D3DKMDT_COMPUTE_PREEMPTION_GRANULARITY enumeration (d3dkmdt.h)

Specifies the capabilities for the preemption of graphic processing unit (GPU) compute shader operations that the display miniport driver supports.

Syntax

typedef enum _D3DKMDT_COMPUTE_PREEMPTION_GRANULARITY {
  D3DKMDT_COMPUTE_PREEMPTION_NONE,
  D3DKMDT_COMPUTE_PREEMPTION_DMA_BUFFER_BOUNDARY,
  D3DKMDT_COMPUTE_PREEMPTION_DISPATCH_BOUNDARY,
  D3DKMDT_COMPUTE_PREEMPTION_THREAD_GROUP_BOUNDARY,
  D3DKMDT_COMPUTE_PREEMPTION_THREAD_BOUNDARY,
  D3DKMDT_COMPUTE_PREEMPTION_SHADER_BOUNDARY
} D3DKMDT_COMPUTE_PREEMPTION_GRANULARITY;

Constants

D3DKMDT_COMPUTE_PREEMPTION_NONE The driver does not support the preemption of GPU compute shader operations. Note  This value also specifies that the driver cannot stop currently running DMA buffers of a specified type and cannot prevent all pending DMA buffers in the hardware queue from running.
D3DKMDT_COMPUTE_PREEMPTION_DMA_BUFFER_BOUNDARY The driver cannot stop currently running DMA buffers of a specified type but can prevent all pending DMA buffers in the hardware queue from running.
D3DKMDT_COMPUTE_PREEMPTION_DISPATCH_BOUNDARY The driver cannot stop currently executing compute shader commands that were dispatched from a thread group but can prevent all pending commands from being dispatched.
D3DKMDT_COMPUTE_PREEMPTION_THREAD_GROUP_BOUNDARY The driver cannot stop currently executing compute shader commands that were dispatched from a thread group but can prevent a thread group from dispatching other commands.
D3DKMDT_COMPUTE_PREEMPTION_THREAD_BOUNDARY The driver cannot stop currently executing compute shader commands that were dispatched from a thread in a thread group but can prevent a thread from dispatching other commands.
D3DKMDT_COMPUTE_PREEMPTION_SHADER_BOUNDARY The driver cannot stop currently running shader commands of a specified type but can prevent all shader commands in the hardware queue from running.

Remarks

Starting with Windows 8, display miniport drivers need to specify the level of preemption granularity supported by the GPU when executing compute shader operations. Because engines on the same adapter may potentially support different preemption levels, the driver should report the coarsest granularity among all engines capable of executing a particular type of compute shader requests.

For example, if one engine supports the preemption of primitive level graphics requests, and another engine supports the preemption of triangle level graphics requests, the driver should report primitive level graphics preemption capability for that adapter.

Requirements

Requirement	Value
Minimum supported client	Windows 8
Minimum supported server	Windows Server 2012
Header	d3dkmdt.h

See also

D3DKMDT_GRAPHICS_PREEMPTION_GRANULARITY

D3DKMDT_PREEMPTION_CAPS