steam-frame/saphid--frame-control
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saphid--frame-control/bench/results/2026-09-28-a3c6e5c-dirty-ab-adapt-clean.json
T
saphidandClaude Opus 5.5 9e4dcdd147 Mac in the headset: measure every frame, adapt to the network, separate windows 
- Per-frame timing on the Mac's clock (capture, encode, network, decode,
  draw), viewer clock sync and reports, input echo, /stats and a HUD.
- scripts/macview-bench.py: repeatable runs on the real Frame, a shaping
  relay (no sudo), interleaved A/B between agent settings; results in
  bench/results/.
- Adaptive controller: ack-based send gate with jitter-aware slack, AIMD
  bitrate that knows when a stream is app-limited, fps then size tiers.
  On a 50->3->50 Mbit/s step, scroll p95 went from 4.7 s to 72 ms; no cost
  on a clean link.
- Separate mode: real AppKit event loop (HiDPI and NSScreen now work),
  cropped capture for fixed-size windows, windows kept on their display,
  graceful quit restores windows; stop/start races fixed.
- Encoder timeline clamp (no oversized frame after a pause).
- Frame Control shows each live stream's fps, delay, bitrate and tier.

Reviewed by GPT-6 Astra xhigh (read-only), 7 rounds; findings fixed.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-09-28 20:56:14 +10:00

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{
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"date": "2026-09-28T17:50:22",
"commit": "a3c6e5c+dirty",
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"src": "test"
},
{
"scenario": "scroll",
"frames_sent": 604,
"frames_drawn": 604,
"frames_shown": 496,
"duration_s": 15.8,
"stages_ms": {
"capture": {
"p50": -3.6,
"p95": 11.2,
"p99": 19.8,
"n": 604
},
"queue": {
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"p95": 15.4,
"p99": 23.5,
"n": 604
},
"encode": {
"p50": 6.8,
"p95": 9.3,
"p99": 19.2,
"n": 604
},
"socket": {
"p50": 0.1,
"p95": 0.2,
"p99": 0.7,
"n": 604
},
"network": {
"p50": 7.9,
"p95": 76.6,
"p99": 94.2,
"n": 604
},
"decode": {
"p50": 6.3,
"p95": 19.1,
"p99": 25.5,
"n": 604
},
"draw": {
"p50": 0.6,
"p95": 1.0,
"p99": 1.6,
"n": 604
},
"present": {
"p50": 0.9,
"p95": 19.0,
"p99": 22.0,
"n": 496
},
"content": {
"p50": 23.4,
"p95": 100.3,
"p99": 145.3,
"n": 604
},
"content_shown": {
"p50": 28.9,
"p95": 104.7,
"p99": 158.2,
"n": 496
}
},
"fps": 38.2,
"fps_shown": 31.3,
"late_pct": 25.87,
"stall_max": 180.7,
"stalls_over_100ms": 22,
"mbps": 6.88,
"keyframes": 1,
"size": "1920x1290",
"captured": 843,
"viewer_never_drawn": 0,
"input_ms": {
"n": 0
},
"input_shown_ms": {
"n": 0
},
"input_parts_ms": {
"uplink": {
"n": 0
},
"mac": {
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},
"back": {
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}
},
"inputs": {
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},
"timeline": [
{
"t": 0,
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"mbps": 6.12,
"content_p50": 30.5,
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"tier": 0,
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"net": null
},
{
"t": 1,
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"content_p50": 36.9,
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"bitrate": 8223440,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 2,
