104 lines
3.8 KiB
C++
104 lines
3.8 KiB
C++
/*
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* Copyright 2008-2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// do not attempt to compile this file with any other compiler
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#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC
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#include <thrust/system/cuda/detail/runtime_introspection.h>
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#include <thrust/system/cuda/detail/cuda_launch_config.h>
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#include <thrust/system/cuda/detail/detail/launch_closure.h>
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namespace thrust
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{
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namespace system
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{
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namespace cuda
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{
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namespace detail
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{
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namespace detail
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{
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template <typename Closure>
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launch_calculator<Closure>::launch_calculator(void)
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: properties(device_properties()),
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attributes(closure_attributes<Closure>())
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{}
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template <typename Closure>
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launch_calculator<Closure>::launch_calculator(const device_properties_t& properties, const function_attributes_t& attributes)
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: properties(properties),
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attributes(attributes)
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{}
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template <typename Closure>
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template <typename UnaryFunction>
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thrust::pair<size_t, size_t> launch_calculator<Closure>::default_block_configuration(UnaryFunction block_size_to_smem_size) const
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{
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// choose a block size
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std::size_t num_threads_per_block = block_size_with_maximum_potential_occupancy(attributes, properties, block_size_to_smem_size);
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// choose a subscription rate
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std::size_t num_blocks_per_multiprocessor = properties.maxThreadsPerMultiProcessor / num_threads_per_block;
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return thrust::make_pair(num_threads_per_block, num_blocks_per_multiprocessor);
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}
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template <typename Closure>
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thrust::pair<size_t, size_t> launch_calculator<Closure>::default_block_configuration(void) const
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{
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// choose a block size
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std::size_t num_threads_per_block = block_size_with_maximum_potential_occupancy(attributes, properties);
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// choose a subscription rate
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std::size_t num_blocks_per_multiprocessor = properties.maxThreadsPerMultiProcessor / num_threads_per_block;
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return thrust::make_pair(num_threads_per_block, num_blocks_per_multiprocessor);
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}
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template <typename Closure>
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thrust::tuple<size_t,size_t,size_t> launch_calculator<Closure>::with_variable_block_size(void) const
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{
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thrust::pair<size_t, size_t> config = default_block_configuration();
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return thrust::tuple<size_t,size_t,size_t>(config.second * properties.multiProcessorCount, config.first, 0);
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}
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template <typename Closure>
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template <typename UnaryFunction>
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thrust::tuple<size_t,size_t,size_t> launch_calculator<Closure>::with_variable_block_size(UnaryFunction block_size_to_smem_size) const
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{
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thrust::pair<size_t, size_t> config = default_block_configuration(block_size_to_smem_size);
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return thrust::tuple<size_t,size_t,size_t>(config.second * properties.multiProcessorCount, config.first, block_size_to_smem_size(config.first));
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}
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template <typename Closure>
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thrust::tuple<size_t,size_t,size_t> launch_calculator<Closure>::with_variable_block_size_available_smem(void) const
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{
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thrust::pair<size_t, size_t> config = default_block_configuration();
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size_t smem_per_block = proportional_smem_allocation(properties, attributes, config.second);
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return thrust::tuple<size_t,size_t,size_t>(config.second * properties.multiProcessorCount, config.first, smem_per_block);
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}
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} // end detail
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} // end namespace detail
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} // end namespace cuda
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} // end namespace system
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} // end namespace thrust
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#endif // THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_NVCC
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