On 2021/2/10 3:54, Jason Gunthorpe wrote: > 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 > Hi Jason, I'm confused about how to introduce DCA in man pages. Current man pages in rdma-core can be classifed into public and vendor-defined ones. For example, ibv_create_qp.3 in libibverbs/man and mlx5dv.7 in providers/mlx5/man, but most of them is a description for a single interface. If we want to explain how to use DCA and how does it work, should we put a hns_dca.x file in providers/hns/man? Or add a file about hns_dca_open_device() and introduce DCA in it? And another question, I know the files with a number suffix like ibv_create_qp.3 is for man pages in linux. What about the markdown files with .md suffix like ibv_fork_init.3.md? If we want to add a new one about DCA, which type should we choose? Thanks Weihang
