docs(design): per-file vs shared io_uring ring bench plan (#1410)#3882
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Adds a documentation-only design note quantifying the cost of the current per-file io_uring topology against a session-level shared ring on a 100K small-file flood, with a 30% p99 tail-latency reduction pass/fail bar.
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Summary
docs/design/io-uring-shared-ring-bench.md(118 lines) covering issue Add xtask branding command and correct CI CLI test target #1410.crates/fast_io/src/io_uring/), the session-level shared-ring + tag-based completion design, the 100K x 4 KB bench harness plan, the Linux setup (cgroup memory cap, CPU pin, kernel >= 6.1), and the 30% p99 tail-latency reduction pass/fail bar.docs/design/iouring-session-ring-pool.md(Add xtask docs command for documentation validation #1408 / Document oc release branding and enforce README validation #1409) anddocs/design/io-uring-submission-modes-bench-plan.md(Fix platform lookup usage in CLI #1626).Test plan
crates/fast_io/src/io_uring/resolve on master.