.TH "__gnu_parallel::_Settings" 3cxx "Thu Aug 2 2012" "libstdc++" \" -*- nroff -*-
.ad l
.nh
.SH NAME
__gnu_parallel::_Settings \- 
.SH SYNOPSIS
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.PP
.SS "Static Public Member Functions"

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.RI "static const \fB_Settings\fP & \fBget\fP ()  throw ()"
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.RI "static void \fBset\fP (\fB_Settings\fP &)  throw ()"
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.SS "Public Attributes"

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.RI "\fBsequence_index_t\fP \fBaccumulate_minimal_n\fP"
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.RI "unsigned int \fBadjacent_difference_minimal_n\fP"
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.RI "\fB_AlgorithmStrategy\fP \fBalgorithm_strategy\fP"
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.RI "unsigned int \fBcache_line_size\fP"
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.RI "\fBsequence_index_t\fP \fBcount_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBfill_minimal_n\fP"
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.RI "\fB_FindAlgorithm\fP \fBfind_algorithm\fP"
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.RI "double \fBfind_increasing_factor\fP"
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.RI "\fBsequence_index_t\fP \fBfind_initial_block_size\fP"
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.RI "\fBsequence_index_t\fP \fBfind_maximum_block_size\fP"
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.RI "\fBsequence_index_t\fP \fBfind_sequential_search_size\fP"
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.RI "\fBsequence_index_t\fP \fBfor_each_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBgenerate_minimal_n\fP"
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.RI "unsigned long long \fBL1_cache_size\fP"
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.RI "unsigned long long \fBL2_cache_size\fP"
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.RI "\fBsequence_index_t\fP \fBmax_element_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBmerge_minimal_n\fP"
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.RI "unsigned int \fBmerge_oversampling\fP"
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.RI "\fB_SplittingAlgorithm\fP \fBmerge_splitting\fP"
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.RI "\fBsequence_index_t\fP \fBmin_element_minimal_n\fP"
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.RI "\fB_MultiwayMergeAlgorithm\fP \fBmultiway_merge_algorithm\fP"
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.RI "int \fBmultiway_merge_minimal_k\fP"
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.RI "\fBsequence_index_t\fP \fBmultiway_merge_minimal_n\fP"
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.RI "unsigned int \fBmultiway_merge_oversampling\fP"
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.RI "\fB_SplittingAlgorithm\fP \fBmultiway_merge_splitting\fP"
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.RI "\fBsequence_index_t\fP \fBnth_element_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBpartial_sort_minimal_n\fP"
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.RI "\fB_PartialSumAlgorithm\fP \fBpartial_sum_algorithm\fP"
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.RI "float \fBpartial_sum_dilation\fP"
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.RI "unsigned int \fBpartial_sum_minimal_n\fP"
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.RI "double \fBpartition_chunk_share\fP"
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.RI "\fBsequence_index_t\fP \fBpartition_chunk_size\fP"
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.RI "\fBsequence_index_t\fP \fBpartition_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBqsb_steals\fP"
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.RI "unsigned int \fBrandom_shuffle_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBreplace_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBset_difference_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBset_intersection_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBset_symmetric_difference_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBset_union_minimal_n\fP"
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.RI "\fB_SortAlgorithm\fP \fBsort_algorithm\fP"
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.RI "\fBsequence_index_t\fP \fBsort_minimal_n\fP"
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.RI "unsigned int \fBsort_mwms_oversampling\fP"
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.RI "unsigned int \fBsort_qs_num_samples_preset\fP"
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.RI "\fBsequence_index_t\fP \fBsort_qsb_base_case_maximal_n\fP"
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.RI "\fB_SplittingAlgorithm\fP \fBsort_splitting\fP"
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.RI "unsigned int \fBTLB_size\fP"
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.RI "\fBsequence_index_t\fP \fBtransform_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBunique_copy_minimal_n\fP"
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.RI "\fBsequence_index_t\fP \fBworkstealing_chunk_size\fP"
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.SH "Detailed Description"
.PP 
class \fB_Settings\fP Run-time settings for the parallel mode, including all tunable parameters\&. 
.PP
Definition at line 118 of file settings\&.h\&.
.SH "Member Function Documentation"
.PP 
.SS "static const \fB_Settings\fP& __gnu_parallel::_Settings::get ()  throw ()\fC [static]\fP"

