[C#] Add shrike-minima - epoll, SPSC recv ring (Minima model)#835
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[C#] Add shrike-minima - epoll, SPSC recv ring (Minima model)#835MDA2AV wants to merge 1 commit into
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A C# epoll engine with an IVTS-backed, RCA=true async handler, fixed the Minima way: an SPSC recv ring decouples the worker from the handler. The worker recv's into pooled buffers and enqueues (ptr, len) on a per-connection single-producer / single-consumer ring; the handler resumes on the thread pool, dequeues the chunks into its own parse buffer, and returns the buffers. Worker and handler never share a buffer (no driver/handler race), and recv pipelines with parse. The epoll analogue of Minima's SpscRecvRing. Sibling of shrike-tokio (#832), which fixes the same race the Tokio way (the handler does its own recv). Serves baseline, pipelined, limited-conn; hand-rolled HTTP/1.1; Connection: close sends a FIN. Validated 14/14 (every TCP-fragmentation case), 0/100 fragmented POST, 8000 keep-alive with zero drops.
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Description
shrike-minima — a C# epoll engine with an IVTS-backed, RCA=true async handler, fixed the Minima way: an SPSC recv ring decouples the worker from the handler.
engine-tier;baseline/pipelined/limited-conn.The model (no driver/handler race)
(ptr, len)on a per-connection single-producer / single-consumer ring (SpscRing), then signals.Worker and handler touch disjoint ends of the ring (release/acquire) and each recv buffer is owned by one side at a time → the recv buffer is never shared. Unlike the Tokio-style sibling, recv pipelines with parse (the worker keeps pumping while the handler works); the cost is one extra copy (chunk → parse buffer) + the pool/ring bookkeeping. It's the epoll analogue of Minima's
SpscRecvRing.Siblings (same race, two fixes)
recv(Tokio/mio model). No copy, but recv can't overlap parse.Verification
validate.sh14/14 (every TCP-fragmentation case), 0/100 fragmented POST, 8000 keep-alive with 0 drops.