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Merged latest reduction improvements

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This commit is contained in:
Benoit Steiner 2016-05-26 12:19:33 -07:00
commit 28fcb5ca2a
3 changed files with 73 additions and 0 deletions
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8
unsupported/Eigen/CXX11/src/Tensor/TensorReduction.h
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@ -325,7 +325,11 @@ __global__ void ReductionInitFullReduxKernelHalfFloat(R, const S, I, half2*);
template <int B, int N, typename S, typename R, typename I>
__global__ void FullReductionKernelHalfFloat(R, const S, I, half*, half2*);
template <int NPT, typename S, typename R, typename I>
<<<<<<< local
__global__ void InnerReductionKernelHalfFloat(R, const S, I, I, half*);
=======
__global__ void InnerReductionKernelHalfFloat(R, const S, I, I, half*, half2*);
>>>>>>> other
#endif
@ -620,7 +624,11 @@ struct TensorEvaluator<const TensorReductionOp<Op, Dims, ArgType>, Device>
#ifdef EIGEN_HAS_CUDA_FP16
template <typename S, typename R, typename I> friend void internal::ReductionInitFullReduxKernelHalfFloat(R, const S, I, half2*);
template <int B, int N, typename S, typename R, typename I> friend void internal::FullReductionKernelHalfFloat(R, const S, I, half*, half2*);
<<<<<<< local
template <int NPT, typename S, typename R, typename I> friend void internal::InnerReductionKernelHalfFloat(R, const S, I, I, half*);
=======
template <int NPT, typename S, typename R, typename I> friend void internal::InnerReductionKernelHalfFloat(R, const S, I, I, half*, half2*);
>>>>>>> other
#endif
template <int NPT, typename S, typename R, typename I> friend void internal::InnerReductionKernel(R, const S, I, I, typename S::CoeffReturnType*);

