When Apple introduced its M3 family of processors this week, it mentioned its GPU Dynamic Caching technology as one of the key advantages of its GPU architecture that allowed it to bring hardware-accelerated ray tracing to its M-series SoCs. Indeed, it looks like Apple has spent years developing this technology and filed the first patent that covers it in early 2020.
Traditional GPUs operate on static caching mechanisms and fixed memory spaces which sometimes results in inefficient management and retrieval of page table information, underutilization of certain physical memory regions, and limitations of allocated memory for certain workloads. Apple's GPU Dynamic Caching ensures that cache and memory spaces are dynamically assigned based on the actual needs of different tasks and workloads. This adaptability ensures optimized memory usage, preventing wastage of memory resources and allowing tasks to access the memory they need (assuming that there is enough memory for a given task).
