#include <settings.h>

Static Public Member Functions
static const _Settings &	get () throw ()

static void	set (_Settings &) throw ()

Public Attributes
_SequenceIndex	accumulate_minimal_n

unsigned int	adjacent_difference_minimal_n

_AlgorithmStrategy	algorithm_strategy

unsigned int	cache_line_size

_SequenceIndex	count_minimal_n

_SequenceIndex	fill_minimal_n

_FindAlgorithm	find_algorithm

double	find_increasing_factor

_SequenceIndex	find_initial_block_size

_SequenceIndex	find_maximum_block_size

float	find_scale_factor

_SequenceIndex	find_sequential_search_size

_SequenceIndex	for_each_minimal_n

_SequenceIndex	generate_minimal_n

unsigned long long	L1_cache_size

unsigned long long	L2_cache_size

_SequenceIndex	max_element_minimal_n

_SequenceIndex	merge_minimal_n

unsigned int	merge_oversampling

_SplittingAlgorithm	merge_splitting

_SequenceIndex	min_element_minimal_n

_MultiwayMergeAlgorithm	multiway_merge_algorithm

int	multiway_merge_minimal_k

_SequenceIndex	multiway_merge_minimal_n

unsigned int	multiway_merge_oversampling

_SplittingAlgorithm	multiway_merge_splitting

_SequenceIndex	nth_element_minimal_n

_SequenceIndex	partial_sort_minimal_n

_PartialSumAlgorithm	partial_sum_algorithm

float	partial_sum_dilation

unsigned int	partial_sum_minimal_n

double	partition_chunk_share

_SequenceIndex	partition_chunk_size

_SequenceIndex	partition_minimal_n

_SequenceIndex	qsb_steals

unsigned int	random_shuffle_minimal_n

_SequenceIndex	replace_minimal_n

_SequenceIndex	search_minimal_n

_SequenceIndex	set_difference_minimal_n

_SequenceIndex	set_intersection_minimal_n

_SequenceIndex	set_symmetric_difference_minimal_n

_SequenceIndex	set_union_minimal_n

_SortAlgorithm	sort_algorithm

_SequenceIndex	sort_minimal_n

unsigned int	sort_mwms_oversampling

unsigned int	sort_qs_num_samples_preset

_SequenceIndex	sort_qsb_base_case_maximal_n

_SplittingAlgorithm	sort_splitting

unsigned int	TLB_size

_SequenceIndex	transform_minimal_n

_SequenceIndex	unique_copy_minimal_n

_SequenceIndex	workstealing_chunk_size

Detailed Description

class _Settings Run-time settings for the parallel mode including all tunable parameters.

Definition at line 122 of file settings.h.

Constructor & Destructor Documentation

◆ _Settings()

__gnu_parallel::_Settings::_Settings ( )

inlineexplicit

Definition at line 286 of file settings.h.

Member Function Documentation

◆ get()

static const _Settings & __gnu_parallel::_Settings::get	(	)
throw	(
	)

static

Get the global settings.

◆ set()

static void __gnu_parallel::_Settings::set	(	_Settings &	)
throw	(
	)

static

Set the global settings.

Member Data Documentation

◆ accumulate_minimal_n

_SequenceIndex __gnu_parallel::_Settings::accumulate_minimal_n

Minimal input size for accumulate.

Definition at line 138 of file settings.h.

◆ adjacent_difference_minimal_n

unsigned int __gnu_parallel::_Settings::adjacent_difference_minimal_n

Minimal input size for adjacent_difference.

Definition at line 141 of file settings.h.

◆ algorithm_strategy

_AlgorithmStrategy __gnu_parallel::_Settings::algorithm_strategy

Definition at line 124 of file settings.h.

◆ cache_line_size

unsigned int __gnu_parallel::_Settings::cache_line_size

Overestimation of cache line size. Used to avoid false sharing, i.e. elements of different threads are at least this amount apart.

Definition at line 264 of file settings.h.

Referenced by __gnu_parallel::__for_each_template_random_access_workstealing().

◆ count_minimal_n

_SequenceIndex __gnu_parallel::_Settings::count_minimal_n

Minimal input size for count and count_if.

Definition at line 144 of file settings.h.

◆ fill_minimal_n

_SequenceIndex __gnu_parallel::_Settings::fill_minimal_n

Minimal input size for fill.

Definition at line 147 of file settings.h.

◆ find_algorithm

_FindAlgorithm __gnu_parallel::_Settings::find_algorithm

Definition at line 129 of file settings.h.