.PP
Get the global settings\&. 
.PP
Referenced by __gnu_parallel::find_template(), __gnu_parallel::for_each_template_random_access_workstealing(), __gnu_parallel::multiway_merge_sampling_splitting(), __gnu_parallel::parallel_multiway_merge(), __gnu_parallel::parallel_nth_element(), __gnu_parallel::parallel_partial_sum(), __gnu_parallel::parallel_partial_sum_linear(), __gnu_parallel::parallel_partition(), __gnu_parallel::parallel_random_shuffle_drs(), __gnu_parallel::parallel_sort(), __gnu_parallel::parallel_sort_mwms(), __gnu_parallel::parallel_sort_mwms_pu(), __gnu_parallel::parallel_sort_qs_conquer(), __gnu_parallel::qsb_local_sort_with_helping(), and __gnu_parallel::sequential_random_shuffle()\&.
.SS "static void __gnu_parallel::_Settings::set (\fB_Settings\fP &)  throw ()\fC [static]\fP"

.PP
Set the global settings\&. 
.SH "Member Data Documentation"
.PP 
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::accumulate_minimal_n"

.PP
Minimal input size for accumulate\&. 
.PP
Definition at line 134 of file settings\&.h\&.
.SS "unsigned int __gnu_parallel::_Settings::adjacent_difference_minimal_n"

.PP
Minimal input size for adjacent_difference\&. 
.PP
Definition at line 137 of file settings\&.h\&.
.SS "unsigned int __gnu_parallel::_Settings::cache_line_size"

.PP
Overestimation of cache line size\&. Used to avoid false sharing, i\&. e\&. elements of different threads are at least this amount apart\&. 
.PP
Definition at line 260 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::for_each_template_random_access_workstealing()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::count_minimal_n"

.PP
Minimal input size for count and count_if\&. 
.PP
Definition at line 140 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::fill_minimal_n"

.PP
Minimal input size for fill\&. 
.PP
Definition at line 143 of file settings\&.h\&.
.SS "double __gnu_parallel::_Settings::find_increasing_factor"

.PP
Block size increase factor for find\&. 
.PP
Definition at line 146 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::find_initial_block_size"

.PP
Initial block size for find\&. 
.PP
Definition at line 149 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::find_maximum_block_size"

.PP
Maximal block size for find\&. 
.PP
Definition at line 152 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::find_sequential_search_size"

.PP
Start with looking for this many elements sequentially, for find\&. 
.PP
Definition at line 155 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::for_each_minimal_n"

.PP
Minimal input size for for_each\&. 
.PP
Definition at line 158 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::generate_minimal_n"

.PP
Minimal input size for generate\&. 
.PP
Definition at line 161 of file settings\&.h\&.
.SS "unsigned long long __gnu_parallel::_Settings::L1_cache_size"

.PP
Size of the L1 cache in bytes (underestimation)\&. 
.PP
Definition at line 249 of file settings\&.h\&.
.SS "unsigned long long __gnu_parallel::_Settings::L2_cache_size"

.PP
Size of the L2 cache in bytes (underestimation)\&. 
.PP
Definition at line 252 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_random_shuffle_drs(), and __gnu_parallel::sequential_random_shuffle()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::max_element_minimal_n"

.PP
Minimal input size for max_element\&. 
.PP
Definition at line 164 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::merge_minimal_n"

.PP
Minimal input size for merge\&. 
.PP
Definition at line 167 of file settings\&.h\&.
.SS "unsigned int __gnu_parallel::_Settings::merge_oversampling"

.PP
Oversampling factor for merge\&. 
.PP
Definition at line 170 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::multiway_merge_sampling_splitting(), and __gnu_parallel::parallel_multiway_merge()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::min_element_minimal_n"

.PP
Minimal input size for min_element\&. 
.PP
Definition at line 173 of file settings\&.h\&.
.SS "int __gnu_parallel::_Settings::multiway_merge_minimal_k"

.PP
Oversampling factor for multiway_merge\&. 
.PP
Definition at line 179 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::multiway_merge_minimal_n"

