1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #include<queue> |
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20 | #include<cmath> |
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21 | #include<lemon/smart_graph.h> |
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22 | #include"bench_tools.h" |
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23 | |
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24 | using namespace std; |
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25 | using namespace lemon; |
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26 | |
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27 | inline int numOfOnes(int n,int dim) |
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28 | { |
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29 | int s=0; |
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30 | for(int i=0;i<dim;i++) { |
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31 | s+=n%2; |
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32 | n>>=1; |
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33 | } |
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34 | return s; |
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35 | } |
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36 | |
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37 | inline int numOfZeros(int n,int dim) |
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38 | { |
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39 | int s=dim; |
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40 | for(int i=0;i<dim;i++) { |
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41 | s-=n&1; |
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42 | n>>=1; |
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43 | } |
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44 | return s; |
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45 | } |
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46 | |
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47 | template<class Graph> |
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48 | void bfsStlQueue(Graph &G,typename Graph::Node source) |
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49 | { |
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50 | GRAPH_TYPEDEFS(typename Graph); |
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51 | |
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52 | using namespace std; |
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53 | |
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54 | typename Graph::template NodeMap<bool> visited(G,false); |
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55 | |
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56 | queue<typename Graph::Node> Q; |
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57 | |
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58 | Q.push(source); |
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59 | visited[source]=true; |
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60 | do { |
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61 | Node n(Q.front()); |
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62 | Node m; |
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63 | Q.pop(); |
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64 | for(OutEdgeIt e(G,n);e!=INVALID;++e) |
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65 | if(!visited[m=G.target(e)]) { |
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66 | Q.push(m); |
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67 | visited.set(m,true); |
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68 | } |
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69 | } while(!Q.empty()); |
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70 | } |
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71 | |
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72 | template<class Graph> |
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73 | void bfsOwnQueue(Graph &G,typename Graph::Node source) |
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74 | { |
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75 | GRAPH_TYPEDEFS(typename Graph); |
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76 | |
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77 | using namespace std; |
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78 | |
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79 | typename Graph::template NodeMap<bool> visited(G,false); |
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80 | |
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81 | int N=G.nodeNum(); |
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82 | vector<typename Graph::Node> Q(N); |
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83 | int Qh=0; |
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84 | int Qt=0; |
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85 | |
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86 | |
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87 | Q[Qh++]=source; |
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88 | visited.set(source,true); |
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89 | do { |
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90 | Node m; |
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91 | Node n=Q[Qt++]; |
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92 | for(OutEdgeIt e(G,n);e!=INVALID;++e) |
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93 | if(!visited[m=G.target(e)]) { |
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94 | Q[Qh++]=m; |
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95 | visited.set(m,true); |
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96 | } |
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97 | } while(Qt!=Qh); |
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98 | } |
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99 | |
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100 | template<class Graph> |
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101 | void iteratorBench(Graph &G) |
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102 | { |
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103 | GRAPH_TYPEDEFS(typename Graph); |
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104 | |
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105 | int i=0; |
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106 | |
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107 | for(NodeIt n(G);n!=INVALID;++n) |
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108 | for(OutEdgeIt e(G,n);e!=INVALID;++e) |
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109 | i++; |
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110 | } |
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111 | |
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112 | int main(int argc, char *argv[]) |
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113 | { |
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114 | typedef SmartGraph Graph; |
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115 | |
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116 | GRAPH_TYPEDEFS(Graph); |
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117 | |
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118 | Graph G; |
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119 | |
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120 | Timer T; |
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121 | |
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122 | if(argc!=3) { |
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123 | cout << "Usage: " << argv[0] << " dim mul\n"; |
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124 | return 1; |
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125 | } |
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126 | |
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127 | int dim=atoi(argv[1]); |
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128 | int mul=atoi(argv[2]); |
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129 | |
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130 | // cout << "Creating Hipercube ("<< (1<<dim) << " nodes, " |
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131 | // << dim*(1<<dim) << " edges):"; |
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132 | |
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133 | T.restart(); |
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134 | vector<Node> nodes; |
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135 | addBiDirHyperCube(G,dim,nodes); |
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136 | |
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137 | PrintTime("GENGRAPH",T); |
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138 | |
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139 | T.restart(); |
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140 | { |
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141 | for(int i=0;i<mul;i++) |
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142 | bfsStlQueue(G,nodes[0]); |
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143 | } |
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144 | PrintTime("BFS-STL",T); |
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145 | T.restart(); |
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146 | { |
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147 | for(int i=0;i<mul;i++) |
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148 | bfsOwnQueue(G,nodes[0]); |
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149 | } |
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150 | PrintTime("BFS-OWN",T); |
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151 | T.restart(); |
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152 | { |
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153 | for(int i=0;i<mul;i++) |
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154 | iteratorBench(G); |
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155 | } |
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156 | PrintTime("ITERATE",T); |
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157 | |
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158 | |
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159 | } |
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