UAV Typed Atomic Ops

Description

The metric UAV Typed Atomic Ops represents the number of atomic operations performed on typed UAV (Unordered Access View) resources (that is any buffer created with the D3D11_BIND_UNORDERED_ACCESS BindFlag) from within Compute and Pixel Shaders.

Examples

A code example that will result in a UAV Typed Atomic Ops:

RWBuffer<uint>      myUAVBuffer : register( u0 );

[numthreads(NUM_THREADS_PER_GROUP, 1, 1)]

void MyComputeShader(…)

{

       …

       //UAV Typed Atomic Operation

InterlockedAdd(myUAVBuffer[any_idx], 1);

…

}

Improving Performance

There can be negative performance implications from using atomic operations inside of a shader since they will potentially block other shader threads from executing. Be careful when designing a shader to minimize such impacts.

UAV Typed Atomic Ops