On 08/28/2013 03:47 PM, Barrett, Brian W wrote:

And, further, I believe that:

X = 0 Win_lock_all Recv do { compiler_fence(); } while (0 == X);

will eventually complete on any platform that supports UNIFIED, as the public and private copies are eventually consistent. This gives us the behaviors necessary for implementing SHMEM on MPI-3.

Right, good point. We could retain the definition that the public and private windows will eventually be the same without additional MPI calls. With that in mind, does requiring WIN_SYNC for immediate synchronization of the two windows + a statement that there might be implementation-specific ways (e.g., memory barriers) to do the same sound reasonable from an OpenSHMEM point-of-view? -- Pavan -- Pavan Balaji http://www.mcs.anl.gov/~balaji