From e340c2d6ef2a8cdcc11672f8cc839c30ad360e52 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 11 Feb 2019 11:23:54 -0500 Subject: xprtrdma: Reduce the doorbell rate (Receive) Post RECV WRs in batches to reduce the hardware doorbell rate per transport. This helps the RPC-over-RDMA client scale better in number of transports. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- net/sunrpc/xprtrdma/verbs.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/sunrpc/xprtrdma/verbs.c') diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 4994e75945b8..b4e997d53ec7 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1480,6 +1480,8 @@ rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp) if (ep->rep_receive_count > needed) goto out; needed -= ep->rep_receive_count; + if (!temp) + needed += RPCRDMA_MAX_RECV_BATCH; count = 0; wr = NULL; -- cgit v1.2.3