io_uring_submit_and_wait(3) — Linux manual page

io_uring_submit_and_wait(3)  liburing Manual io_uring_submit_and_wait(3)

NAME

       io_uring_submit_and_wait - submit requests to the submission
       queue and wait for completion

SYNOPSIS

       #include <liburing.h>

       int io_uring_submit_and_wait(struct io_uring *ring,
                                    unsigned wait_nr);

DESCRIPTION

       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.

RETURN VALUE

       On success io_uring_submit_and_wait(3) returns the number of
       submitted submission queue entries. On failure it returns -errno.

SEE ALSO

       io_uring_queue_init_params(3), io_uring_get_sqe(3),
       io_uring_submit(3), io_uring_submit_and_wait_timeout(3)

COLOPHON

       This page is part of the liburing (A library for io_uring)
       project.  Information about the project can be found at 
       ⟨https://github.com/axboe/liburing⟩.  If you have a bug report for
       this manual page, send it to io-uring@vger.kernel.org.  This page
       was obtained from the project's upstream Git repository
       ⟨https://github.com/axboe/liburing⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-03.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

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)

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