[mpich-discuss] MPI and threaded communication

[Pavan Balaji]

Currently, they'll be serialized by an internal lock, but we are working 
on finer-grained locking mechanisms which will allow them to transmit in 
parallel. We plan to have this in the 1.1 release, but the nightly 
snapshots should have a basic preview if you want to try it out (i.e., 
one lock that is used in a fine-grained manner). A multi-lock version 
will come in the next beta release of 1.1.

  -- Pavan

Joseph Gonzalez wrote, On 02/01/2009 05:15 PM:
> Hi,
> 
> We are building a threaded, event driven C++ wrapper for MPICH2.  We 
> would like to be able to simultaneously send and receive messages from 
> multiple threads in the same process.  If two threads simultaneous try 
> to send to two different rank destinations (on some remote machine) will 
> they both transmit simultaneously or is their an internal mutex that 
> will prohibit this from happening?
> 
> Thanks,
> Joey

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji