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Now that the per-capture worker subprocess makes an NVENC EGL/CUDA driver fault survivable (design/zerocopy-worker-isolation.md), the reason the NVENC zero-copy path stayed opt-in is gone. zerocopy::enabled() now defaults ON for both GPU backends (was ON VAAPI / OFF NVENC). Fallbacks are intact: VAAPI's one-shot CPU auto-downgrade (VAAPI-gated, never trips for NVENC) and NVENC's per-capture fallback + worker-death latch. Reframe the shipped host.env examples and setup guides to rely on the default rather than force PUNKTFUNK_ZEROCOPY=1 (an explicit =1 skips the VAAPI auto-downgrade). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
24 lines
1.6 KiB
Bash
24 lines
1.6 KiB
Bash
# punktfunk host config for a Fedora/Ubuntu KDE Plasma appliance (kwin backend).
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# Copy to ~/.config/punktfunk/host.env. Pairs with punktfunk-kde-session.service, which brings
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# up a headless `kwin --virtual` on wayland-kde (with KWIN_WAYLAND_NO_PERMISSION_CHECKS=1 so the
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# host can bind KWin's privileged zkde_screencast protocol — an interactive Plasma session will
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# NOT hand that protocol to an external client). The host streams a per-client virtual output
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# from that session, captured zero-copy (dmabuf -> CUDA -> NVENC) on NVIDIA.
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WAYLAND_DISPLAY=wayland-kde
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XDG_CURRENT_DESKTOP=KDE
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PUNKTFUNK_COMPOSITOR=kwin
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PUNKTFUNK_VIDEO_SOURCE=virtual
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# GPU zero-copy (dmabuf → CUDA → NVENC) is ON by default; auto-falls back to CPU. Set =0 to force CPU.
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PUNKTFUNK_INPUT_BACKEND=libei
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# UDP Generic Segmentation Offload on the send path: coalesce a frame's equal-size packets into
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# kernel super-buffers (one sendmsg per ~64 packets instead of one per packet) — the dominant
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# lever above ~1 Gbps, where per-packet send syscalls/pps become the host bottleneck. Safe: it
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# auto-falls back to sendmmsg on any kernel/path that rejects UDP_SEGMENT. Set PUNKTFUNK_GSO=0 to
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# force it off if a NIC/middlebox mishandles GSO segments.
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PUNKTFUNK_GSO=1
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# Make the per-session streamed output the SOLE desktop, so plasmashell + windows render on it
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# rather than on the headless session's `kwin --virtual` bootstrap output (without this the client
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# sees only the wallpaper of an empty extended output). KWin re-homes the desktop; the bootstrap is
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# re-enabled on teardown.
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PUNKTFUNK_KWIN_VIRTUAL_PRIMARY=1
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