host hp · current shared-epoch experiment

Target throughput · OPEN v4

50,000 requests/s across the whole cell: 50,000/session/s for single, or exactly 1,562.5/session/s at 32 sessions. All clients share a prepared phase epoch; cell-wide slots are 20 µs apart. Delayed sends retain their intended slots.

workload timed since 2026-09-12: 30 s measured + 5 s warmup × 3 runs, each session offered its exact share of the cell rate — 1,500,000 measured messages per run at any session count. Cells measured earlier are 20,000 warmup + 20,000 measured/session × 3 runs; every cell shows the window it measured. units µs · worst reported percentile/max across sessions

Current 6254 tuned matrix. All 84 supported cells were captured 2026-09-19 under one pinned GCC 14 profile and complete v4 recipe provenance. See the collection record.

Applies to this OPEN v4 target-throughput matrix. Every measured cell shows p50, p99, p99.9 and max for the selected latency. Service is actual client start to completed reply; response starts at the scheduled slot and includes scheduler delay. Missing values show —. All four acceptor models stay visible; highlighting compares the selected metric among visible, qualified results.

Maximum throughput

not measured Highest sustained completed request/reply rate across the whole cell, established by an open-load rate sweep. Report the passing/failing rate bracket and response latency at the passing rate. This measures the configured client/server system, not an isolated engine limit.

No validated maximum-throughput sweep is available yet. The historical closed-loop test allows only one outstanding request per session and is not maximum throughput. Existing target-rate observations are not maximum-throughput results either. Candidate-run instructions and remaining validation work.

Earlier experiments

Historical RTT, reply-gated pacing and aligned-deadline OPEN v3 remain on the separate earlier matrix.

Core placement

scenarioserver coresclient cores
1 · single914
2 · mono910-12,14-17
3 · pool9-1214-17
4 · shard9-1214-17

isolated: 8-17 · VMA maintenance (reserved, no app threads): 13 · housekeeping (never measured on): 0-7 · Pool coordinator (separate from workers): 8