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Subject: Re: [OMPI devel] failure with zero-length Reduce()andbothsbuf=rbuf=NULL
From: George Bosilca (bosilca_at_[hidden])
Date: 2010-02-10 13:28:14


In not throwing my $.02 cent on this discussion ;)

On Feb 10, 2010, at 12:50 , Lisandro Dalcin wrote:

> PS: The following question is unrelated to this thread, but my
> curiosity+laziness cannot resist... Does Open MPI has some MCA
> parameter to add a synchronization at every collective call?

Yes we do. There is a special collective component, that will activate itself along with the selected one. "ompi_info --param coll sync" will show you the MCA parameters you need to set in order to activate it.

  george.