perf(shard): lock-free cross-shard read recovery — idle+batch-gated reply spin + dead-flag cleanup#177

Merged

pilotspacex-byte merged 16 commits into

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feat/xshard-read-fastpath

Jun 15, 2026

Commits on Jun 14, 2026

docs(add): freeze xshard-read-fastpath §3 contract @ v1
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test(xshard-read-fastpath): §4 red suite — idle-gate API pin + cleanup shape
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feat(shard): idle-gated cross-shard reply-side spin + drop dead fast-path surface
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docs(add): advance xshard-read-fastpath to phase=build
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refactor(server): consolidate ResponseSlot unsafe take + fmt the C2 increment
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test(bench): generalize xshard baseline harness to an N-commit same-run list
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fix(test): purge cross_shard_fast_path refs after C4 deletion + drop dead bench script
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fix(shard): gate cross-shard reply spin on singleton batch (kill s4-P16 -27%)
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test(bench): add 3-way xshard batch-gate fix re-measure harness
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docs(add): record xshard-read-fastpath VERIFY — P16 regression caught + fixed, gate PASS-pending
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docs(add): close xshard-read-fastpath (gate PASS) + tick v2 exit criterion
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style(server): wrap batch_remote_total binding to satisfy rustfmt
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