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06 10 2020
Manjunath Gorentla Venkata edited this page Jul 30, 2020
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1 revision
- Manjunath Gorentla Venkata
- Sergey Lebedev
- Valentin Petrov
- Alex Margolin
- Gil Bloch
- Pavel Shamis
- Naveen Ravi
https://github.com/manjugv/ucc_wg_public/blob/master/docs/UCC_V1.0_API_Draft_gorentla.pdf
###Specific topics discussed
- UCC thread model discussion
- Should UCC support all four models - SINGLE, MULTIPLE, SERIALIZED, FUNNELED
- Inclination towards supporting SINGLE, SERIALIZED, and MULTIPLE
- BFloat16 vs FP16 datatype for reduction ?
- What should UCC support ? BFloat16 or FP16 or both?
- Need more input
- Support for MPI_Comm_split with colors or the current UCC interface [2]
- Research the current literature and state of art
- When does buffer ownership transfer from user to library ?
- Two models (1) Transfer after ucc_collective_init() (2) Transfer after ucc_collective_finalized()
- Model 1 : Supports persistent collectives
- Model 2 : Supports RDMA based implementation
- Signature for OOB collective team creation
typedef struct ucc_team_oob_coll_t {
int (*allgather)(void *src_buf, void *recv_buf, size_t size,
void *allgather_info, void **request);
ucc_status_t (*req_test)(void *request);
ucc_status_t (*req_free)(void *request);
uint32_t participants;
void *coll_info;
} ucc_team_oob_coll_t
- June 17th, 2020