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"mbps": 8.28,
"content_p50": 20.3,
"content_p95": 62.3,
"bitrate": 11110898,
"tier": 0,
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"net": null
},
{
"t": 3,
"fps": 42,
"mbps": 9.01,
"content_p50": 22.2,
"content_p95": 91.7,
"bitrate": 14860800,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 4,
"fps": 47,
"mbps": 8.61,
"content_p50": 15.8,
"content_p95": 81.3,
"bitrate": 14860800,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 5,
"fps": 43,
"mbps": 8.02,
"content_p50": 17.4,
"content_p95": 56.5,
"bitrate": 14860800,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 6,
"fps": 40,
"mbps": 7.97,
"content_p50": 29.0,
"content_p95": 82.4,
"bitrate": 14860800,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 7,
"fps": 36,
"mbps": 7.83,
"content_p50": 33.3,
"content_p95": 100.5,
"bitrate": 6992996,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 8,
"fps": 40,
"mbps": 5.6,
"content_p50": 21.7,
"content_p95": 97.9,
"bitrate": 7742295,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 9,
"fps": 43,
"mbps": 7.07,
"content_p50": 19.5,
"content_p95": 90.7,
"bitrate": 10470493,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 10,
"fps": 44,
"mbps": 7.09,
"content_p50": 19.9,
"content_p95": 97.5,
"bitrate": 7246454,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 11,
"fps": 35,
"mbps": 5.19,
"content_p50": 22.4,
"content_p95": 166.6,
"bitrate": 5307220,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 12,
"fps": 39,
"mbps": 4.5,
"content_p50": 22.9,
"content_p95": 84.3,
"bitrate": 5887942,
"tier": 1,
"w": 1920,
"net": null
},
{
"t": 13,
"fps": 36,
"mbps": 5.81,
"content_p50": 28.4,
"content_p95": 94.8,
"bitrate": 8002349,
"tier": 1,
"w": 1920,
"net": null
},
{
"t": 14,
"fps": 36,
"mbps": 7.68,
"content_p50": 27.4,
"content_p95": 107.5,
"bitrate": 11948287,
"tier": 1,
"w": 1920,
"net": null
},
{
"t": 15,
"fps": 30,
"mbps": 5.87,
"content_p50": 33.0,
"content_p95": 104.9,
"bitrate": 14562426,
"tier": 1,
"w": 1920,
"net": null
}
],
"adapt": [],
"content_p50": 23.4,
"content_p95": 100.3,
"input_p50": null,
"input_p95": null,
"grades": {
"content_p50": "local",
"content_p95": "bad",
"fps": "bad",
"late_pct": "bad",
"stall_max": "acceptable"
},
"controller": {
"adapt": true,
"baseRtt": 6.959,
"ceiling": 14860800,
"fps": 60,
"inFlight": 2,
"scale": 1,
"target": 7430400,
"tier": 0
},
"events": [
{
"t": 0.87,
"e": "down to 7430 kbit/s: queue 191 ms, held 3, oldest 218 ms, base 7 ms, sent 4207 got 3329"
},
{
"t": 7.54,
"e": "down to 8741 kbit/s: queue 52 ms, held 3, oldest 35 ms, base 7 ms, sent 10505 got 9712"
},
{
"t": 7.84,
"e": "down to 6992 kbit/s: queue 17 ms, held 3, oldest 3 ms, base 7 ms, sent 8895 got 9452"
},
{
"t": 10.54,
"e": "down to 7246 kbit/s: queue 19 ms, held 3, oldest 80 ms, base 7 ms, sent 8009 got 8051"
},
{
"t": 11.74,
"e": "down to 5307 kbit/s: queue 26 ms, held 3, oldest 9 ms, base 6 ms, sent 5808 got 5896"
},
{
"t": 12.34,
"e": "tier 1"
},
{
"t": 16.14,
"e": "tier 0"
},
{
"t": 17.34,
"e": "down to 7430 kbit/s: queue 94 ms, held 2, oldest 94 ms, base 6 ms, sent 7608 got 6892"
}
],
"source_fps": 53.4,
"cpu": {
"mac_agent_pct": 6.5,
"frame_viewer_pct": 69.3,
