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Devmem TCP #23

Closed jkalwas closed 2 weeks ago

jkalwas commented 3 weeks ago

Devmem TCP is a feature developed by Google and already deployed in their production, based on their own and Meta patches, with a strong driving force to merge into the Linux kernel by the end of 2024. SPDK could leverage this approach to achieve zero-copy TCP receive flows.

Blog post https://www.linkedin.com/pulse/devmem-tcp-back-future-rakesh-cheerla-buplc Slides: https://netdevconf.info/0x17/sessions/talk/device-memory-tcp.html Devmem TCP https://netdevconf.info/0x17/docs/netdev-0x17-paper24-talk-slides/Zero%20Copy%20Rx%20with%20io_uring%20-%20NetDev%20Conf%202023-1.pdf Zero copy network RX using io_uring Patches: https://patchwork.kernel.org/project/linux-media/list/?series=861412&state=%2A&archive=both Device memory TCP kernel patch series https://patchwork.kernel.org/project/io-uring/list/?series=834772&state=%2A&archive=both Zero copy Rx using io_uring kernel patch series https://github.com/spikeh/linux/tree/zcrx/next Devmem TCP + Zero copy https://github.com/spikeh/liburing/tree/zcrx/next liburing https://github.com/spikeh/netbench/tree/zcrx/next Benchmarking tool

Same topic SPDK patch series: https://review.spdk.io/gerrit/c/spdk/spdk/+/17597/28

tomzawadzki commented 2 weeks ago

[60min]

jimharris commented 2 weeks ago

Need to track work on this. No immediate takeaways.