On Nov 23, 2010, at 3:23 PM, <ananda.mudar_at_[hidden]> <ananda.mudar_at_[hidden]> wrote:
> However this error message goes away, if I initialize MPI with threads ie; MPI_Init_thread(). Can anyone explain this discrepancy?
What thread level are you invoking MPI_INIT_THREAD with?
One possible reason this could be happening is that the openib BTL is excluding itself if you use MPI_THREAD_MULTIPLE. The openib BTL is the entity that is responsible for the fork warning -- if it's not being used, then no warning is issued because there is no problem with forking.
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