forked from unom/punktfunk
enricobuehlerandClaude Fable 5
48511d1267
The capacity probe divided client-side bytes by the HOST's burst duration — a window wrong on both edges (base snapshotted before the burst reached the host, frozen only when the ProbeResult landed, while the host's clock stops the moment ITS send window closes, before the switch/kernel queue finishes draining toward the client). On a 1 GbE link a 2 Gbps burst target "measured" 1266 Mbps and set an 886 Mbps climb ceiling the link could never carry — permanent for the session, because set_ceiling never lowers. The reassembler now stamps probe-scoped counters (bytes, packets, first/last arrival, monotonic ns) at its FLAG_PROBE routing, so video around the burst contaminates neither numerator nor denominator; the throughput divisor is the client's first→last arrival interval, with the host duration kept as the fallback when fewer than two probe packets arrived. The user-facing speed test shares the corrected computation (ProbeOutcome/PunktfunkProbeResult layouts unchanged; elapsed_ms docs updated to the new semantics). Two guards ride along: - PUNKTFUNK_ABR_MAX_MBPS clamps inside set_ceiling — the one funnel every learned ceiling passes through — so a user cap binds no matter what any probe concludes. - The controller latches decode_cap_kbps when two CONSECUTIVE backoffs carry decode-severe evidence (deep decode excursion or jump-to-live flush) at a similar pre-backoff rate, mirroring host_cap_kbps for the client decoder: a knee below the link ceiling was a permanent 30-60 s sawtooth costing a flush + dropped-frame burst per cycle (1440p120 HEVC field case, knee ~490 Mbps). One spurious flush never latches; the cap re-probes on the CAP_REPROBE_WINDOWS clock, so it lifts when the decoder recovers. Also rights the three stale "3 Gbps" probe-clamp comments (the host constant has been 10 Gbps since MAX_PROBE_KBPS moved). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>