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nvme: cache values in nvme_tcp_req_complete

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nvme_tcp_req_complete_safe caches values on
the request, so that we can free the request *before*
completing it.  This allows the recently completed
req to get reused in full queue depth workloads, if
the callback function submits a new I/O.

So do this nvme_tcp_req_complete as well, to make
all of the completion paths identical.  The paths
that were calling nvme_tcp_req_complete previously
are all non-fast-path, so the extra overhead is
not important.

This allows us to call nvme_tcp_req_complete from
nvme_tcp_req_complete_safe to reduce code duplication,
so do that in this patch as well.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I876cea5ea20aba8ccc57d179e63546a463a87b35
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13521
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
This commit is contained in:
Jim Harris 2022-06-30 20:30:20 +00:00 committed by Tomasz Zawadzki
parent d1179a5801
commit 21d15cb043
1 changed files with 15 additions and 20 deletions
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35
lib/nvme/nvme_tcp.c
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@ -152,6 +152,8 @@ static void nvme_tcp_send_h2c_data(struct nvme_tcp_req *tcp_req);
static int64_t nvme_tcp_poll_group_process_completions(struct spdk_nvme_transport_poll_group
*tgroup, uint32_t completions_per_qpair, spdk_nvme_disconnected_qpair_cb disconnected_qpair_cb);
static void nvme_tcp_icresp_handle(struct nvme_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu);
static void nvme_tcp_req_complete(struct nvme_tcp_req *tcp_req, struct nvme_tcp_qpair *tqpair,
struct spdk_nvme_cpl *rsp);
static inline struct nvme_tcp_qpair *
nvme_tcp_qpair(struct spdk_nvme_qpair *qpair)
@ -613,12 +615,6 @@ nvme_tcp_req_init(struct nvme_tcp_qpair *tqpair, struct nvme_request *req,
static inline bool
nvme_tcp_req_complete_safe(struct nvme_tcp_req *tcp_req)
{
struct spdk_nvme_cpl cpl;
spdk_nvme_cmd_cb user_cb;
void *user_cb_arg;
struct spdk_nvme_qpair *qpair;
struct nvme_request *req;
if (!(tcp_req->ordering.bits.send_ack && tcp_req->ordering.bits.data_recv)) {
return false;
}
@ -633,18 +629,7 @@ nvme_tcp_req_complete_safe(struct nvme_tcp_req *tcp_req)
tcp_req->tqpair->async_complete++;
}
/* Cache arguments to be passed to nvme_complete_request since tcp_req can be zeroed when released */
memcpy(&cpl, &tcp_req->rsp, sizeof(cpl));
user_cb = tcp_req->req->cb_fn;
user_cb_arg = tcp_req->req->cb_arg;
qpair = tcp_req->req->qpair;
req = tcp_req->req;
TAILQ_REMOVE(&tcp_req->tqpair->outstanding_reqs, tcp_req, link);
nvme_tcp_req_put(tcp_req->tqpair, tcp_req);
nvme_free_request(tcp_req->req);
nvme_complete_request(user_cb, user_cb_arg, qpair, req, &cpl);
nvme_tcp_req_complete(tcp_req, tcp_req->tqpair, &tcp_req->rsp);
return true;
}
@ -761,15 +746,25 @@ nvme_tcp_req_complete(struct nvme_tcp_req *tcp_req,
struct nvme_tcp_qpair *tqpair,
struct spdk_nvme_cpl *rsp)
{
struct nvme_request *req;
struct spdk_nvme_cpl cpl;
spdk_nvme_cmd_cb user_cb;
void *user_cb_arg;
struct spdk_nvme_qpair *qpair;
struct nvme_request *req;
assert(tcp_req->req != NULL);
req = tcp_req->req;
/* Cache arguments to be passed to nvme_complete_request since tcp_req can be zeroed when released */
memcpy(&cpl, rsp, sizeof(cpl));
user_cb = req->cb_fn;
user_cb_arg = req->cb_arg;
qpair = req->qpair;
TAILQ_REMOVE(&tcp_req->tqpair->outstanding_reqs, tcp_req, link);
nvme_tcp_req_put(tqpair, tcp_req);
nvme_complete_request(req->cb_fn, req->cb_arg, req->qpair, req, rsp);
nvme_free_request(req);
nvme_complete_request(user_cb, user_cb_arg, qpair, req, &cpl);
}
static void