`uv_thread_setname()` sets the name of the current thread. Different
platforms define different limits on the max number of characters
a thread name can be: Linux, IBMi (16), macOS (64), Windows (32767),
and NetBSD (32), etc. `uv_thread_setname()` will truncate it in case
`name` is larger than the limit of the platform.
`uv_thread_getname()` gets the name of the thread specified by `tid`.
The thread name is copied into the buffer pointed to by `name`. The
`size` parameter specifies the size of the buffer pointed to by `name`.
The buffer should be large enough to hold the name of the thread plus
the trailing NUL, or it will be truncated to fit.
This commit introduces the `uv_thread_detach` for thread detaching,
allowing threads to be detached state on both UNIX and Windows platforms.
Signed-off-by: Juan José Arboleda <soyjuanarbol@gmail.com>
The SQPOLL io_uring instance wasn't providing consistent behaviour to
users depending on kernel versions, load shape, ... creating issues
difficult to track and fix. Don't use this ring by default but allow
enabling it by calling `uv_loop_configure()` with
`UV_LOOP_ENABLE_IO_URING_SQPOLL`.
uv_udp_init() creates the UDP socket lazily but to set socket options
there must be, well, a socket to set the options on. Document how and
when that requirement is met.
Fixes: https://github.com/libuv/libuv/issues/4370
Add a process options flag to enable the optional behavior. Most users
are likely recommended to set this flag by default, but it was deemed
potentially breaking to set it by default in libuv.
Co-authored-by: Kyle Edwards <kyle.edwards@kitware.com>
Add uv_thread_setpriority for setting priority for threads created by
uv_thread_create. Add uv_thread_getpriority for getting thread priority.
For Linux by default, if the scheduling policy is SCHED_OTHER and the
priority is 0, we need to set the nice value.
Fixes: https://github.com/libuv/libuv/issues/4051
As promised in #2970, this attempts to migrate code to a common set of
utilities in a common place in the code and use them everywhere. This
also exports the functionality, since the Windows API with
WideCharToMultiByte is fairly verbose relative to what libuv and
libuv's clients typically need, so it is useful not to require clients
to reimplement this conversion logic unnecessarily (and because Windows
is not 64-bit ready here, but this implementation is.)
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.
