glommio

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What is Glommio?

Glommio (pronounced glo-mee-jow or |glomjəʊ|) is a Cooperative Thread-per-Core crate for Rust & Linux based on io_uring. Like other rust asynchronous crates it allows one to write asynchronous code that takes advantage of rust async/await, but unlike its counterparts it doesn't use helper threads anywhere.

Using Glommio is not hard if you are familiar with rust async. All you have to do is:

    use glommio::prelude::*;
    LocalExecutorBuilder::new().spawn(|| async move {
        /// your code here
    }).unwrap();

Please note Glommio requires at least 512 KiB of locked memory for io_uring to work. You can increase the memlock resource limit (rlimit) as follows:

$ vi /etc/security/limits.conf
*    hard    memlock        512
*    soft    memlock        512

To make the new limits effective, you need to login to the machine again. You can verify that the limits are updated by running the following:

$ ulimit -l
512

Glommio also requires a kernel with a recent enough io_uring support, at least recent enough to run discovery probes. The minimum version at this time is 5.8

For more details check out our docs page and an introductory article

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.