Thanks,

Russ Brown

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