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CudaDebugUtils.cuh
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CudaDebugUtils.cuh
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// Copyright 2004-present Facebook. All Rights Reserved.
#pragma once
#include <stdio.h> // for printf
namespace facebook { namespace cuda {
// Collection of CUDA debugging utilities
//
// PRINT_DEBUG
// These are macros since we need to concatenate fmt strings and only
// each printf() is atomic, and doing work in device land to
// concatenate strings is too much
//
#ifdef ENABLE_CUDA_DEBUG
#define PRINT_DEBUG(FMT, ...) { \
if (gridDim.y == 1 && gridDim.z == 1) { \
if (blockDim.y == 1 && blockDim.z == 1) { \
printf("(b%d t%d) " FMT "\n", \
blockIdx.x, \
threadIdx.x, __VA_ARGS__); \
} else if (blockDim.z == 1) { \
printf("(b%d t%d/%d) " FMT "\n", \
blockIdx.x, \
threadIdx.x, threadIdx.y, __VA_ARGS__); \
} else { \
printf("(b%d t%d/%d/%d) " FMT "\n", \
blockIdx.x, \
threadIdx.x, threadIdx.y, threadIdx.z, __VA_ARGS__); \
} \
} else if (gridDim.z == 1) { \
if (blockDim.y == 1 && blockDim.z == 1) { \
printf("(b%d/%d t%d) " FMT "\n", \
blockIdx.x, blockIdx.y, \
threadIdx.x, __VA_ARGS__); \
} else if (blockDim.z == 1) { \
printf("(b%d/%d t%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, \
threadIdx.x, threadIdx.y, __VA_ARGS__); \
} else { \
printf("(b%d/%d t%d/%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, \
threadIdx.x, threadIdx.y, threadIdx.z, __VA_ARGS__); \
} \
} else { \
if (blockDim.y == 1 && blockDim.z == 1) { \
printf("(b%d/%d/%d t%d) " FMT "\n", \
blockIdx.x, blockIdx.y, blockIdx.z, \
threadIdx.x, __VA_ARGS__); \
} else if (blockDim.z == 1) { \
printf("(b%d/%d/%d t%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, blockIdx.z, \
threadIdx.x, threadIdx.y, __VA_ARGS__); \
} else { \
printf("(b%d/%d/%d t%d/%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, blockIdx.z, \
threadIdx.x, threadIdx.y, threadIdx.z, __VA_ARGS__); \
} \
} \
}
#define PRINT_DEBUG0(FMT) { \
if (gridDim.y == 1 && gridDim.z == 1) { \
if (blockDim.y == 1 && blockDim.z == 1) { \
printf("(b%d t%d) " FMT "\n", \
blockIdx.x, \
threadIdx.x); \
} else if (blockDim.z == 1) { \
printf("(b%d t%d/%d) " FMT "\n", \
blockIdx.x, \
threadIdx.x, threadIdx.y); \
} else { \
printf("(b%d t%d/%d/%d) " FMT "\n", \
blockIdx.x, \
threadIdx.x, threadIdx.y, threadIdx.z); \
} \
} else if (gridDim.z == 1) { \
if (blockDim.y == 1 && blockDim.z == 1) { \
printf("(b%d/%d t%d) " FMT "\n", \
blockIdx.x, blockIdx.y, \
threadIdx.x); \
} else if (blockDim.z == 1) { \
printf("(b%d/%d t%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, \
threadIdx.x, threadIdx.y); \
} else { \
printf("(b%d/%d t%d/%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, \
threadIdx.x, threadIdx.y, threadIdx.z); \
} \
} else { \
if (blockDim.y == 1 && blockDim.z == 1) { \
printf("(b%d/%d/%d t%d) " FMT "\n", \
blockIdx.x, blockIdx.y, blockIdx.z, \
threadIdx.x); \
} else if (blockDim.z == 1) { \
printf("(b%d/%d/%d t%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, blockIdx.z, \
threadIdx.x, threadIdx.y); \
} else { \
printf("(b%d/%d/%d t%d/%d/%d) " FMT "\n", \
blockIdx.x, blockIdx.y, blockIdx.z, \
threadIdx.x, threadIdx.y, threadIdx.z); \
} \
} \
}
//
// PRINT_UNIQUE_DEBUG
// Only prints once, on the first thread in the first block
//
__device__ __forceinline__
bool isFirstThread() {
return (threadIdx.x == 0 && threadIdx.y == 0 && threadIdx.z == 0 &&
blockIdx.x == 0 && blockIdx.y == 0 && blockIdx.z == 0);
}
#define PRINT_UNIQUE_DEBUG(FMT, ...) { \
if (isFirstThread()) { \
PRINT_DEBUG(FMT, __VA_ARGS__); \
} \
}
#define PRINT_UNIQUE_DEBUG0(FMT) { \
if (isFirstThread()) { \
PRINT_DEBUG0(FMT); \
} \
}
#else
#define PRINT_DEBUG(FMT, ...)
#define PRINT_DEBUG0(FMT)
#define PRINT_UNIQUE_DEBUG(FMT, ...)
#define PRINT_UNIQUE_DEBUG0(FMT)
#endif // ENABLE_CUDA_DEBUG
} } // namespace