"frame_tailscaled_pct": 6.4,
"frame_sshd_pct": 0.6,
"frame_gamescope_pct": 23.2,
"frame_total_pct": 27.8
},
"viewer": "h264 software; ANGLE (Mesa, zink Vulkan 1.4(Turnip Adreno (TM) 750 (MESA_TURNIP)), OpenGL 4.6); raf 139 Hz",
"show_s": 1.35,
"panel": "valve.steam.desktopgame.2001652781",
"src": "separate:13306"
}
],
[
{
"scenario": "test",
"frames_sent": 482,
"frames_drawn": 482,
"frames_shown": 479,
"duration_s": 15.7,
"stages_ms": {
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"p95": 0.0,
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},
"queue": {
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"p99": 18.6,
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},
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"p99": 5.0,
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},
"socket": {
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"p95": 0.2,
"p99": 0.2,
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},
"network": {
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"p95": 36.8,
"p99": 84.9,
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},
"decode": {
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"p95": 2.7,
"p99": 4.8,
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},
"draw": {
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"p99": 0.9,
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},
"present": {
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},
"content": {
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"p95": 54.1,
"p99": 104.8,
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},
"content_shown": {
"p50": 24.9,
"p95": 54.9,
"p99": 77.6,
"n": 479
}
},
"fps": 30.6,
"fps_shown": 30.4,
"late_pct": 68.81,
"stall_max": 218.0,
"stalls_over_100ms": 10,
"mbps": 0.19,
"keyframes": 2,
"size": "960x540",
"captured": 1037,
"viewer_never_drawn": 0,
"input_ms": {
"p50": 53.9,
"p95": 117.8,
"p99": 222.5,
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},
"input_shown_ms": {
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},
"input_parts_ms": {
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},
"mac": {
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"p95": 30.4,
"p99": 63.3,
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},
"back": {
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"p95": 38.3,
"p99": 38.6,
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}
},
"inputs": {
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},
"timeline": [
{
"t": 0,
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"mbps": 0.46,
"content_p50": 9.9,
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"tier": 0,
"w": 1280,
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},
{
"t": 1,
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},
{
"t": 2,
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"mbps": 0.28,
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},
{
"t": 3,
"fps": 25,
"mbps": 0.23,
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},
{
"t": 4,
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},
{
"t": 5,
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"mbps": 0.1,
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"content_p95": 96.2,
