1 | /* |
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2 | * |
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3 | * ********************************************************************* |
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4 | * (C) COPYRIGHT 1995 UNIVERSITY OF CHICAGO |
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5 | * ********************************************************************* |
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6 | * |
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7 | * This software was authored by |
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8 | * |
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9 | * D. Levine |
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10 | * Mathematics and Computer Science Division Argonne National Laboratory |
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11 | * Argonne IL 60439 |
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12 | * levine@mcs.anl.gov |
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13 | * (708) 252-6735 |
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14 | * (708) 252-5986 (FAX) |
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15 | * |
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16 | * with programming assistance of participants in Argonne National |
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17 | * Laboratory's SERS program. |
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18 | * |
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19 | * This program contains material protectable under copyright laws of the |
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20 | * United States. Permission is hereby granted to use it, reproduce it, |
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21 | * to translate it into another language, and to redistribute it to |
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22 | * others at no charge except a fee for transferring a copy, provided |
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23 | * that you conspicuously and appropriately publish on each copy the |
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24 | * University of Chicago's copyright notice, and the disclaimer of |
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25 | * warranty and Government license included below. Further, permission |
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26 | * is hereby granted, subject to the same provisions, to modify a copy or |
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27 | * copies or any portion of it, and to distribute to others at no charge |
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28 | * materials containing or derived from the material. |
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29 | * |
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30 | * The developers of the software ask that you acknowledge its use in any |
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31 | * document referencing work based on the program, such as published |
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32 | * research. Also, they ask that you supply to Argonne National |
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33 | * Laboratory a copy of any published research referencing work based on |
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34 | * the software. |
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35 | * |
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36 | * Any entity desiring permission for further use must contact: |
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37 | * |
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38 | * J. Gleeson |
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39 | * Industrial Technology Development Center Argonne National Laboratory |
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40 | * Argonne IL 60439 |
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41 | * gleesonj@smtplink.eid.anl.gov |
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42 | * (708) 252-6055 |
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43 | * |
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44 | * ******************************************************************** |
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45 | * DISCLAIMER |
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46 | * |
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47 | * THIS PROGRAM WAS PREPARED AS AN ACCOUNT OF WORK SPONSORED BY AN AGENCY |
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48 | * OF THE UNITED STATES GOVERNMENT. NEITHER THE UNIVERSITY OF CHICAGO, |
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49 | * THE UNITED STATES GOVERNMENT NOR ANY OF THEIR EMPLOYEES MAKE ANY |
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50 | * WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL LIABILITY OR |
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51 | * RESPONSIBILITY FOR THE ACCURACY, COMPLETENESS, OR USEFULNESS OF ANY |
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52 | * INFORMATION OR PROCESS DISCLOSED, OR REPRESENTS THAT ITS USE WOULD NOT |
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53 | * INFRINGE PRIVATELY OWNED RIGHTS. |
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54 | * |
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55 | * ********************************************************************** |
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56 | * GOVERNMENT LICENSE |
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57 | * |
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58 | * The Government is granted for itself and others acting on its behalf a |
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59 | * paid-up, non-exclusive, irrevocable worldwide license in this computer |
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60 | * software to reproduce, prepare derivative works, and perform publicly |
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61 | * and display publicly. |
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62 | */ |
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63 | |
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64 | /****************************************************************************** |
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65 | * FILE: parallel.c: This file contains all the parallel functions |
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66 | * Authors: David M. Levine, Philip L. Hallstrom, David M. Noelle, |
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67 | * Brian P. Walenz |
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68 | ******************************************************************************/ |
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69 | |
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70 | #include "pgapack.h" |
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71 | #include <setjmp.h> |
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72 | |
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73 | extern jmp_buf pgapack_jmpbuf; |
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74 | extern int *pgapack_abortPtr; |
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75 | |
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76 | #define DEBUG_EVAL 0 |
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77 | |
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78 | /*U**************************************************************************** |
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79 | PGARunGM - High-level routine to execute the genetic algorithm using the |
