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#include "sortutils.hpp"
/**
* @struct SortResult stores simple information about a sorting time result
*/
struct SortResult
{
std::string title;
std::uint64_t duration;
};
/**
* @param std::string sequentialString: use "Sequential" or "Parallel"
* @param std::vector<struct SortResult>: the list of results from a sorting run
* @return void: format all the sorting results according to program requirements
*/
void formatSortResults(std::string sequentialString, const std::vector<struct SortResult>& results)
{
const std::string timeStr = " Time";
std::uint32_t longestTitle = static_cast<std::uint32_t>(std::max_element(
results.begin(),
results.end(),
[](const struct SortResult s1, const struct SortResult s2) { return s1.title.length() < s2.title.length(); })
->title.length());
std::cout << sequentialString << std::endl;
for (auto sortResult : results)
{
std::cout << fmt::format("\t{0:<{1}} : {2} ms", sortResult.title + timeStr, longestTitle + timeStr.length(), sortResult.duration)
<< std::endl;
}
std::cout << std::endl;
}
/**
* @param std::string title: title of the array type used
* @param std::vector<struct SortResult> sequentialResults: list of results of sequential sorts
* @param std::vector<struct SortResult> parallelResults: list of results of parallel sorts
* @return void: format the results and title according to program requirements
*/
void formatArrayTypeSortResults(std::string title, const std::vector<struct SortResult>& sequentialResults, const std::vector<struct SortResult>& parallelResults)
{
std::cout << fmt::format(" --- {0} Performance ---", title) << std::endl;
formatSortResults("Sequential", sequentialResults);
formatSortResults("Parallel", parallelResults);
}
/**
* @param SourceArray source: source array to copy into->
* @param int[] dest: the raw array to copy source's elements to
* @return void: do the copy
*/
void initializeRawArrayFromStdArray(const SourceArray& source, int dest[])
{
std::copy(std::execution::par, source.begin(), source.end(), dest);
}
/**
* @param SourceArray data: the source data to convert into a "organ pipe" array per program requirements
* @return void: do the piping
*/
void organPipeStdArray(SourceArray& data)
{
float mid = HOW_MANY_ELEMENTS / 2.0;
std::reverse_copy(std::execution::par, data.begin(), data.begin() + static_cast<std::uint32_t>(std::floor(mid)), data.begin() + static_cast<std::uint32_t>(std::ceil(mid)));
}
/**
* @param function<void()> func: the function to time
* @return uint64_t: the milliseconds required to execute func()
*/
std::uint64_t executionMs(std::function<void()> func)
{
std::chrono::time_point start = std::chrono::steady_clock::now();
func();
return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - start).count();
}
/**
* @param SourceArray source: the values to copy into rawArray HOW_MANY_TIMES times
* @param int[] rawArray: the raw array to benchmark
* @param bool parallel: whether to use parallel execution
* @return uint64_t: time (in ms) to sort copied values from source -> rawArray HOW_MANY_TIMES times
*/
std::uint64_t totalTimeToSortRawArrayManyTimes(const SourceArray& source, int rawArray[], bool parallel)
{
std::uint64_t ms = 0;
for (std::uint32_t i = 0; i < HOW_MANY_TIMES; i++)
{
initializeRawArrayFromStdArray(source, rawArray);
if (parallel)
{
ms += executionMs([&rawArray]() -> void { std::sort(std::execution::par_unseq, rawArray, rawArray + HOW_MANY_ELEMENTS); });
}
else
{
ms += executionMs([&rawArray]() -> void { std::sort(std::execution::seq, rawArray, rawArray + HOW_MANY_ELEMENTS); });
}
}
return ms;
}
/**
* @param SourceArray source: the values to copy into rawArray HOW_MANY_TIMES times
* @param SourceArray stdArray: the std::array to benchmark
* @param bool parallel: whether to use parallel execution
* @return uint64_t: time (in ms) to sort copied values from source -> stdArray HOW_MANY_TIMES times
*/
std::uint64_t totalTimeToSortStdArrayManyTimes(const SourceArray& source, SourceArray& stdArray, bool parallel)
{
std::uint64_t ms = 0;
for (std::uint32_t i = 0; i < HOW_MANY_TIMES; i++)
{
std::copy(source.begin(), source.end(), stdArray.begin());
if (parallel)
{
ms += executionMs([&stdArray]() -> void { std::sort(std::execution::par_unseq, stdArray.begin(), stdArray.end()); });
}
else
{
ms += executionMs([&stdArray]() -> void { std::sort(std::execution::seq, stdArray.begin(), stdArray.end()); });
}
}
return ms;
}
/**
* @param SourceArray source: the values to copy into rawArray HOW_MANY_TIMES times
* @param SourceArray stdVector: the vector to benchmark
* @param bool parallel: whether to use parallel execution
* @return uint64_t: time (in ms) to sort copied values from source -> stdVector HOW_MANY_TIMES times
*/
std::uint64_t totalTimeToSortStdVectorManyTimes(const SourceArray& source, std::vector<int>& stdVector, bool parallel)
{
std::uint64_t ms = 0;
