CUDA Academy · Lesson

Hints via cudaMemAdvise

Guiding the driver's placement choices.

Advise, Do Not Command

Prefetch moves data now; cudaMemAdvise instead tells the driver how you plan to use a region so it can place pages smartly over time.

You pass the pointer, byte count, an advice flag, and a device id. The driver folds that hint into its future migration decisions.

cudaMemAdvise(data, bytes, advice, device);