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80 | global model. It is called after PGACreate and PGASetup have been called. |
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81 | If a NULL communicator is given, a sequential execution method is used, |
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82 | otherwise, work is divided among the processors in the communicator. |
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83 | |
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84 | Category: Generation |
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85 | |
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86 | Inputs: |
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87 | ctx - context variable |
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88 | evaluate - a pointer to the user's evaluation function, which must |
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89 | have the calling sequence shown in the example. |
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90 | comm - an MPI communicator |
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91 | |
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92 | Outputs: |
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93 | none |
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94 | |
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95 | Example: |
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96 | PGAContext *ctx; |
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97 | double f(PGAContext *ctx, int p, int pop); |
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98 | : |
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99 | PGARunGM(ctx, f, MPI_COMM_WORLD); |
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100 | |
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101 | ****************************************************************************U*/ |
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102 | void PGARunGM(PGAContext *ctx, double (*f)(PGAContext *, int, int), |
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103 | MPI_Comm comm) |
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104 | { |
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105 | int rank, Restarted, best_p; |
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106 | void (*CreateNewGeneration)(PGAContext *, int, int); |
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107 | |
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108 | /* Let this be warned: |
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109 | * The communicator is NOT duplicated. There might be problems with |
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110 | * PGAPack and the user program using the same communicator. |
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111 | */ |
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112 | PGADebugEntered("PGARunGM"); |
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113 | |
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114 | rank = PGAGetRank(ctx, comm); |
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115 | |
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116 | PGAEvaluate(ctx, PGA_OLDPOP, f, comm); |
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117 | |
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118 | if (rank == 0) |
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119 | PGAFitness(ctx, PGA_OLDPOP); |
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120 | |
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121 | if (PGAGetMutationOrCrossoverFlag(ctx)) |
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122 | CreateNewGeneration = PGARunMutationOrCrossover; |
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123 | else |
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124 | CreateNewGeneration = PGARunMutationAndCrossover; |
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125 | |
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126 | while (!PGADone(ctx, comm)) { |
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127 | if (rank == 0) { |
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128 | Restarted = PGA_FALSE; |
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129 | if ((ctx->ga.restart == PGA_TRUE) && |
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130 | (ctx->ga.ItersOfSame % ctx->ga.restartFreq == 0)) { |
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131 | ctx->ga.ItersOfSame++; |
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132 | Restarted = PGA_TRUE; |
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133 | PGARestart(ctx, PGA_OLDPOP, PGA_NEWPOP); |
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134 | } else { |
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135 | PGASelect(ctx, PGA_OLDPOP); |
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136 | CreateNewGeneration(ctx, PGA_OLDPOP, PGA_NEWPOP); |
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137 | } |
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138 | } |
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139 | MPI_Bcast(&Restarted, 1, MPI_INT, 0, comm); |
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140 | |
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141 | PGAEvaluate(ctx, PGA_NEWPOP, f, comm); |
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142 | if (rank == 0) |
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143 | PGAFitness(ctx, PGA_NEWPOP); |
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144 | |
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145 | /* If the GA wasn't restarted, update the generation and print |
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146 | * stuff. We do this because a restart is NOT counted as a |
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147 | * complete generation. |
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148 | */ |
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149 | if (!Restarted) { |
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150 | PGAUpdateGeneration(ctx, comm); |
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151 | if (rank == 0) |
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152 | PGAPrintReport(ctx, stdout, PGA_OLDPOP); |
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153 | } |
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154 | } |
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155 | |
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156 | if (rank == 0) { |
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157 | best_p = PGAGetBestIndex(ctx, PGA_OLDPOP); |
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158 | printf("The Best Evaluation: %e.\n", |
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159 | PGAGetEvaluation(ctx, best_p, PGA_OLDPOP)); |
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160 | printf("The Best String:\n"); |
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161 | PGAPrintString(ctx, stdout, best_p, PGA_OLDPOP); |
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162 | fflush(stdout); |
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163 | } |
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164 | PGADebugExited("PGARunGM"); |
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165 | } |
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166 | |
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167 | |
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168 | /*I**************************************************************************** |
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169 | PGAEvaluateSeq - Internal evalution function. Evaluates all strings |
