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(parent: 6bc01e7) | patch
svcrdma: Convert rdma->sc_rw_ctxts to llist
authorChuck Lever <chuck.lever@oracle.com>
Mon, 8 Feb 2021 20:33:16 +0000 (15:33 -0500)
committerChuck Lever <chuck.lever@oracle.com>
Tue, 17 Aug 2021 15:47:53 +0000 (11:47 -0400)
commit2e9a0d0f0c0074a8534be0067a05da8667f29e2f
tree33041cd8056c135ba9a00515345e78f7d4126f08tree | snapshot
parent6bc01e70f128ef69a473fe67b00ed49310d3cd35commit | diff
svcrdma: Convert rdma->sc_rw_ctxts to llist

Relieve contention on sc_rw_ctxt_lock by converting rdma->sc_rw_ctxts
to an llist.

The goal is to reduce the average overhead of Send completions,
because a transport's completion handlers are single-threaded on
one CPU core. This change reduces CPU utilization of each Send
completion by 2-3% on my server.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-By: Tom Talpey <tom@talpey.com>
include/linux/sunrpc/svc_rdma.h diff | blob | history
net/sunrpc/xprtrdma/svc_rdma_rw.c diff | blob | history
net/sunrpc/xprtrdma/svc_rdma_transport.c diff | blob | history
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