linux AIO support

[spacejam]

Just read https://www.usenix.org/system/files/fast19-kourtis.pdf and it makes a really compelling case for the combination of stackful coroutines + proper linux AIO (and eventually SPDK support). This is a combination I could actually imagine myself using in sled, where I'm now trying to scale toward a many-core architecture, but don't want to pay the various ergonomic costs associated with the popular async stuff in the rust ecosystem right now.

https://github.com/hmwill/tokio-linux-aio may be a nice reference for building linux AIO support for May.

Would you be interested in having AIO support in May directly, or do you see this as something better implemented in a separate library? Very curious about this :)

[Xudong-Huang]

Oh, I think it somehow like windows IOCP. I think we can uniform the interface for may::fs::File (compatible with std::fs::File) for all platforms. Linux by AIO and event_fd, windows by IOCP, BSD by kqueue and aio_read. However I have no clue about FreeBSD now.

[Xudong-Huang]

The linux aio is not yet perfect right now, especially we need to have a io manager for the direct access memory. And there are other solutions pushing forward like io_uring which seems have better performance.

windows IOCP implementation is quite easy for the requirement and it's done.

[spacejam]

Yeah, for sled I'm thinking about skipping AIO support initially and just targeting io_uring for the time being since it's so much nicer to work with and also so much more performant

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On Fri, Apr 19, 2019, 04:58 Xudong Huang ***@***.***> wrote: The linux aio is not yet perfect right now, especially we need to have a io manager for the direct access memory. And there are other solutions pushing forward like io_uring which seems have better performance. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#52 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AALPRUEOP7HMWTCNMQMNHUTPREYNZANCNFSM4G22W3LQ> .

[luover]

I don't know if it helps. this id a library here rust-io-uring