Some puzzled problems about algorithm

[Luckyton]

Hello,

I have been reading ucc source code of version 1.3.0 and found some puzzled problems releated to algorithm.

Firstly, there is no default ucc_msg_range_t for scatter at score map of tl_ucp component. When creating scatter task with UCC_CLS=basic and UCC_CL_BASIC_TLS=ucp, which init function will be called ?

Secondly, when length of message is bigger than 4k, there is no ucc_msg_range_t for allreduce and bcast at score map of cl_hier component. When creating task with UCC_CLS=hier and UCC_CL_HIER_TLS=ucp, which init function will be called ?

Lastly, the processing procedure of knomial scatter algorithm at tl_ucp component is shown in the following figure. I doesn't seem to have achieved scatter option. Because it doesn't send ith segment to rank i. Am I right ?

thank you!