| commit | 8e725c0ddefa33e514b61e7c3b94aa87aeb957d8 | [log] [tgz] |
|---|---|---|
| author | Carl Lerche <me@carllerche.com> | Wed Sep 05 14:21:25 2018 -0700 |
| committer | GitHub <noreply@github.com> | Wed Sep 05 14:21:25 2018 -0700 |
| tree | f1a54c6fe2871203ca5fd2ba837bfb9e89fa158f | |
| parent | 152893c4f17da93c2f7d6a672506272956cfab8a [diff] |
Reduce spurious awaken calls (#875) When a registration is signalled from a side thread and the main thread is blocke in `poll`, a pipe is used to interrupt the blocked `poll` call. However, this pipe write is expensive and should only be made when `poll` is blocked. To avoid spurrious calls, the readiness queue tracks a `sleep_token`. When a node is scheduled, it checks if the `sleep_token` is present. If it is, it writes to the pipe to wake up the main thread. Currently, the `sleep_token` isn't cleared when the blocking call to `poll` wakes up naturally. This results in the next registration signal to write to the pipe even though the main thread is not blocked. This patch clears the `sleep_token` when the blocking call returns. Fixes #785
Mio is a lightweight I/O library for Rust with a focus on adding as little overhead as possible over the OS abstractions.
API documentation
This is a low level library, if you are looking for something easier to get started with, see Tokio.
To use mio, first add this to your Cargo.toml:
[dependencies] mio = "0.6"
Then, add this to your crate root:
extern crate mio;
The following are specifically omitted from Mio and are left to the user or higher-level libraries.
Currently supported platforms:
There are potentially others. If you find that Mio works on another platform, submit a PR to update the list!
A group of Mio users hang out in the #mio channel on the Mozilla IRC server (irc.mozilla.org). This can be a good place to go for questions.
Interested in getting involved? We would love to help you! For simple bug fixes, just submit a PR with the fix and we can discuss the fix directly in the PR. If the fix is more complex, start with an issue.
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