The412Banner 8cb5c2168e feat(hud): GPU load and clock without root where Android blocks kgsl (#1969) ...

On some Adreno devices (the Retroid Pocket Duo) SELinux hides kgsl's sysfs
nodes from apps, so the HUD showed no GPU % and no GPU clock. Devices whose
nodes are readable keep using them; nothing changes there or on GPUs
without kgsl.

Where the nodes are blocked:

- GPU %: a native reader maps kgsl's memstore read-only (any kgsl client
  may) and samples the ringbuffer start/end timestamps once a millisecond
  while a HUD is shown. That covers all GPU work, Android's own
  composition included.
- Backup for GPU %: an implicit Vulkan layer in the guest
  (tools/gpuload) and the compositor time their own GPU work with
  timestamp queries. It runs until the memstore stamps are seen moving,
  and for the whole session if they never move.
- GPU clock: a small GPU job of our own reads the always-on and RBBM
  cycle counters (libgpuclock).

The HUD diagnostics export lists which source each GPU value came from.
tools/gpuload/build.sh takes the Vulkan headers from build_local.sh's NDK
first and keeps NDK paths with spaces intact.

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..

gpuload_busy.h

feat(hud): GPU load and clock without root where Android blocks kgsl (#1969)

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gpuload_ring.h

feat(hud): GPU load and clock without root where Android blocks kgsl (#1969)

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vk_layer_droiddeck_gpuload.c

feat(hud): GPU load and clock without root where Android blocks kgsl (#1969)

2026-11-01 20:22:51 +00:00