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svcrdma: Optimize svc_rdma_cc_init()

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The atomic_inc_return() in svc_rdma_send_cid_init() is expensive.

Some svc_rdma_chunk_ctxt's now reside in long-lived container
structures. They don't need a fresh completion ID for every I/O
operation.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2023-12-11 10:24:15 -05:00
parent 28ee0ec894
commit 2a95ce479e
3 changed files with 7 additions and 6 deletions
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2
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
View File

@ -123,7 +123,7 @@ svc_rdma_recv_ctxt_alloc(struct svcxprt_rdma *rdma)
dma_addr_t addr;
void *buffer;
ctxt = kmalloc_node(sizeof(*ctxt), GFP_KERNEL, node);
ctxt = kzalloc_node(sizeof(*ctxt), GFP_KERNEL, node);
if (!ctxt)
goto fail0;
buffer = kmalloc_node(rdma->sc_max_req_size, GFP_KERNEL, node);

9
net/sunrpc/xprtrdma/svc_rdma_rw.c
View File

@ -154,7 +154,10 @@ static int svc_rdma_rw_ctx_init(struct svcxprt_rdma *rdma,
void svc_rdma_cc_init(struct svcxprt_rdma *rdma,
struct svc_rdma_chunk_ctxt *cc)
{
svc_rdma_send_cid_init(rdma, &cc->cc_cid);
struct rpc_rdma_cid *cid = &cc->cc_cid;
if (unlikely(!cid->ci_completion_id))
svc_rdma_send_cid_init(rdma, cid);
INIT_LIST_HEAD(&cc->cc_rwctxts);
cc->cc_sqecount = 0;
@ -221,15 +224,13 @@ svc_rdma_write_info_alloc(struct svcxprt_rdma *rdma,
{
struct svc_rdma_write_info *info;
info = kmalloc_node(sizeof(*info), GFP_KERNEL,
info = kzalloc_node(sizeof(*info), GFP_KERNEL,
ibdev_to_node(rdma->sc_cm_id->device));
if (!info)
return info;
info->wi_rdma = rdma;
info->wi_chunk = chunk;
info->wi_seg_off = 0;
info->wi_seg_no = 0;
svc_rdma_cc_init(rdma, &info->wi_cc);
info->wi_cc.cc_cqe.done = svc_rdma_write_done;
return info;

2
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View File

@ -122,7 +122,7 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
void *buffer;
int i;
ctxt = kmalloc_node(struct_size(ctxt, sc_sges, rdma->sc_max_send_sges),
ctxt = kzalloc_node(struct_size(ctxt, sc_sges, rdma->sc_max_send_sges),
GFP_KERNEL, node);
if (!ctxt)
goto fail0;