In roofline chart, what is "L1 global/local"?

[202476410arsmart]

Hi! I guess L1 should be shared memory or pure L1, but what is global/local??? Global is DRAM, right??? And local memory is also not L1???

Thanks!!

[felix_dt]

The terms “global” and “local” (memory) are explained here in the documentation. You are correct that global memory normally refers to dram. The same is true for local memory, which resides in the same physical memory, but is used for different purposes (e.g. register spilling). “L1” here refers to the L1/Tex cache. The hierarchical roofline chart you are showing models the memory hiercharchy of dram (device memory), L2 and L1 caches, as visualized in the memory chart.