[LU-17442] too many ldlm threads running on client with many cores

Related — Thu, 18 Jan 2024 08:28:54 +0000

Newer client nodes have up to 192 cores, and it is likely that more cores will appear in short order.

The client runs 2-4 ldlm_cbCP_NN threads per CPT (32 for 192 cores), one ldlm_bl_NN thread per core, which is far too many since they are almost never active. It is unlikely that the client-side LDLM threads need to be per-CPT or per-core, and could instead have a fixed number of threads (e.g. sqrt(num_cores)) that are shared among all cores.

Whamcloud Community JIRA

[LU-17442] too many ldlm threads running on client with many cores