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170 | that need to be evaluated using one processor. |
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171 | |
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172 | Category: Fitness & Evaluation |
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173 | |
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174 | Inputs: |
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175 | ctx - context variable |
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176 | pop - symbolic constant of the population to be evaluated |
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177 | f - a pointer to a function to evaluate a string. |
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178 | |
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179 | Outputs: |
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180 | |
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181 | Example: |
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182 | |
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183 | ****************************************************************************I*/ |
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184 | void PGAEvaluateSeq(PGAContext *ctx, int pop, |
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185 | double (*f)(PGAContext *, int, int)) |
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186 | { |
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187 | int p; |
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188 | double e; |
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189 | |
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190 | PGADebugEntered("PGAEvaluateSeq"); |
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191 | |
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192 | /* Standard sequential evaluation. */ |
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193 | if (ctx->sys.UserFortran == PGA_TRUE) { |
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194 | for (p=1; p<=ctx->ga.PopSize; p++) |
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195 | if (!PGAGetEvaluationUpToDateFlag(ctx, p-1, pop)) { |
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196 | e = (*((double(*)(void *, void *, void *))f))(&ctx, &p, &pop); |
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197 | PGASetEvaluation (ctx, p-1, pop, e); |
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198 | } |
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199 | } else { |
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200 | for (p=0; p<ctx->ga.PopSize; p++) { |
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201 | if ((pgapack_abortPtr != NULL) && (*pgapack_abortPtr == 1)) { |
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202 | longjmp(pgapack_jmpbuf, 1); |
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203 | } |
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204 | if (!PGAGetEvaluationUpToDateFlag(ctx, p, pop)) { |
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205 | e = (*f)(ctx, p, pop); |
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206 | PGASetEvaluation(ctx, p, pop, e); |
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207 | } |
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208 | } |
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209 | } |
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210 | PGADebugExited("PGAEvaluateSeq"); |
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211 | } |
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212 | |
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213 | |
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214 | /*I**************************************************************************** |
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215 | PGAEvaluateCoop - Internal evaluation function. Evaluates all strings |
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216 | that need to be evaluated using two processors cooperatively. The first |
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217 | is treated as a master, it will send a string to the second for evaluation. |
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218 | While the second is evaluating, the master will _also_ evaluate a string. |
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219 | |
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220 | Category: Fitness & Evaluation |
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221 | |
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222 | Inputs: |
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223 | ctx - context variable |
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224 | pop - symbolic constant of the population to be evaluated |
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225 | f - a pointer to a function to evaluate a string. |
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226 | comm - an MPI communicator |
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227 | |
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228 | Outputs: |
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229 | |
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230 | Example: |
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231 | |
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232 | ****************************************************************************I*/ |
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233 | void PGAEvaluateCoop(PGAContext *ctx, int pop, |
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234 | double (*f)(PGAContext *, int, int), MPI_Comm comm) |
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235 | { |
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236 | MPI_Status stat; |
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237 | int p, fp, q; |
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238 | double e; |
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239 | PGAIndividual *ind; |
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240 | |
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241 | PGADebugEntered("PGAEvaluateCoop"); |
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242 | |
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243 | q = -1; |
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244 | |
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245 | ind = PGAGetIndividual(ctx, 0, pop); |
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246 | |
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247 | for (p=0; p<ctx->ga.PopSize;) { |
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248 | while ((p<ctx->ga.PopSize) && (ind+p)->evaluptodate) p++; |
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249 | if (p<ctx->ga.PopSize) { |
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250 | PGASendIndividual(ctx, p, pop, 1, PGA_COMM_STRINGTOEVAL, comm); |
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251 | q = p; |
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252 | } |
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253 | p++; |
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254 | |
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255 | while ((p<ctx->ga.PopSize) && (ind+p)->evaluptodate) p++; |
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256 | if (p<ctx->ga.PopSize) { |
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257 | if (ctx->sys.UserFortran == PGA_TRUE) { |
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258 | fp = p+1; |
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259 | e = (*((double(*)(void *, void *, void *))f))(&ctx, &fp, &pop); |
