Three bugs found running the owed throughput sweeps (all three conspired
to make yesterday's 'transport does 1G+' numbers fabrications):
- the probe never advertised VIDEO_CAP_PROBE_SEQ, so every host DECLINED
its speed tests; the zeroed decline reply divided a settle-window
sliver by 1 ms and printed plausible-looking garbage. Advertise the
cap (the shared-core reassembler windows probe-space frames) and
detect the all-zero decline explicitly.
- an idle virtual desktop publishes no frames on damage-driven capture
(Windows IDD-push), so the pipeline build timed out before the burst
could run. The probe now injects a ±2 px cursor wiggle over the wire
during --speed-test warmup — injected host-side into the right
session, works headless everywhere.
- throughput-sweep.py: tracing emits ANSI color into pipes, which broke
the key=value parser (crash on the first point); strip it, guard
half-parsed lines, and surface host declines as a flag.
Also logs the whole-run receive stage split (PUNKTFUNK_PERF) at stream
end — the probe is the measurement tool for the client-pump wall.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Standalone sweep to probe the ~500 Mbps throughput wall (transport vs encoder
CBR undershoot); built and validated, no runtime coupling.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler