diff options
Diffstat (limited to 'Documentation/gpu')
| -rw-r--r-- | Documentation/gpu/amdgpu/thermal.rst | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/Documentation/gpu/amdgpu/thermal.rst b/Documentation/gpu/amdgpu/thermal.rst index 997231b6adcf..5e27e4eb3959 100644 --- a/Documentation/gpu/amdgpu/thermal.rst +++ b/Documentation/gpu/amdgpu/thermal.rst @@ -72,7 +72,8 @@ card's RLC (RunList Controller) firmware powers off the gfx engine dynamically when there is no workload on gfx or compute pipes. GFXOFF is on by default on supported GPUs. -Userspace can interact with GFXOFF through a debugfs interface: +Userspace can interact with GFXOFF through a debugfs interface (all values in +`uint32_t`, unless otherwise noted): ``amdgpu_gfxoff`` ----------------- @@ -104,3 +105,18 @@ Read it to check current GFXOFF's status of a GPU:: If GFXOFF is enabled, the value will be transitioning around [0, 3], always getting into 0 when possible. When it's disabled, it's always at 2. Returns ``-EINVAL`` if it's not supported. + +``amdgpu_gfxoff_count`` +----------------------- + +Read it to get the total GFXOFF entry count at the time of query since system +power-up. The value is an `uint64_t` type, however, due to firmware limitations, +it can currently overflow as an `uint32_t`. *Only supported in vangogh* + +``amdgpu_gfxoff_residency`` +--------------------------- + +Write 1 to amdgpu_gfxoff_residency to start logging, and 0 to stop. Read it to +get average GFXOFF residency % multiplied by 100 during the last logging +interval. E.g. a value of 7854 means 78.54% of the time in the last logging +interval the GPU was in GFXOFF mode. *Only supported in vangogh* |