Web8 mei 2024 · So at the breakpoint at line 441, you can see from the last line of gdb output, that the call to io_uring_wait_cqe was successful, since its return value ret is zero. So why can't I read cqe->user_data with gdb? WebThe io_uring_submit_and_wait_timeout (3) function submits the next requests from the submission queue belonging to the ring and waits for wait_nr completion events, or until the timeout ts expires. The completion events are stored in the cqe_ptr array. The sigmask specifies the set of signals to block.
Index — Lord of the io_uring documentation - Unixism
Web27 mei 2024 · The io_uring Asynchronous I/O (AIO) framework is a new Linux I/O interface, first introduced in upstream Linux kernel version 5.1 (March 2024). It provides a low-latency and feature-rich interface for applications that require AIO functionality but prefer the kernel to perform the I/O. WebThe io_uring_wait_cqe_timeout(3) function waits for one IO completion to be available from the queue belonging to the ring param, waiting for it if necessary or until the timeout ts … curp youtube
io_uring_submit_and_wait_timeout(3) — Arch manual pages
Web11 apr. 2024 · But the user_data field in the completion queue entry is always zero. The documentation for io_uring says: user_data is common across op-codes, and is untouched by the kernel. It's simply copied to the completion event, cqe, when a completion event is posted for this request. Since the completions are not ordered the user_data field is … WebSystem calls io_uring_setup(2) Sets up an io_uring instance, application then mmap(2)’s the SQ and CQ ring memory. Returns a file descriptor, application closes fd when done (or on process exit). io_uring_enter(2) Informs the kernel about work to be done, waits for work to be completed, or both. io_uring_register(2) WebDESCRIPTION ¶ The io_uring_wait_cqe_timeout (3) function waits for one IO completion to be available from the queue belonging to the ring param, waiting for it if necessary or until the timeout ts expires. If an event is already available in the ring when invoked, no waiting will occur. The cqe_ptr param is filled in on success. curp tony