[Mpi3-rma] Next RMA Telecon

Torsten Hoefler htor at illinois.edu
Mon Dec 26 12:12:56 CST 2011

On Mon, Dec 26, 2011 at 12:22:38AM -0600, Pavan Balaji wrote:
> On 12/09/2011 03:36 PM, Torsten Hoefler wrote:
>>> 3) allocate_shared proposal with MPI_Win_lock_all(exclusive)
>> - remove MPI_Win_lock_all(exclusive) from the proposal and re-read
> Why was this removed?
Brian and others felt that an implementation on a distributed-memory
network would put a huge burden on the implementers and may cause other
problems. A workaround offering essentially the same functionality by
using point-to-point and collective synchronization (i.e., block p-1
processes in a barrier while one process updates the shared memory) was

All the Best,

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Torsten Hoefler         | Performance Modeling and Simulation Lead
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