.PP
Minimal input size for multiway_merge\&. 
.PP
Definition at line 176 of file settings\&.h\&.
.SS "unsigned int __gnu_parallel::_Settings::multiway_merge_oversampling"

.PP
Oversampling factor for multiway_merge\&. 
.PP
Definition at line 182 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::nth_element_minimal_n"

.PP
Minimal input size for nth_element\&. 
.PP
Definition at line 185 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_nth_element()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::partial_sort_minimal_n"

.PP
Minimal input size for partial_sort\&. 
.PP
Definition at line 198 of file settings\&.h\&.
.SS "float __gnu_parallel::_Settings::partial_sum_dilation"

.PP
Ratio for partial_sum\&. Assume 'sum and write result' to be this factor slower than just 'sum'\&. 
.PP
Definition at line 202 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_partial_sum_linear()\&.
.SS "unsigned int __gnu_parallel::_Settings::partial_sum_minimal_n"

.PP
Minimal input size for partial_sum\&. 
.PP
Definition at line 205 of file settings\&.h\&.
.SS "double __gnu_parallel::_Settings::partition_chunk_share"

.PP
Chunk size for partition, relative to input size\&. If > 0\&.0, this value overrides partition_chunk_size\&. 
.PP
Definition at line 192 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_partition()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::partition_chunk_size"

.PP
Chunk size for partition\&. 
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Definition at line 188 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_partition()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::partition_minimal_n"

.PP
Minimal input size for partition\&. 
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Definition at line 195 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_nth_element()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::qsb_steals"

.PP
The number of stolen ranges in load-balanced quicksort\&. 
.PP
Definition at line 265 of file settings\&.h\&.
.SS "unsigned int __gnu_parallel::_Settings::random_shuffle_minimal_n"

.PP
Minimal input size for random_shuffle\&. 
.PP
Definition at line 208 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::replace_minimal_n"

.PP
Minimal input size for replace and replace_if\&. 
.PP
Definition at line 211 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::set_difference_minimal_n"

.PP
Minimal input size for set_difference\&. 
.PP
Definition at line 214 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::set_intersection_minimal_n"

.PP
Minimal input size for set_intersection\&. 
.PP
Definition at line 217 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::set_symmetric_difference_minimal_n"

.PP
Minimal input size for set_symmetric_difference\&. 
.PP
Definition at line 220 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::set_union_minimal_n"

.PP
Minimal input size for set_union\&. 
.PP
Definition at line 223 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::sort_minimal_n"

.PP
Minimal input size for parallel sorting\&. 
.PP
Definition at line 226 of file settings\&.h\&.
.SS "unsigned int __gnu_parallel::_Settings::sort_mwms_oversampling"

.PP
Oversampling factor for parallel std::sort (MWMS)\&. 
.PP
Definition at line 229 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_sort_mwms(), and __gnu_parallel::parallel_sort_mwms_pu()\&.
.SS "unsigned int __gnu_parallel::_Settings::sort_qs_num_samples_preset"

.PP
Such many samples to take to find a good pivot (quicksort)\&. 
.PP
Definition at line 232 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::sort_qsb_base_case_maximal_n"

.PP
Maximal subsequence length to switch to unbalanced base case\&. Applies to std::sort with dynamically load-balanced quicksort\&. 
.PP
Definition at line 236 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::qsb_local_sort_with_helping()\&.
.SS "unsigned int __gnu_parallel::_Settings::TLB_size"

.PP
Size of the Translation Lookaside Buffer (underestimation)\&. 
.PP
Definition at line 255 of file settings\&.h\&.
.PP
Referenced by __gnu_parallel::parallel_random_shuffle_drs(), and __gnu_parallel::sequential_random_shuffle()\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::transform_minimal_n"

.PP
Minimal input size for parallel std::transform\&. 
.PP
Definition at line 239 of file settings\&.h\&.
.SS "\fBsequence_index_t\fP __gnu_parallel::_Settings::unique_copy_minimal_n"

.PP
Minimal input size for unique_copy\&. 
.PP
Definition at line 242 of file settings\&.h\&.

.SH "Author"
.PP 
Generated automatically by Doxygen for libstdc++ from the source code\&.