kwin_overlay_subsurface:metrics
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Table of Contents
metrics.csv — locked Phase 1 cells
Locked binding cells for the campaign. Raw CSV attachment: metrics.csv.
Inherits the success-criteria shape from ohm_gl_fix Phase 1r (drops_post_warmup, drops sanity cap) plus a new cell kwin_wayland_cpu_steady_state that locks the intent that the fix must move work, not hide it.
Schema
- phase —
phase0_handover|phase1_baseline_kwin|phase1_reference_cage|phase1_goal_target|phase1_goal_actual|phase3_perf_kwin|phase3_perf_cage - path_label — descriptive playback configuration
- clip — source media file (sha16:
dcf8a7170fbd49bbforbbb_1080p30_h264.mp4) - compositor —
kwin|cage_nested|cage_drm - surface_protocol —
zwp_linux_dmabuf_v1_subsurface|single_fullscreen_surface|direct_drm_scanout - drops — total dropped frames over window_s
- frames_total — total frames considered (delivered + dropped)
- drop_pct —
100 * drops / frames_total - window_s — full measurement window
- warmup_s — duration tolerated as warmup
- drops_post_warmup — drops in (warmup_s, window_s] — binding for C1
- effective_fps — delivered frames per second
- kwin_wayland_cpu — steady-state %CPU of kwin_wayland during t > 30 s
- route_engaged — Y/N — wp_subsurface protocol still in use (binding for C4)
- role —
metric= success criterion;reference= control floor;metric_actual= measured-against-locked-metric;handover= imported context, not own measurement - source — where this row's number came from
- date — ISO date the number was taken
Phase 1 success criteria (locked 2026-05-02)
- C1:
drops_post_warmup == 0over 60 s (warmup_s = 10) - C2:
drops_total ⇐ 10over 70 s (sanity cap) - C3:
kwin_wayland_cpu ⇐ cage_baseline + 5pp absolute - C4:
route_engaged == Y(no “treat-as-regular-surface” cheat)
All four must hold for Phase 7 verification.
Locked rows (snapshot 2026-05-02)
| phase | compositor | drops | frames_total | drop_pct | drops_post_warmup | kwin_wayland_cpu | route_engaged | role |
|---|---|---|---|---|---|---|---|---|
| phase0_handover_kwin | kwin | 58 | 1498 | 3.87 | 29 | 20.5 | Y | handover |
| phase0_handover_cage | cage_nested | 7 | 1686 | 0.42 | 0 | (not captured) | Y | handover |
| phase1_goal_target | kwin | 10 | 1440 | 0.69 | 0 | cage_baseline + 5pp | Y | metric |
Full row schema (window_s, warmup_s, effective_fps, source, date) lives in the raw CSV attachment.
Provenance
phase0_handover_kwin—ohm_gl_fix:phase3_remeasure_2026-05-02/A2_brave_drops_findings.md, 2026-05-02.phase0_handover_cage—ohm_gl_fix:phase3_remeasure_2026-05-02/task25_cage_vs_kwin_decisive.md, 2026-05-02.phase1_goal_target— phase1_lock, 2026-05-02.
kwin_overlay_subsurface/metrics.1777744279.txt.gz · Last modified: by markus_fritsche