"bitrate": 300000,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 6,
"fps": 31,
"mbps": 0.12,
"content_p50": 29.6,
"content_p95": 46.7,
"bitrate": 300000,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 7,
"fps": 30,
"mbps": 0.12,
"content_p50": 25.7,
"content_p95": 80.1,
"bitrate": 380000,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 8,
"fps": 32,
"mbps": 0.2,
"content_p50": 29.0,
"content_p95": 56.4,
"bitrate": 671280,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 9,
"fps": 26,
"mbps": 0.13,
"content_p50": 31.8,
"content_p95": 47.8,
"bitrate": 458624,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 10,
"fps": 30,
"mbps": 0.14,
"content_p50": 36.1,
"content_p95": 64.2,
"bitrate": 458624,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 11,
"fps": 29,
"mbps": 0.14,
"content_p50": 28.1,
"content_p95": 56.7,
"bitrate": 458624,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 12,
"fps": 26,
"mbps": 0.11,
"content_p50": 18.7,
"content_p95": 27.8,
"bitrate": 300000,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 13,
"fps": 32,
"mbps": 0.24,
"content_p50": 20.1,
"content_p95": 24.8,
"bitrate": 468000,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 14,
"fps": 32,
"mbps": 0.18,
"content_p50": 19.4,
"content_p95": 32.8,
"bitrate": 468000,
"tier": 4,
"w": 960,
"net": null
},
{
"t": 15,
"fps": 24,
"mbps": 0.12,
"content_p50": 21.9,
"content_p95": 35.2,
"bitrate": 671280,
"tier": 4,
"w": 960,
"net": null
}
],
"adapt": [],
"content_p50": 22.9,
"content_p95": 54.1,
"input_p50": 53.9,
"input_p95": 117.8,
"grades": {
"content_p50": "local",
"content_p95": "acceptable",
"input_p50": "acceptable",
"input_p95": "acceptable",
"fps": "bad",
"late_pct": "bad",
"stall_max": "acceptable"
},
"controller": {
"adapt": true,
"baseRtt": 6.417,
"ceiling": 5529600,
"fps": 30,
"inFlight": 2,
"scale": 0.5,
"target": 1386355,
"tier": 4
},
"events": [
{
"t": 0.87,
"e": "down to 1545 kbit/s: queue 18 ms, held 3, oldest 11 ms, base 5 ms, sent 424 got 420"
},
{
"t": 1.27,
"e": "down to 772 kbit/s: queue 40 ms, held 3, oldest 55 ms, base 5 ms, sent 374 got 368"
},
{
"t": 1.48,
"e": "tier 3"
},
{
"t": 3.37,
"e": "down to 386 kbit/s: queue 119 ms, held 5, oldest 20 ms, base 5 ms, sent 210 got 208"
},
{
"t": 3.88,
"e": "tier 4"
},
{
"t": 4.07,
"e": "down to 300 kbit/s: queue 55 ms, held 0, oldest 0 ms, base 5 ms, sent 254 got 254"
},
{
"t": 4.97,
"e": "down to 300 kbit/s: queue 113 ms, held 1, oldest 91 ms, base 5 ms, sent 154 got 161"
},
{
"t": 9.78,
"e": "down to 458 kbit/s: queue 206 ms, held 6, oldest 0 ms, base 6 ms, sent 109 got 127"
},
{
"t": 12.17,
"e": "down to 300 kbit/s: queue 4 ms, held 6, oldest 215 ms, base 6 ms, sent 116 got 103"
}
],
"source_fps": 66.1,
"cpu": {
"mac_agent_pct": 10.9,
"frame_viewer_pct": 42.3,
"frame_tailscaled_pct": 3.8,
"frame_sshd_pct": 0.4,
"frame_gamescope_pct": 15.4,
"frame_total_pct": 23.3
},
"viewer": "h264 software; ANGLE (Mesa, zink Vulkan 1.4(Turnip Adreno (TM) 750 (MESA_TURNIP)), OpenGL 4.6); raf 70 Hz",
"show_s": 1.46,
"panel": "valve.steam.desktopgame.2001639889",
"src": "test"
},
{
"scenario": "scroll",
"frames_sent": 523,
"frames_drawn": 523,
"frames_shown": 515,
"duration_s": 15.7,
"stages_ms": {
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"p95": 10.3,
