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LJC00118
feef9ef6c8
* Enhance Cast vectorized * Add Parallel vectorized cast test * code lint * merge newest commit
108 lines
3.4 KiB
Python
108 lines
3.4 KiB
Python
import torch
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import tilelang.testing
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import tilelang.language as T
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str2dtype = {
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"float32": torch.float32,
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"float16": torch.float16,
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"bfloat16": torch.bfloat16,
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"float8_e4m3": torch.float8_e4m3fn,
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"float8_e5m2": torch.float8_e5m2,
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}
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@tilelang.jit
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def vectorized_cast_kernel(M: int, dtype_A: str, dtype_B: str):
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assert M % 256 == 0
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@T.prim_func
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def main(
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A: T.Tensor[(M,), dtype_A], # noqa: F821
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B: T.Tensor[(M,), dtype_B], # noqa: F821
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):
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with T.Kernel(1, threads=128):
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T.copy(A, B)
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return main
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@tilelang.jit
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def parallel_vectorized_cast_kernel(M: int, dtype_A: str, dtype_B: str):
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assert M % 256 == 0
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@T.prim_func
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def main(
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A: T.Tensor[(M,), dtype_A], # noqa: F821
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B: T.Tensor[(M,), dtype_B], # noqa: F821
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):
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with T.Kernel(1, threads=128):
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A_local = T.alloc_fragment((M,), dtype_A)
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B_local = T.alloc_fragment((M,), dtype_B)
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T.copy(A, A_local)
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for i in T.Parallel(M):
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B_local[i] = A_local[i]
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T.copy(B_local, B)
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return main
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def run_vectorized_cast(src_dtype_str: str, dst_dtype_str: str, check_str: str, lanes: int = 2):
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"""Run the vectorized cast kernel and check the correctness.
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Args:
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src_dtype_str: The source data type string.
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dst_dtype_str: The destination data type string.
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check_str: Used to ensure vectorized cast is used.
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lanes: The number of lanes of the source and destination data types.
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"""
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M = 128 * lanes
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kernel = vectorized_cast_kernel(M, src_dtype_str, dst_dtype_str)
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kernel_parallel = parallel_vectorized_cast_kernel(M, src_dtype_str, dst_dtype_str)
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A = torch.randn(M, dtype=str2dtype[src_dtype_str]).cuda()
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B = torch.zeros(M, dtype=str2dtype[dst_dtype_str]).cuda()
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C = torch.zeros(M, dtype=str2dtype[dst_dtype_str]).cuda()
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kernel(A, B)
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kernel_parallel(A, C)
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torch.testing.assert_close(A.to(str2dtype[dst_dtype_str]), B)
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torch.testing.assert_close(A.to(str2dtype[dst_dtype_str]), C)
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code = kernel.get_kernel_source()
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code_parallel = kernel_parallel.get_kernel_source()
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assert check_str in code and check_str in code_parallel, \
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f"Cast {src_dtype_str} to {dst_dtype_str} with {lanes=} is not vectorized!"
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def test_vectorized_cast():
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# fp32 -> fp16
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run_vectorized_cast("float32", "float16", "__float22half2_rn", 2)
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run_vectorized_cast("float32", "float16", "__float22half2_rn", 4)
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# fp16 -> fp32
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run_vectorized_cast("float16", "float32", "__half22float2", 2)
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run_vectorized_cast("float16", "float32", "__half22float2", 4)
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# fp32 -> fp8_e4m3
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run_vectorized_cast("float32", "float8_e4m3", "__nv_cvt_float2_to_fp8x2", 2)
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run_vectorized_cast("float32", "float8_e4m3", "__nv_cvt_float2_to_fp8x2", 4)
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# fp32 -> fp8_e5m2
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run_vectorized_cast("float32", "float8_e5m2", "__nv_cvt_float2_to_fp8x2", 2)
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run_vectorized_cast("float32", "float8_e5m2", "__nv_cvt_float2_to_fp8x2", 4)
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# fp32 -> bf16
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run_vectorized_cast("float32", "bfloat16", "__float22bfloat162_rn", 2)
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run_vectorized_cast("float32", "bfloat16", "__float22bfloat162_rn", 4)
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# bf16 -> fp32
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run_vectorized_cast("bfloat16", "float32", "__bfloat1622float2", 2)
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run_vectorized_cast("bfloat16", "float32", "__bfloat1622float2", 4)
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if __name__ == "__main__":
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tilelang.testing.main()
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