for (std::uint32_t i = 0; i < HOW_MANY_TIMES; i++)
{
std::copy(source.begin(), source.end(), stdVector.begin());
if (parallel)
{
ms += executionMs([&stdVector]() -> void { std::sort(std::execution::par_unseq, stdVector.begin(), stdVector.end()); });
}
else
{
ms += executionMs([&stdVector]() -> void { std::sort(std::execution::seq, stdVector.begin(), stdVector.end()); });
}
}
return ms;
}
/**
* @param SourceArray random: a list of random values initialize in main.cpp
* @param SourceArray sorted: random, but sorted in sequential order
* @param SourceArray reversed: sorted, but reversed
* @param SourceArray organPipe: sorted, but "organ-piped"
* @param SourceArray rotated: sorted, but rotated by one
* @return void: format results of the raw array benchmark
*/
void evaluateRawArray(const SourceArray& random, const SourceArray& sorted, const SourceArray& reversed, const SourceArray& organPipe, const SourceArray& rotated)
{
int rawArray[HOW_MANY_ELEMENTS];
std::vector<struct SortResult> seqResults{
{ "Random", totalTimeToSortRawArrayManyTimes(random, rawArray, false) },
{ "Sorted", totalTimeToSortRawArrayManyTimes(sorted, rawArray, false) },
{ "Reversed", totalTimeToSortRawArrayManyTimes(reversed, rawArray, false) },
{ "Organ Piped", totalTimeToSortRawArrayManyTimes(organPipe, rawArray, false) },
{ "Rotated", totalTimeToSortRawArrayManyTimes(rotated, rawArray, false) },
};
std::vector<struct SortResult> parResults{
{ "Random", totalTimeToSortRawArrayManyTimes(random, rawArray, true) },
{ "Sorted", totalTimeToSortRawArrayManyTimes(sorted, rawArray, true) },
{ "Reversed", totalTimeToSortRawArrayManyTimes(reversed, rawArray, true) },
{ "Organ Piped", totalTimeToSortRawArrayManyTimes(organPipe, rawArray, true) },
{ "Rotated", totalTimeToSortRawArrayManyTimes(rotated, rawArray, true) },
};
formatArrayTypeSortResults("Raw Array", seqResults, parResults);
}
/**
* @param SourceArray random: a list of random values initialize in main.cpp
* @param SourceArray sorted: random, but sorted in sequential order
* @param SourceArray reversed: sorted, but reversed
* @param SourceArray organPipe: sorted, but "organ-piped"
* @param SourceArray rotated: sorted, but rotated by one
* @return void: format results of the std array benchmark
*/
void evaluateStdArray(const SourceArray& random, const SourceArray& sorted, const SourceArray& reversed, const SourceArray& organPipe, const SourceArray& rotated)
{
SourceArray stdArray;
std::vector<struct SortResult> seqResults{
{ "Random", totalTimeToSortStdArrayManyTimes(random, stdArray, false) },
{ "Sorted", totalTimeToSortStdArrayManyTimes(sorted, stdArray, false) },
{ "Reversed", totalTimeToSortStdArrayManyTimes(reversed, stdArray, false) },
{ "Organ Piped", totalTimeToSortStdArrayManyTimes(organPipe, stdArray, false) },
{ "Rotated", totalTimeToSortStdArrayManyTimes(rotated, stdArray, false) },
};
std::vector<struct SortResult> parResults{
{ "Random", totalTimeToSortStdArrayManyTimes(random, stdArray, true) },
{ "Sorted", totalTimeToSortStdArrayManyTimes(sorted, stdArray, true) },
{ "Reversed", totalTimeToSortStdArrayManyTimes(reversed, stdArray, true) },
{ "Organ Piped", totalTimeToSortStdArrayManyTimes(organPipe, stdArray, true) },
{ "Rotated", totalTimeToSortStdArrayManyTimes(rotated, stdArray, true) },
};
formatArrayTypeSortResults("std::array", seqResults, parResults);
}
/**
* @param SourceArray random: a list of random values initialize in main.cpp
* @param SourceArray sorted: random, but sorted in sequential order
* @param SourceArray reversed: sorted, but reversed
* @param SourceArray organPipe: sorted, but "organ-piped"
* @param SourceArray rotated: sorted, but rotated by one
* @return void: format results of the std vector benchmark
*/
void evaluateStdVector(const SourceArray& random, const SourceArray& sorted, const SourceArray& reversed, const SourceArray& organPipe, const SourceArray& rotated)
{
std::vector<int> stdVector(HOW_MANY_ELEMENTS);
std::vector<struct SortResult> seqResults{
{ "Random", totalTimeToSortStdVectorManyTimes(random, stdVector, false) },
{ "Sorted", totalTimeToSortStdVectorManyTimes(sorted, stdVector, false) },
{ "Reversed", totalTimeToSortStdVectorManyTimes(reversed, stdVector, false) },
{ "Organ Piped", totalTimeToSortStdVectorManyTimes(organPipe, stdVector, false) },
{ "Rotated", totalTimeToSortStdVectorManyTimes(rotated, stdVector, false) },
};
std::vector<struct SortResult> parResults{
{ "Random", totalTimeToSortStdVectorManyTimes(random, stdVector, true) },
{ "Sorted", totalTimeToSortStdVectorManyTimes(sorted, stdVector, true) },
{ "Reversed", totalTimeToSortStdVectorManyTimes(reversed, stdVector, true) },
{ "Organ Piped", totalTimeToSortStdVectorManyTimes(organPipe, stdVector, true) },
{ "Rotated", totalTimeToSortStdVectorManyTimes(rotated, stdVector, true) },
};
formatArrayTypeSortResults("std::vector", seqResults, parResults);
}
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