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260 | } else { |
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261 | e = (*f)(ctx, p, pop); |
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262 | } |
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263 | PGASetEvaluation(ctx, p, pop, e); |
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264 | #if DEBUG_EVAL |
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265 | printf("%4d: %10.8e Local\n", p, e); fflush(stdout); |
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266 | #endif |
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267 | } |
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268 | |
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269 | if (q >= 0) { |
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270 | MPI_Recv(&e, 1, MPI_DOUBLE, 1, PGA_COMM_EVALOFSTRING, comm, &stat); |
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271 | PGASetEvaluation(ctx, q, pop, e); |
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272 | #if DEBUG_EVAL |
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273 | printf("%4d: %10.8e Slave %d\n", p, e, 1); fflush(stdout); |
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274 | #endif |
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275 | q = -1; |
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276 | } |
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277 | } |
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278 | |
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279 | /* Release the slave */ |
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280 | MPI_Send(&q, 1, MPI_INT, 1, PGA_COMM_DONEWITHEVALS, comm); |
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281 | |
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282 | PGADebugExited("PGAEvaluateCoop"); |
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283 | } |
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284 | |
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285 | |
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286 | |
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287 | /*I**************************************************************************** |
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288 | PGAEvaluateMS - Internal evaluation function. Evaluates all strings |
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289 | that need evaluating using three or more processors. Operates in a |
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290 | standard master-slave execution method. |
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291 | |
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292 | Category: Fitness & Evaluation |
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293 | |
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294 | Inputs: |
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295 | ctx - context variable |
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296 | pop - symbolic constant of the population to be evaluated |
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297 | f - a pointer to a function to evaluate a string. |
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298 | comm - an MPI communicator |
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299 | |
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300 | Outputs: |
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301 | |
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302 | Example: |
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303 | |
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304 | ****************************************************************************I*/ |
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305 | void PGAEvaluateMS(PGAContext *ctx, int pop, |
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306 | double (*f)(PGAContext *c, int p, int pop), MPI_Comm comm) |
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307 | { |
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308 | int *work; |
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309 | int i, k, s, p, size, sentout; |
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310 | double e; |
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311 | MPI_Status stat; |
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312 | PGAIndividual *ind; |
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313 | |
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314 | PGADebugEntered("PGAEvaluateMS"); |
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315 | |
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316 | size = PGAGetNumProcs(ctx, comm); |
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317 | |
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318 | work = (int *)malloc(size *sizeof(int)); |
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319 | if (work == NULL) { |
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320 | PGAError(ctx, "PGAEvaluateMS: Couldn't allocate work array", |
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321 | PGA_FATAL, PGA_VOID, NULL); |
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322 | } |
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323 | |
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324 | sentout = 0; |
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325 | s = 1; |
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326 | ind = PGAGetIndividual(ctx, 0, pop); |
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327 | |
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328 | /* Send strings to all processes, since they are all unused. */ |
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329 | for (k=0; ((k<ctx->ga.PopSize) && (s<size)); k++) { |
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330 | if ((ind+k)->evaluptodate == PGA_FALSE) { |
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331 | work[s] = k; |
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332 | PGASendIndividual(ctx, k, pop, s, PGA_COMM_STRINGTOEVAL, comm); |
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333 | #if DEBUG_EVAL |
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334 | printf("%4d: Sent to slave %d.\n", k, s); fflush(stdout); |
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335 | #endif |
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336 | sentout++; |
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337 | s++; |
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338 | } |
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339 | } |
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340 | |
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341 | /* Move to the next string to be evaluated. Notice that all we need |
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342 | * to do is skip any strings that are already evaluated, unlike |
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343 | * below, where we need to _first_ go to the next string, then |
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344 | * skip any that are up to date. |
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345 | */ |
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346 | while ((k<ctx->ga.PopSize) && (ind+k)->evaluptodate) k++; |
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347 | |
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348 | /* While there are still unevaluated individuals, receive whatever |
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349 | * is waiting, then immediately send a new string to it. This |
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350 | * implicitly will balance the load across the machines, as we |
