io_uring support

[Jonas-Heinrich]

Feature Request: io_uring support

I am not sure whether this has been asked before (could not find it via search), but has an optimized networking stack using Linux's io_uring kernel interface been considered? E.g., based on the analysis in the paper of Durner et al. [1], I would expect up to 30% reduction in CPU usage:

Use Case

Looking at an internal benchmark, we noticed that a non-trivial amount of CPU usage occurs when we just download data from S3. Besides decryption, this workload also copies a lot of data between kernel and user space (which could be reduced with io_uring).

Additionally, AWS requests could be batched to invoke only a single syscall.

Proposed Solution

Reference implementation (C++): https://github.com/durner/AnyBlob

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

A note for the community

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[1] Durner, D., Leis, V. and Neumann, T., 2023. Exploiting Cloud Object Storage for High-Performance Analytics. Proceedings of the VLDB Endowment, 16(11), pp.2769-2782.Looking at e.g. this paper's figure 12

[rcoh]

This work would be in the underlying IO libraries (Tokio, Hyper, etc.) and not in the SDK itself. I agree this is an interesting direction though!

[Velfi]

I'm going to close this since we won't be implementing it ourselves. If you find a Rust client that makes use of this optimization and have trouble getting it to work with the SDK, let us know.

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