Table of contentsSlide 1
The V1.0 UPC Collectives Spec
Collective functions
Remaining collectives spec issues (large and small)
Wording used to specify the affinity of certain arguments
{signed} option for types supported by reduce and prefix reduce operations
What requirements are made of the phase of function arguments?
Associativity and commutative reduce and prefix reduce operations
Alternative Synchronization semantics
Synch semantic naming ideas
Can nbytes be 0 in 5.3 functions?
1. Synchronization phase
2. Bill’s strict semantic
3. Affinity-based semantics
4. “Split-phase” semantics
What are the synchronization semantics?
void upc_all_broadcast(dst, src, blk);
void upc_all_scatter(dst, src, blk);
void upc_all_gather(dst, src, blk);
void upc_all_gather_all(dst, src, blk);
void upc_all_exchange(dst, src, blk);
void upc_all_permute(dst, src, perm, blk);
int upc_all_reduceI(src, UPC_ADD, n, blk, NULL);
void upc_all_prefix_reduceI(dst, src, UPC_ADD, n, blk, NULL);
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Slide 27
Extensions
More sophisticated synchronization semantics
Slide 30
Commutativity of reduce and prefix reduce operations
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