Add io_uring support for several asynchronous file operations:
- read, write
- fsync, fdatasync
- stat, fstat, lstat
io_uring is used when the kernel is new enough, otherwise libuv simply
falls back to the thread pool.
Performance looks great; an 8x increase in throughput has been observed.
This work was sponsored by ISC, the Internet Systems Consortium.
Fixes: https://github.com/libuv/libuv/issues/1947
The maximum number of times timers should run when uv_run() is called
with UV_RUN_ONCE and UV_RUN_NOWAIT is 1. Do that by conditionally
calling timers before entering the while loop when called with
UV_RUN_DEFAULT.
The reason to always run timers at the end of the while loop, instead of
at the beginning, is to help enforce the conceptual event loop model.
Which starts when entering the event provider (e.g. calling poll).
Other than only allowing timers to be processed once per uv_run()
execution, the only other noticeable change this will show is if all the
following are true:
* uv_run() is called with UV_RUN_NOWAIT or UV_RUN_ONCE.
* An event is waiting to be received when poll is called.
* Execution time between the call to uv_timer_start() and entering the
while loop is longer than the timeout.
If all these are true, then timers that would have executed before
entering the event provider will now be executed afterward.
Fixes: https://github.com/libuv/libuv/issues/3686
Co-authored-by: Momtchil Momtchev <momtchil@momtchev.com>
The following metrics are now always recorded and available via the new
uv_metrics_info() API.
* loop_count: Number of event loop iterations.
* events: Total number of events processed by the event handler.
* events_waiting: Total number of events waiting in the event queue when
the event provider request was made.
Benchmarking has shown no noticeable impact recording these metrics.
PR-URL: https://github.com/libuv/libuv/pull/3749
Backported thread affinity feature and related dependency commits
from master. It will add support for those APIs: uv_cpumask_size,
uv_thread_setaffinity, uv_thread_getaffinity.
The supported platforms are Linux, Freebsd, and Windows.
Empty implementations (returning UV_ENOTSUP) on non-supported platforms
(such as OS X and AIX).
Replacement for the usage pattern where people use uv_cpu_info() as an
imperfect heuristic for determining the amount of parallelism that is
available to their programs.
Fixes#3493.
- Add `Makefile` for example codes. (cherry-pick from old uvbook repo)
- Add a new example "Default loop" to "Basics of libuv"/"Default loop"
- Document review and update: `Introduction`, `Basics of libuv`, `Filesystem`
+ Update the referenced libuv code snippet
+ Link update: http->https
**Content Updates**:
- `filesystem.rst`#L291-L297: Add note for `uv_fs_event_start`
- `filesystem.rst`#L334: Add description of the callback function parameter `status`
The following examples have been tested manually in WSL2 (Ubuntu 20.04) with libuv 1.42.0:
- helloworld
- default-loop
- idle-basic
- uvcat
- uvtee
- onchange (test on macOS)
Co-authored-by: Nikhil Marathe <nsm.nikhil@gmail.com>
`uv_try_write2(stream, bufs, nbufs, send_handle)` acts like
`uv_try_write()` and extended write function for sending handles over a
pipe like `uv_write2`. It always returns `UV_EAGAIN` instead of
`UV_ENOSYS` on Windows so we can easily write cross-platform code
without special treatment.
PR-URL: https://github.com/libuv/libuv/pull/3183
Reviewed-By: Jameson Nash <vtjnash@gmail.com>
Implementation is based on RLIMIT_MEMLIMIT.
Co-authored-by: Igor Todorovski <itodorov@ca.ibm.com>
PR-URL: https://github.com/libuv/libuv/pull/3133
Reviewed-By: Richard Lau <rlau@redhat.com>
The Linux kernel suppresses some ICMP error messages by default for UDP
sockets. This commit sets IP_RECVERR/IPV6_RECVERR on the socket to
enable full ICMP error reporting, hopefully resulting in faster failover
to working name servers.
PR-URL: https://github.com/libuv/libuv/pull/2872
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
PR-URL: https://github.com/libuv/libuv/pull/3061
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Equivalents of `pipe` and `socketpair` for cross-platform use.
PR-URL: https://github.com/libuv/libuv/pull/2953
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
The behavior of `uv_read_start()` when the handle is closing or already
busy reading wasn't consistent across platforms. Now it is.
Fixes: https://github.com/libuv/help/issues/137
PR-URL: https://github.com/libuv/libuv/pull/2795
Reviewed-By: Jameson Nash <vtjnash@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Bartosz Sosnowski <bartosz@janeasystems.com>
Added notes to documentation of `uv_poll_t`:
- The callback will be called over-and-over again as long as the socket
remains readable/writable.
- uv_poll_stop() cancels pending callbacks of already happened events.
Fixes: https://github.com/libuv/libuv/issues/1078
PR-URL: https://github.com/libuv/libuv/pull/1100
Co-authored-by: Jameson Nash <vtjnash@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
It defers the error to uv_listen() or uv_tcp_connect().
PR-URL: https://github.com/libuv/libuv/pull/2218
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Jameson Nash <vtjnash@gmail.com>
