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io_uring: optimize io_uring_task layout

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task_work bits of io_uring_task are split into two cache lines causing
extra cache bouncing, place them into a separate cache line. Also move
the most used submission path fields closer together, so there are hot.

Cc: stable@vger.kernel.org # 5.15+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2022-06-20 15:27:35 +01:00 committed by Jens Axboe
parent bce5d70cd6
commit 4a0fef6278
1 changed files with 16 additions and 14 deletions
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30
io_uring/tctx.h
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@ -7,22 +7,24 @@
struct io_uring_task {
/* submission side */
int cached_refs;
struct xarray xa;
struct wait_queue_head wait;
const struct io_ring_ctx *last;
struct io_wq *io_wq;
struct percpu_counter inflight;
atomic_t inflight_tracked;
atomic_t in_idle;
int cached_refs;
const struct io_ring_ctx *last;
struct io_wq *io_wq;
struct file *registered_rings[IO_RINGFD_REG_MAX];
spinlock_t task_lock;
struct io_wq_work_list task_list;
struct io_wq_work_list prio_task_list;
struct callback_head task_work;
bool task_running;
struct xarray xa;
struct wait_queue_head wait;
atomic_t in_idle;
atomic_t inflight_tracked;
struct percpu_counter inflight;
struct file *registered_rings[IO_RINGFD_REG_MAX];
struct { /* task_work */
spinlock_t task_lock;
bool task_running;
struct io_wq_work_list task_list;
struct io_wq_work_list prio_task_list;
struct callback_head task_work;
} ____cacheline_aligned_in_smp;
};
struct io_tctx_node {