"p99": 17.5,
"n": 523
},
"queue": {
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"p95": 18.2,
"p99": 33.6,
"n": 523
},
"encode": {
"p50": 6.8,
"p95": 8.4,
"p99": 17.2,
"n": 523
},
"socket": {
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"p95": 0.2,
"p99": 0.4,
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},
"network": {
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"p95": 34.2,
"p99": 205.8,
"n": 523
},
"decode": {
"p50": 6.2,
"p95": 15.1,
"p99": 23.5,
"n": 523
},
"draw": {
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"p95": 0.8,
"p99": 1.7,
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},
"present": {
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"p95": 11.4,
"p99": 14.3,
"n": 515
},
"content": {
"p50": 23.9,
"p95": 65.6,
"p99": 214.3,
"n": 523
},
"content_shown": {
"p50": 26.4,
"p95": 66.0,
"p99": 215.2,
"n": 515
}
},
"fps": 33.3,
"fps_shown": 32.7,
"late_pct": 56.13,
"stall_max": 321.6,
"stalls_over_100ms": 10,
"mbps": 6.29,
"keyframes": 2,
"size": "1920x1290",
"captured": 789,
"viewer_never_drawn": 0,
"input_ms": {
"n": 0
},
"input_shown_ms": {
"n": 0
},
"input_parts_ms": {
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"n": 0
},
"mac": {
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},
"back": {
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}
},
"inputs": {
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},
"timeline": [
{
"t": 0,
"fps": 29,
"mbps": 6.01,
"content_p50": 17.9,
"content_p95": 139.0,
"bitrate": 7430400,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 1,
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"mbps": 2.1,
"content_p50": 33.3,
"content_p95": 86.5,
"bitrate": 2202984,
"tier": 3,
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"net": null
},
{
"t": 2,
"fps": 30,
"mbps": 2.11,
"content_p50": 23.4,
"content_p95": 40.3,
"bitrate": 2770610,
"tier": 3,
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"net": null
},
{
"t": 3,
"fps": 30,
"mbps": 3.24,
"content_p50": 19.3,
"content_p95": 47.2,
"bitrate": 3853181,
"tier": 3,
"w": 1440,
"net": null
},
{
"t": 4,
"fps": 26,
"mbps": 3.85,
"content_p50": 20.9,
"content_p95": 120.6,
"bitrate": 5294082,
"tier": 3,
"w": 1440,
"net": null
},
{
"t": 5,
"fps": 26,
"mbps": 2.95,
"content_p50": 23.3,
"content_p95": 46.7,
"bitrate": 3187180,
"tier": 2,
"w": 1920,
"net": null
},
{
"t": 6,
"fps": 29,
"mbps": 3.51,
"content_p50": 27.5,
"content_p95": 48.7,
"bitrate": 4898398,
"tier": 2,
"w": 1920,
"net": null
},
{
"t": 7,
"fps": 28,
"mbps": 5.29,
"content_p50": 28.2,
"content_p95": 48.8,
"bitrate": 6685266,
"tier": 2,
"w": 1920,
"net": null
},
{
"t": 8,
"fps": 29,
"mbps": 7.09,
"content_p50": 23.8,
"content_p95": 50.0,
"bitrate": 9063588,
"tier": 2,
"w": 1920,
"net": null
},
{
"t": 9,
"fps": 35,
"mbps": 9.72,
"content_p50": 31.0,
"content_p95": 59.7,
"bitrate": 13502047,
"tier": 1,
"w": 1920,
"net": null
},
{
"t": 10,
"fps": 42,
"mbps": 12.62,
"content_p50": 23.9,
"content_p95": 34.4,
"bitrate": 14860800,
"tier": 1,
"w": 1920,
"net": null
},
{
"t": 11,
"fps": 47,
"mbps": 11.31,
"content_p50": 20.5,
"content_p95": 41.9,
"bitrate": 14860800,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 12,
"fps": 35,
"mbps": 8.1,
"content_p50": 20.7,
"content_p95": 120.2,
