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

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

Status

Glommio is still considered an alpha release. The main reasons are:

• The existing API is still evolving
• There are still some uses of unsafe that can be avoided
• There are features that are critical for a good thread per core system that are not implemented yet. The top one being:
  • per-shard memory allocator.

Want to help bring us to production status sooner? PRs are welcome!

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.