◆ find_increasing_factor

double __gnu_parallel::_Settings::find_increasing_factor

Block size increase factor for find.

Definition at line 150 of file settings.h.

◆ find_initial_block_size

_SequenceIndex __gnu_parallel::_Settings::find_initial_block_size

Initial block size for find.

Definition at line 153 of file settings.h.

Referenced by __gnu_parallel::__find_template().

◆ find_maximum_block_size

_SequenceIndex __gnu_parallel::_Settings::find_maximum_block_size

Maximal block size for find.

Definition at line 156 of file settings.h.

◆ find_scale_factor

float __gnu_parallel::_Settings::find_scale_factor

Block size scale-down factor with respect to current position.

Definition at line 275 of file settings.h.

Referenced by __gnu_parallel::__find_template().

◆ find_sequential_search_size

_SequenceIndex __gnu_parallel::_Settings::find_sequential_search_size

Start with looking for this many elements sequentially, for find.

Definition at line 159 of file settings.h.

Referenced by __gnu_parallel::__find_template(), and __gnu_parallel::__find_template().

◆ for_each_minimal_n

_SequenceIndex __gnu_parallel::_Settings::for_each_minimal_n

Minimal input size for for_each.

Definition at line 162 of file settings.h.

◆ generate_minimal_n

_SequenceIndex __gnu_parallel::_Settings::generate_minimal_n

Minimal input size for generate.

Definition at line 165 of file settings.h.

◆ L1_cache_size

unsigned long long __gnu_parallel::_Settings::L1_cache_size

size of the L1 cache in bytes (underestimation).

Definition at line 253 of file settings.h.

◆ L2_cache_size

unsigned long long __gnu_parallel::_Settings::L2_cache_size

size of the L2 cache in bytes (underestimation).

Definition at line 256 of file settings.h.

Referenced by __gnu_parallel::__parallel_random_shuffle_drs(), and __gnu_parallel::__sequential_random_shuffle().

◆ max_element_minimal_n

_SequenceIndex __gnu_parallel::_Settings::max_element_minimal_n

Minimal input size for max_element.

Definition at line 168 of file settings.h.

◆ merge_minimal_n

_SequenceIndex __gnu_parallel::_Settings::merge_minimal_n

Minimal input size for merge.

Definition at line 171 of file settings.h.

◆ merge_oversampling

unsigned int __gnu_parallel::_Settings::merge_oversampling

Oversampling factor for merge.

Definition at line 174 of file settings.h.

Referenced by __gnu_parallel::multiway_merge_sampling_splitting(), and __gnu_parallel::parallel_multiway_merge().

◆ merge_splitting

_SplittingAlgorithm __gnu_parallel::_Settings::merge_splitting

Definition at line 132 of file settings.h.

◆ min_element_minimal_n

_SequenceIndex __gnu_parallel::_Settings::min_element_minimal_n

Minimal input size for min_element.

Definition at line 177 of file settings.h.

◆ multiway_merge_algorithm

_MultiwayMergeAlgorithm __gnu_parallel::_Settings::multiway_merge_algorithm

Definition at line 128 of file settings.h.

◆ multiway_merge_minimal_k

int __gnu_parallel::_Settings::multiway_merge_minimal_k

Oversampling factor for multiway_merge.

Definition at line 183 of file settings.h.

◆ multiway_merge_minimal_n

_SequenceIndex __gnu_parallel::_Settings::multiway_merge_minimal_n

Minimal input size for multiway_merge.

Definition at line 180 of file settings.h.

◆ multiway_merge_oversampling

unsigned int __gnu_parallel::_Settings::multiway_merge_oversampling

Oversampling factor for multiway_merge.

Definition at line 186 of file settings.h.

◆ multiway_merge_splitting

_SplittingAlgorithm __gnu_parallel::_Settings::multiway_merge_splitting

Definition at line 133 of file settings.h.

◆ nth_element_minimal_n

_SequenceIndex __gnu_parallel::_Settings::nth_element_minimal_n

Minimal input size for nth_element.

Definition at line 189 of file settings.h.

Referenced by __gnu_parallel::__parallel_nth_element().

◆ partial_sort_minimal_n

_SequenceIndex __gnu_parallel::_Settings::partial_sort_minimal_n

Minimal input size for partial_sort.

Definition at line 202 of file settings.h.

◆ partial_sum_algorithm

_PartialSumAlgorithm __gnu_parallel::_Settings::partial_sum_algorithm

Definition at line 127 of file settings.h.