"bitrate": 14860800,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 13,
"fps": 35,
"mbps": 6.11,
"content_p50": 21.1,
"content_p95": 36.8,
"bitrate": 7430400,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 14,
"fps": 42,
"mbps": 8.02,
"content_p50": 24.8,
"content_p95": 38.7,
"bitrate": 10055362,
"tier": 0,
"w": 1920,
"net": null
},
{
"t": 15,
"fps": 34,
"mbps": 6.95,
"content_p50": 19.2,
"content_p95": 309.3,
"bitrate": 12271987,
"tier": 0,
"w": 1920,
"net": null
}
],
"adapt": [],
"content_p50": 23.9,
"content_p95": 65.6,
"input_p50": null,
"input_p95": null,
"grades": {
"content_p50": "local",
"content_p95": "acceptable",
"fps": "bad",
"late_pct": "bad",
"stall_max": "bad"
},
"controller": {
"adapt": true,
"baseRtt": 7.209,
"ceiling": 14860800,
"fps": 60,
"inFlight": 1,
"scale": 1,
"target": 7502051,
"tier": 0
},
"events": [
{
"t": 0.78,
"e": "down to 7430 kbit/s: queue 95 ms, held 3, oldest 0 ms, base 7 ms, sent 4459 got 5191"
},
{
"t": 1.08,
"e": "down to 3715 kbit/s: queue 130 ms, held 2, oldest 127 ms, base 7 ms, sent 2434 got 2754"
},
{
"t": 1.48,
"e": "down to 2202 kbit/s: queue 44 ms, held 1, oldest 37 ms, base 7 ms, sent 1917 got 2447"
},
{
"t": 1.68,
"e": "tier 3"
},
{
"t": 4.98,
"e": "down to 3187 kbit/s: queue 102 ms, held 0, oldest 31 ms, base 7 ms, sent 3802 got 3541"
},
{
"t": 5.18,
"e": "tier 2"
},
{
"t": 9.38,
"e": "tier 1"
},
{
"t": 11.48,
"e": "tier 0"
},
{
"t": 13.28,
"e": "down to 7430 kbit/s: queue 257 ms, held 5, oldest 240 ms, base 6 ms, sent 4758 got 6534"
},
{
"t": 15.99,
"e": "down to 6774 kbit/s: queue 1 ms, held 6, oldest 284 ms, base 7 ms, sent 5665 got 4867"
}
],
"source_fps": 50.3,
"cpu": {
"mac_agent_pct": 5.8,
"frame_viewer_pct": 64.7,
"frame_tailscaled_pct": 5.9,
"frame_sshd_pct": 0.6,
"frame_gamescope_pct": 16.2,
"frame_total_pct": 26.5
},
"viewer": "h264 software; ANGLE (Mesa, zink Vulkan 1.4(Turnip Adreno (TM) 750 (MESA_TURNIP)), OpenGL 4.6); raf 71 Hz",
"show_s": 1.37,
"panel": "valve.steam.desktopgame.2001605080",
"src": "separate:13687"
}
]
]
},
"table": {
"test": {
"content_p50": {
"off": [
11.5,
10.5,
12.2
],
"on": [
10.9,
10.5,
22.9
]
},
"content_p95": {
"off": [
15.8,
52.3,
29.7
],
"on": [
75.0,
15.4,
54.1
]
},
"input_p50": {
"off": [
28.8,
26.7,
31.4
],
"on": [
27.2,
24.6,
53.9
]
},
"input_p95": {
"off": [
38.1,
89.3,
78.1
],
"on": [
95.5,
39.8,
117.8
]
},
"fps": {
"off": [
60.1,
60.1,
60.1
],
"on": [
53.6,
59.4,
30.6
]
},
"late_pct": {
"off": [
0.95,
3.61,
5.73
],
"on": [
6.06,
0.75,
68.81
]
},
"stall_max": {
"off": [
68.8,
120.1,
123.4
],
"on": [
127.2,
126.0,
218.0
]
},
"mbps": {
"off": [
0.48,
0.47,
0.48
],
"on": [
0.43,
0.48,
0.19
]
}
},
"scroll": {
"content_p50": {
"off": [
19.5,
33.3,
25.3
],
"on": [
16.6,
23.4,
23.9
]
},
"content_p95": {
"off": [
44.4,
108.6,
110.6
],
"on": [
45.7,
100.3,
65.6
]
},
"input_p50": {
"off": [],
"on": []
},
"input_p95": {
"off": [],
"on": []
},
"fps": {
"off": [
47.1,
52.6,
39.5
],
"on": [
48.4,
38.2,
33.3
]
},
"late_pct": {
"off": [
20.92,
14.84,
33.66
],
"on": [
21.06,
25.87,
56.13
]
},
"stall_max": {
"off": [
128.0,
232.0,
362.0
],
"on": [
88.2,
180.7,
321.6
]
},
"mbps": {
"off": [
9.15,
9.35,
8.59
],
"on": [
9.16,
6.88,
6.29
]
}
}
}
}
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