10 Feb
2021
10 Feb
'21
3:53 a.m.
On Sun, Feb 07, 2021 at 11:12:49AM +0800, Weihang Li wrote:
The HIP09 introduces the DCA(Dynamic Context Attachment) feature which supports many RC QPs to share the WQE buffer in a memory pool. If a QP enables DCA feature, the WQE's buffer will not be allocated when creating but when the users start to post WRs. This will reduce the memory consumption when there are too many QPs are inactive.
One a WQE buffer is allocated it still acts as a normal WQE ring buffer? So this DCA logic is to remap the send queue buffer based on demand for SQEs? How does it interact with the normal max send queue entries reported?
Would like to see proper man pages explaining how this all works for rdma-core.
Jason