Open-IOV vGPU-IO: host-side GSP emulation for unmodified NVIDIA guest drivers https://git.vgpu.io/open-iov.git/atom?h=master 2026-10-07T03:02:45+00:00 2026-10-07T03:02:45+00:00 Arthur Hanson Rasmusson arthur@vgpu.io 2026-10-07T03:02:45+00:00 urn:sha1:00765678d59423669fcad6fe56cce9be9bb352e6 reg_sampler.py: high-rate read-only MMIO sampler for the physical GPU's PGRAPH/FECS/SKED/PFIFO registers (FECS current-context valid + pointer, SKED CWD table occupancy/activity, GRFIFO, FE QMD-virt, PMC_ENABLE) with analyze_regs.py for value distributions and transition timelines. Recorded ground truth and register semantics in tools/gr-regs/README.md. Used to capture the live distro-driver CUDA reference (FECS VALID=1, CWD table 0x3f002000 while running) and to observe the ladder's forwarded launch (CWD entry + SKED processing after the mode-35 lane enable).