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nvme: optimize struct spdk_nvme_qpair packing

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Group fields such that those not used in the I/O path
are at the end of the structure.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I43eca1faacd29a5bf34be6ee644191d865cd42a9
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11514
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
This commit is contained in:
Jim Harris 2022-02-09 21:54:06 +00:00
parent 56618eacb9
commit a97200ad45
1 changed files with 12 additions and 9 deletions
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21
lib/nvme/nvme_internal.h
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@ -455,7 +455,6 @@ struct spdk_nvme_qpair {
STAILQ_HEAD(, nvme_request) free_req;
STAILQ_HEAD(, nvme_request) queued_req;
STAILQ_HEAD(, nvme_request) aborting_queued_req;
/* List entry for spdk_nvme_transport_poll_group::qpairs */
STAILQ_ENTRY(spdk_nvme_qpair) poll_group_stailq;
@ -465,23 +464,27 @@ struct spdk_nvme_qpair {
/** Requests in this list will return error */
STAILQ_HEAD(, nvme_request) err_req_head;
/* List entry for spdk_nvme_ctrlr::active_io_qpairs */
TAILQ_ENTRY(spdk_nvme_qpair) tailq;
/* List entry for spdk_nvme_ctrlr_process::allocated_io_qpairs */
TAILQ_ENTRY(spdk_nvme_qpair) per_process_tailq;
struct spdk_nvme_ctrlr_process *active_proc;
struct spdk_nvme_transport_poll_group *poll_group;
void *poll_group_tailq_head;
void *req_buf;
const struct spdk_nvme_transport *transport;
/* Entries below here are not touched in the main I/O path. */
struct nvme_completion_poll_status *poll_status;
/* List entry for spdk_nvme_ctrlr::active_io_qpairs */
TAILQ_ENTRY(spdk_nvme_qpair) tailq;
/* List entry for spdk_nvme_ctrlr_process::allocated_io_qpairs */
TAILQ_ENTRY(spdk_nvme_qpair) per_process_tailq;
STAILQ_HEAD(, nvme_request) aborting_queued_req;
void *req_buf;
};
struct spdk_nvme_poll_group {