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351 | * initially sent a string to _each_ process, so _each_ process |
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352 | * will return an evaluation and get a new one immediately. |
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353 | */ |
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354 | while(k<ctx->ga.PopSize) { |
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355 | /* Receive the next evaluated string. */ |
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356 | MPI_Recv(&e, 1, MPI_DOUBLE, MPI_ANY_SOURCE, PGA_COMM_EVALOFSTRING, |
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357 | comm, &stat); |
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358 | p = work[stat.MPI_SOURCE]; |
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359 | PGASetEvaluation(ctx, p, pop, e); |
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360 | |
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361 | #if DEBUG_EVAL |
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362 | printf("%4d: %10.8e Slave %d Sent %d\n", work[stat.MPI_SOURCE], |
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363 | e, stat.MPI_SOURCE, k); fflush(stdout); |
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364 | #endif |
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365 | |
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366 | /* Immediately send another string to be evaluated. */ |
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367 | work[stat.MPI_SOURCE] = k; |
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368 | PGASendIndividual(ctx, k, pop, stat.MPI_SOURCE, |
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369 | PGA_COMM_STRINGTOEVAL, comm); |
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370 | |
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371 | /* Find the next unevaluated individual */ |
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372 | k++; |
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373 | while ((k<ctx->ga.PopSize) && (ind+k)->evaluptodate) k++; |
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374 | } |
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375 | |
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376 | /* All strings have been sent out. Wait for them to be done. */ |
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377 | while(sentout > 0) { |
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378 | MPI_Recv(&e, 1, MPI_DOUBLE, MPI_ANY_SOURCE, PGA_COMM_EVALOFSTRING, |
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379 | comm, &stat); |
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380 | p = work[stat.MPI_SOURCE]; |
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381 | PGASetEvaluation(ctx, p, pop, e); |
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382 | sentout--; |
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383 | #if DEBUG_EVAL |
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384 | printf("%4d: %10.8e Slave %d\n", |
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385 | work[stat.MPI_SOURCE], e, stat.MPI_SOURCE); fflush(stdout); |
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386 | #endif |
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387 | } |
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388 | free(work); |
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389 | |
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390 | /* Release the slaves. */ |
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391 | for (i=1; i<size; i++) |
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392 | MPI_Send(&i, 1, MPI_INT, i, PGA_COMM_DONEWITHEVALS, comm); |
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393 | |
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394 | PGADebugExited("PGAEvaluateMS"); |
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395 | } |
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396 | |
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397 | |
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398 | /*I**************************************************************************** |
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399 | PGAEvaluateSlave - Slave execution routine. Sit around and wait for a |
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400 | string to eval to show up, then evaluate it and return the evaluation. |
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401 | Terminates when it receives PGA_COMM_DONEWITHEVALS. |
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402 | |
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403 | Category: Fitness & Evaluation |
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404 | |
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405 | Inputs: |
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406 | |
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407 | Outputs: |
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408 | |
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409 | Example: |
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410 | |
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411 | ****************************************************************************I*/ |
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412 | void PGAEvaluateSlave(PGAContext *ctx, int pop, |
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413 | double (*f)(PGAContext *, int, int), MPI_Comm comm) |
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414 | { |
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415 | MPI_Status stat; |
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416 | int k; |
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417 | double e; |
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418 | |
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419 | PGADebugEntered("PGAEvaluateSlave"); |
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420 | |
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421 | k = PGA_TEMP1; |
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422 | MPI_Probe(0, MPI_ANY_TAG, comm, &stat); |
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423 | while (stat.MPI_TAG == PGA_COMM_STRINGTOEVAL) { |
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424 | PGAReceiveIndividual(ctx, PGA_TEMP1, pop, 0, PGA_COMM_STRINGTOEVAL, |
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425 | comm, &stat); |
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426 | |
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427 | if (ctx->sys.UserFortran == PGA_TRUE) |
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428 | e = (*((double(*)(void *, void *, void *))f))(&ctx, &k, &pop); |
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429 | else |
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430 | e = (*f)(ctx, PGA_TEMP1, pop); |
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431 | |
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432 | MPI_Send(&e, 1, MPI_DOUBLE, 0, PGA_COMM_EVALOFSTRING, comm); |
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433 | MPI_Probe(0, MPI_ANY_TAG, comm, &stat); |
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434 | } |
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435 | MPI_Recv(&k, 1, MPI_INT, 0, PGA_COMM_DONEWITHEVALS, comm, &stat); |
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436 | |
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437 | PGADebugExited("PGAEvaluateSlave"); |
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438 | } |
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439 | |
