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io_uring_submit_and_wait(3) liburing Manual io_uring_submit_and_wait(3)
io_uring_submit_and_wait - submit requests to the submission queue and wait for completion
#include <liburing.h> int io_uring_submit_and_wait(struct io_uring *ring, unsigned wait_nr);
The io_uring_submit_and_wait(3) function submits the next requests from the submission queue belonging to the ring and waits for wait_nr completion events. After the caller retrieves a submission queue entry (SQE) with io_uring_get_sqe(3) and prepares the SQE, it can be submitted with io_uring_submit_and_wait(3). Ideally used with a ring setup with IORING_SETUP_SINGLE_ISSUER|IORING_SETUP_DEFER_TASKRUN as that will greatly reduce the number of context switches that an application will see waiting on multiple requests.
On success io_uring_submit_and_wait(3) returns the number of submitted submission queue entries. On failure it returns -errno.
io_uring_queue_init_params(3), io_uring_get_sqe(3), io_uring_submit(3), io_uring_submit_and_wait_timeout(3)
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liburing-2.1 November 15, 2021io_uring_submit_and_wait(3)
Pages that refer to this page: io_uring_submit(3), io_uring_submit_and_wait(3), io_uring_submit_and_wait_timeout(3)