Arm streaming-perf-stats capture from the web console, play, stop, and review the
run as graphs; finished captures are saved to disk as browsable/exportable
recordings. Covers both the native punktfunk/1 path and GameStream.
- stats_recorder.rs: one shared Arc<StatsRecorder> ring (created in gamestream::serve,
shared with the mgmt API + both streaming loops, mirroring NativePairing). The
hot-path gate is a runtime AtomicBool that replaces the startup-only PUNKTFUNK_PERF
for *recording* (PERF stdout logging unchanged); bounded ring (~3 h); atomic
temp+rename writes to ~/.config/punktfunk/captures/*.json; path-traversal-safe ids;
poison-resilient locks.
- native (punktfunk1.rs) + GameStream (stream.rs) emit a StatsSample at their existing
~2 s / ~1 s aggregation boundary — per-stage latency p50/p99, fps new/repeat, goodput,
loss/FEC deltas — with no new per-frame work beyond the cheap atomic check.
FrameMsg.was_measured keeps pre-arm in-flight frames out of the first window's
percentiles (without zeroing the Windows-relay path's fps/encode).
- mgmt.rs: 7 bearer-only /api/v1/stats/* endpoints (capture start/stop/status/live;
recordings list/get/delete); api/openapi.json regenerated, in sync.
- web: new "Performance" page (recharts, rendered SSR-safe) — capture control, live
graphs while armed, recordings table (view / download-JSON / delete), and a detail
view with the latency stacked-area bottleneck breakdown (p50/p99 toggle) + throughput
+ health. Charts adapt to either path's stage set.
Design: design/stats-capture-plan.md. Built and adversarially reviewed via a multi-agent
workflow; workspace build/clippy(-D warnings)/fmt/tests green, OpenAPI no-drift. Not yet
on-glass validated against a live session.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
da3f37317b