If WDDM is an operating system, then Video Memory Management (VidMm) is its heart. With WDDM 2.0+,...
If WDDM is an operating system, then Video Memory Management (VidMm) is its heart. With WDDM 2.0+, the logic of memory management underwent a fundamental shift from "OS-applied patching" to "driver/application-managed state."
Physical Perspective: Implementation of Memory Segments
The driver describes the GPU's physical memory layout to the OS through "memory segments." This is primarily accomplished through two calls to DxgkDdiQueryAdapterInfo.
Implementation Flow:
First Call (Get Count):
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