60
unsupported/Eigen/CXX11/src/Tensor/TensorReductionCuda.h
View File

@ -391,8 +391,13 @@ __global__ void InnerReductionKernelHalfFloat(Reducer reducer, const Self input,
eigen_assert(NumPerThread % unroll_times == 0);
eigen_assert(unroll_times % 2 == 0);
<<<<<<< local
const Index input_col_blocks = divup<Index>(num_coeffs_to_reduce, blockDim.x * NumPerThread * 2);
const Index num_input_blocks = divup<Index>(input_col_blocks * num_preserved_coeffs, 2);
=======
const Index input_col_blocks = divup<Index>(num_coeffs_to_reduce, blockDim.x * NumPerThread/2);
const Index num_input_blocks = input_col_blocks * num_preserved_coeffs;
>>>>>>> other
const Index num_threads = blockDim.x * gridDim.x;
const Index thread_id = blockIdx.x * blockDim.x + threadIdx.x;
@ -401,8 +406,12 @@ __global__ void InnerReductionKernelHalfFloat(Reducer reducer, const Self input,
if (gridDim.x == 1) {
Index i = 2*thread_id;
for (; i + 1 < num_preserved_coeffs; i += 2*num_threads) {
<<<<<<< local
half* loc = output + i;
*((half2*)loc) = reducer.template initializePacket<half2>();
=======
((half2*)output)[i] = reducer.template initializePacket<half2>();
>>>>>>> other
}
if (i < num_preserved_coeffs) {
output[i] = reducer.initialize();
@ -410,8 +419,13 @@ __global__ void InnerReductionKernelHalfFloat(Reducer reducer, const Self input,
__syncthreads();
}
<<<<<<< local
for (Index i = blockIdx.x; i < num_input_blocks; i += gridDim.x) {
const Index row = 2 * (i / input_col_blocks);
=======
for (Index i = 2*blockIdx.x; i < num_input_blocks; i += 2*gridDim.x) {
const Index row = i / input_col_blocks;
>>>>>>> other
if (row + 1 < num_preserved_coeffs) {
const Index col_block = i % input_col_blocks;
@ -432,10 +446,18 @@ __global__ void InnerReductionKernelHalfFloat(Reducer reducer, const Self input,
}
if (col < num_coeffs_to_reduce) {
// Peel;
<<<<<<< local
const half last1 = input.m_impl.coeff(row * num_coeffs_to_reduce + col);
=======
const half last1 = input.m_impl.coeff(row * num_coeffs_to_reduce + col+1);
>>>>>>> other
const half2 val1 = __halves2half2(last1, reducer.initialize());
reducer.reducePacket(val1, &reduced_val1);
<<<<<<< local
const half last2 = input.m_impl.coeff((row+1) * num_coeffs_to_reduce + col);
=======
const half last2 = input.m_impl.coeff((row+1) * num_coeffs_to_reduce + col+1);
>>>>>>> other
const half2 val2 = __halves2half2(last2, reducer.initialize());
reducer.reducePacket(val2, &reduced_val2);
}
@ -444,9 +466,17 @@ __global__ void InnerReductionKernelHalfFloat(Reducer reducer, const Self input,
// Faster version of the loop with no branches after unrolling.
#pragma unroll
for (int k = 0; k < unroll_times; ++k) {
<<<<<<< local
const Index col = col_begin + blockDim.x * (j + k) * 2;
=======
const Index col = col_begin + blockDim.x * (j + k);
>>>>>>> other
reducer.reducePacket(input.m_impl.template packet<Unaligned>(row * num_coeffs_to_reduce + col), &reduced_val1);
<<<<<<< local
reducer.reducePacket(input.m_impl.template packet<Unaligned>((row + 1)* num_coeffs_to_reduce + col), &reduced_val2);
=======
reducer.reducePacket(input.m_impl.template packet<Unaligned>((row +1)* num_coeffs_to_reduce + col), &reduced_val2);
>>>>>>> other
}
}
}
@ -464,8 +494,12 @@ __global__ void InnerReductionKernelHalfFloat(Reducer reducer, const Self input,
half2 val = __halves2half2(val1, val2);
if ((threadIdx.x & (warpSize - 1)) == 0) {
<<<<<<< local
half* loc = output + row;
atomicReduce((half2*)loc, val, reducer);
=======
atomicReduce(&(((half2*)output)[row]), val, reducer);
>>>>>>> other
}
}
}
@ -520,19 +554,33 @@ struct InnerReductionLauncher {
static bool run(const Self& self, Op& reducer, const GpuDevice& device, half* output, typename Self::Index num_coeffs_to_reduce, typename Self::Index num_preserved_vals) {
typedef typename Self::Index Index;
<<<<<<< local
if (num_preserved_vals % 2 != 0) {
// Not supported yet, revert to the slower code path
std::cout << "BYPASSING OPTIMIZED CODE PATH" << std::endl;
=======
// It's faster to use the usual code.
if (num_coeffs_to_reduce <= 32) {
>>>>>>> other
return true;
}
const Index num_coeffs = num_coeffs_to_reduce * num_preserved_vals;
<<<<<<< local
const int block_size = /*256*/128;
const int num_per_thread = /*128*/64;
=======
const int block_size = 256;
const int num_per_thread = 128;
>>>>>>> other
const int dyn_blocks = divup<int>(num_coeffs, block_size * num_per_thread);
const int max_blocks = device.getNumCudaMultiProcessors() *
device.maxCudaThreadsPerMultiProcessor() / block_size;
const int num_blocks = numext::mini<int>(max_blocks, dyn_blocks);
<<<<<<< local
=======
half2* scratch = static_cast<half2*>(device.scratchpad());
>>>>>>> other
if (num_blocks > 1) {
// We initialize the outputs outside the reduction kernel when we can't be sure that there
@ -542,11 +590,19 @@ struct InnerReductionLauncher {
device.maxCudaThreadsPerMultiProcessor() / 1024;
const int num_blocks = numext::mini<int>(max_blocks, dyn_blocks);
LAUNCH_CUDA_KERNEL((ReductionInitKernelHalfFloat<Self, Op, Index>),
<<<<<<< local
1, 1, 0, device, reducer, self, num_preserved_vals, output);
=======
1, 1, 0, device, reducer, self, num_preserved_vals, scratch);
>>>>>>> other
}
LAUNCH_CUDA_KERNEL((InnerReductionKernelHalfFloat<num_per_thread, Self, Op, Index>),
<<<<<<< local
num_blocks, block_size, 0, device, reducer, self, num_coeffs_to_reduce, num_preserved_vals, output);
=======
num_blocks, block_size, 0, device, reducer, self, num_coeffs_to_reduce, num_preserved_vals, output, scratch);
>>>>>>> other
return false;
}
@ -576,10 +632,14 @@ struct InnerReducer<Self, Op, GpuDevice> {
if (num_coeffs == 0) {
return true;
}
<<<<<<< local
// It's faster to use the usual code.
if (num_coeffs_to_reduce <= 128) {
return true;
}
=======
>>>>>>> other
return InnerReductionLauncher<Self, Op>::run(self, reducer, device, output, num_coeffs_to_reduce, num_preserved_vals);
}
};

5
unsupported/test/cxx11_tensor_of_float16_cuda.cu
View File

@ -255,8 +255,13 @@ void test_cuda_reductions(int size1, int size2, int redux) {
Eigen::CudaStreamDevice stream;
Eigen::GpuDevice gpu_device(&stream);
<<<<<<< local
int num_elem = size1*size2;
int result_size = (redux == 1 ? size1 : size2);
=======
int size = 40;
int num_elem = size*size;
>>>>>>> other
float* d_float1 = (float*)gpu_device.allocate(num_elem * sizeof(float));
float* d_float2 = (float*)gpu_device.allocate(num_elem * sizeof(float));