merge_sort_perf-inl.h

/*
 * Copyright (c) 2014, Siemens AG. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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#ifndef EMBB_ALGORITHMS_PERF_MERGE_SORT_PERF_INL_H_
#define EMBB_ALGORITHMS_PERF_MERGE_SORT_PERF_INL_H_

#include <embb/base/perf/call_args.h>
#include <embb/base/memory_allocation.h>
#include <embb/algorithms/merge_sort.h>
#include <embb/tasks/tasks.h>
#include <algorithm>
#include <functional>

namespace embb {
namespace algorithms {
namespace perf {

template<typename T>
SerialMergeSort<T>::SerialMergeSort(const embb::base::perf::CallArgs & args)
: cargs(args), vector_size(args.VectorSize()) {
  v = static_cast<T *>(embb::base::Allocation::AllocateCacheAligned(
    vector_size * sizeof(T)));
}

template<typename T>
SerialMergeSort<T>::~SerialMergeSort() {
  embb::base::Allocation::FreeAligned(v);
}

template<typename T>
void SerialMergeSort<T>::Run() {
  std::sort(v, v + vector_size, std::greater<T>());
}

template<typename T>
ParallelMergeSort<T>::ParallelMergeSort(const embb::base::perf::CallArgs & args)
: cargs(args), vector_size(args.VectorSize()) {
  v = static_cast<T *>(embb::base::Allocation::AllocateCacheAligned(
    vector_size * sizeof(T)));
  for (size_t i = 0; i < vector_size; i++) {
    v[i] = static_cast<T>(i);
  }
}

template<typename T>
ParallelMergeSort<T>::~ParallelMergeSort() {
  embb::base::Allocation::FreeAligned(v);
}

template<typename T>
void ParallelMergeSort<T>::Pre() {
  // Initialize input vector with incrementing values:
  for (size_t i = 0; i < vector_size; i++) {
    v[i] = static_cast<T>(i);
  }
}

template<typename T>
void ParallelMergeSort<T>::Run(unsigned int numThreads) {
  // Always reading input values from memory, no CPU-only test possible
  // as mergesort sorts in-place.
  embb::algorithms::MergeSortAllocate(
    v, v + vector_size,
    std::greater<T>(),
    embb::tasks::ExecutionPolicy(),
    vector_size / numThreads);
}

} // namespace perf
} // namespace algorithms
} // namespace embb

#endif  // EMBB_ALGORITHMS_PERF_MERGE_SORT_PERF_INL_H_