Explicit use local memory

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi， i want to do some tests on local memory，as the programming guide saied，
there are three situation that compiler will use local memory：

  • Arrays for which it cannot determine that they are indexed with constant quantities,
  • Large structures or arrays that would consume too much register space,
  • Any variable if the kernel uses more registers than available (this is also known as register spilling ).

is there any instructions explicit define an array stores in Local Memory？

2

At the SASS level the explicit local memory load and store instructions are LDL and STL. There are no extensions in CUDA C++ that explicitly manipulate local memory. The compiler makes those decisions.

The PTX instructions would ld.local and st.local. However these are also compiled and may disappear depending on compiler decisions.

3

ok，i got it. thanks for reply，