◆ partial_sum_dilation

float __gnu_parallel::_Settings::partial_sum_dilation

Ratio for partial_sum. Assume "sum and write result" to be this factor slower than just "sum".

Definition at line 206 of file settings.h.

Referenced by __gnu_parallel::__parallel_partial_sum_linear().

◆ partial_sum_minimal_n

unsigned int __gnu_parallel::_Settings::partial_sum_minimal_n

Minimal input size for partial_sum.

Definition at line 209 of file settings.h.

◆ partition_chunk_share

double __gnu_parallel::_Settings::partition_chunk_share

Chunk size for partition, relative to input size. If > 0.0, this value overrides partition_chunk_size.

Definition at line 196 of file settings.h.

Referenced by __gnu_parallel::__parallel_partition().

◆ partition_chunk_size

_SequenceIndex __gnu_parallel::_Settings::partition_chunk_size

Chunk size for partition.

Definition at line 192 of file settings.h.

Referenced by __gnu_parallel::__parallel_partition().

◆ partition_minimal_n

_SequenceIndex __gnu_parallel::_Settings::partition_minimal_n

Minimal input size for partition.

Definition at line 199 of file settings.h.

Referenced by __gnu_parallel::__parallel_nth_element().

◆ qsb_steals

_SequenceIndex __gnu_parallel::_Settings::qsb_steals

The number of stolen ranges in load-balanced quicksort.

Definition at line 269 of file settings.h.

◆ random_shuffle_minimal_n

unsigned int __gnu_parallel::_Settings::random_shuffle_minimal_n

Minimal input size for random_shuffle.

Definition at line 212 of file settings.h.

◆ replace_minimal_n

_SequenceIndex __gnu_parallel::_Settings::replace_minimal_n

Minimal input size for replace and replace_if.

Definition at line 215 of file settings.h.

◆ search_minimal_n

_SequenceIndex __gnu_parallel::_Settings::search_minimal_n

Minimal input size for search and search_n.

Definition at line 272 of file settings.h.

◆ set_difference_minimal_n

_SequenceIndex __gnu_parallel::_Settings::set_difference_minimal_n

Minimal input size for set_difference.

Definition at line 218 of file settings.h.

◆ set_intersection_minimal_n

_SequenceIndex __gnu_parallel::_Settings::set_intersection_minimal_n

Minimal input size for set_intersection.

Definition at line 221 of file settings.h.

◆ set_symmetric_difference_minimal_n

_SequenceIndex __gnu_parallel::_Settings::set_symmetric_difference_minimal_n

Minimal input size for set_symmetric_difference.

Definition at line 224 of file settings.h.

◆ set_union_minimal_n

_SequenceIndex __gnu_parallel::_Settings::set_union_minimal_n

Minimal input size for set_union.

Definition at line 227 of file settings.h.

◆ sort_algorithm

_SortAlgorithm __gnu_parallel::_Settings::sort_algorithm

Definition at line 126 of file settings.h.

◆ sort_minimal_n

_SequenceIndex __gnu_parallel::_Settings::sort_minimal_n

Minimal input size for parallel sorting.

Definition at line 230 of file settings.h.

◆ sort_mwms_oversampling

unsigned int __gnu_parallel::_Settings::sort_mwms_oversampling

Oversampling factor for parallel std::sort (MWMS).

Definition at line 233 of file settings.h.

Referenced by __gnu_parallel::parallel_sort_mwms(), and __gnu_parallel::parallel_sort_mwms_pu().

◆ sort_qs_num_samples_preset

unsigned int __gnu_parallel::_Settings::sort_qs_num_samples_preset

Such many samples to take to find a good pivot (quicksort).

Definition at line 236 of file settings.h.

◆ sort_qsb_base_case_maximal_n

_SequenceIndex __gnu_parallel::_Settings::sort_qsb_base_case_maximal_n

Maximal subsequence __length to switch to unbalanced __base case. Applies to std::sort with dynamically load-balanced quicksort.

Definition at line 240 of file settings.h.

Referenced by __gnu_parallel::__qsb_local_sort_with_helping().

◆ sort_splitting

_SplittingAlgorithm __gnu_parallel::_Settings::sort_splitting

Definition at line 131 of file settings.h.

◆ TLB_size

unsigned int __gnu_parallel::_Settings::TLB_size

size of the Translation Lookaside Buffer (underestimation).

Definition at line 259 of file settings.h.