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aditya4d1 avatar aditya4d1 commented on July 26, 2024

Hi,
The warpSize between NVIDIA and AMD GPUs are different. Which are 32 for NVIDIA and 64 for AMD. If you take a look at HIP source, hipWarpSize is a macro of value 64. HIP automatically translates to platform dependent value during compilation

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ekondis avatar ekondis commented on July 26, 2024

The problem is that hipcc does not recognize hipWarpSize. Trying to compile a hipified kernel returns error on hipWarpSize:

test-hipwarpsize.cpp:8:23: error: use of undeclared identifier 'hipWarpSize'
        g_data[i] = gridSize+hipWarpSize;
                             ^
1 error generated.
Died at /opt/rocm/bin/hipcc line 230.

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aditya4d1 avatar aditya4d1 commented on July 26, 2024

@mangupta @bensander any comments?

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