How to use UCX with io_uring?

[MoFHeka]

I noticed there are some APIs about epoll in UCX. It's possible to use io_uring?

[yosefe]

hi @MoFHeka , currently UCX does not support io_uring, which use case did you have in mind for it/

[MoFHeka]

@yosefe A RPC-like application using UCX.
Polling ucp_worker_progress in the user thread , or polling register fd changing in the system thread and call ucp_worker_progress somewhere, which one would reach the best performance

[yosefe]

@MoFHeka there is UCX API to wait on a file descriptor - see ucp_worker_get_efd and ucp_worker_arm

Is it relevant for your use case?

[MoFHeka]

It seems that the performance will not be good, perhaps implementing a user-mode UCX ucp_worker_progress polling thread would be a better choice?