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liburing is a new optional dependency (WITH_URING=auto|yes|no) that replaces libaio when it is available. aio_uring: class which wraps io_uring stuff aio_uring::bind()/unbind(): optional optimization aio_uring::submit_io(): mutex prevents data race. liburing calls are thread-unsafe. But if you look into it's implementation you'll see atomic operations. They're used for synchronization between kernel and user-space only. That's why our own synchronization is still needed. For systemd, we add LimitMEMLOCK=524288 (ulimit -l 524288) because the io_uring_setup system call that is invoked by io_uring_queue_init() requests locked memory. The value was found empirically; with 262144, we would occasionally fail to enable io_uring when using the maximum values of innodb_read_io_threads=64 and innodb_write_io_threads=64. aio_uring::thread_routine(): Tolerate -EINTR return from io_uring_wait_cqe(), because it may occur on shutdown on Ubuntu 20.10 (Groovy Gorilla). This was mostly implemented by Eugene Kosov. Systemd integration and improved startup/shutdown error handling by Marko Mäkelä. |
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| .. | ||
| aws_sdk | ||
| mariabackup | ||
| readline | ||
| wolfssl | ||
| charset2html.c | ||
| CMakeLists.txt | ||
| comp_err.c | ||
| innochecksum.cc | ||
| my_print_defaults.c | ||
| mysql_waitpid.c | ||
| mysqld_safe_helper.c | ||
| perror.c | ||
| replace.c | ||
| resolve_stack_dump.c | ||
| resolveip.c | ||