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440 | |
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441 | /*U**************************************************************************** |
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442 | PGAEvaluate - Calls a user-specified function to return an evaluation of |
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443 | each string in the population. The user-specified function is only called |
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444 | if the string has been changed (e.g., by crossover or mutation) or the user |
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445 | has explicitly signaled the string's evaluation is out-of-date by a call |
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446 | to PGASetEvaluationUpToDateFlag(). |
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447 | |
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448 | Category: Fitness & Evaluation |
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449 | |
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450 | Inputs: |
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451 | ctx - context variable |
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452 | pop - symbolic constant of the population to be evaluated |
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453 | f - a pointer to a function to evaluate a string. This function will |
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454 | be called once for each string in population pop that requires |
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455 | evaluation. This function must return a double (the evaluation |
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456 | function value) and must fit the prototype |
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457 | double f(PGAContext *c, int p, int pop); |
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458 | comm - an MPI communicator |
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459 | |
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460 | Outputs: |
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461 | Evaluates the population via side effect |
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462 | |
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463 | Example: |
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464 | Evaluate all strings in population PGA_NEWPOP using the user-defined |
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465 | evaluation function Energy. |
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466 | |
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467 | double Energy(PGAContext *ctx, int p, int pop) { |
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468 | : |
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469 | }; |
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470 | |
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471 | PGAContext *ctx; |
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472 | : |
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473 | PGAEvaluate(ctx, PGA_NEWPOP, Energy, MPI_COMM_WORLD); |
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474 | |
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475 | ****************************************************************************U*/ |
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476 | void PGAEvaluate(PGAContext *ctx, int pop, |
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477 | double (*f)(PGAContext *, int, int), MPI_Comm comm) |
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478 | { |
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479 | int rank, size; |
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480 | |
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481 | PGADebugEntered("PGAEvaluate"); |
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482 | |
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483 | rank = PGAGetRank(ctx, comm); |
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484 | size = PGAGetNumProcs(ctx, comm); |
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485 | |
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486 | if (rank == 0) { |
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487 | if (size == 1) |
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488 | PGAEvaluateSeq(ctx, pop, f); |
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489 | if (size == 2) |
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490 | PGAEvaluateCoop(ctx, pop, f, comm); |
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491 | if (size > 2) |
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492 | PGAEvaluateMS(ctx, pop, f, comm); |
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493 | } else { |
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494 | PGAEvaluateSlave(ctx, pop, f, comm); |
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495 | } |
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496 | PGADebugExited("PGAEvaluate"); |
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497 | } |
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498 | |
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499 | |
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500 | /*U**************************************************************************** |
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501 | PGABuildDatatype - Build an MPI datatype for string p in population pop. |
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502 | |
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503 | Category: Parallel |
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504 | |
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505 | Inputs: |
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506 | ctx - context variable |
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507 | p - index of an individual |
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508 | pop - symbolic constant of the population |
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509 | |
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510 | Outputs: |
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511 | An MPI datatype for member p of population pop. |
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512 | |
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513 | Example: |
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514 | PGAContext *ctx; |
---|
515 | int p; |
---|
516 | MPI_Datatype dt; |
---|
517 | : |
---|
518 | dt = PGABuildDatatype(ctx, p, PGA_NEWPOP); |
---|
519 | |
---|
520 | ****************************************************************************U*/ |
---|
521 | MPI_Datatype PGABuildDatatype(PGAContext *ctx, int p, int pop) |
---|
522 | { |
---|
523 | PGADebugEntered("PGABuildDatatype"); |
---|
524 | |
---|
525 | PGADebugExited("PGABuildDatatype"); |
---|
526 | |
---|
527 | return((*ctx->cops.BuildDatatype)(ctx, p, pop)); |
---|
528 | } |
---|
529 | |
---|
530 | |
---|
531 | /*U**************************************************************************** |
---|
532 | PGASendIndividual - transmit an individual to another process |
---|
533 | |
---|
534 | Category: Parallel |
---|
535 | |
---|
536 | Inputs: |
---|
537 | ctx - context variable |
---|
538 | p - index of an individual |
---|
539 | pop - symbolic constant of the population |
---|
540 | dest - ID of the process where this is going |
---|
541 | tag - MPI tag to send with the individual |
---|
542 | comm - MPI communicator |
---|
543 | |
---|
544 | Outputs: |
---|
545 | |
---|
546 | Example: |
---|
547 | PGAContext *ctx; |
---|
548 | int p, dest; |
---|
549 | : |
---|
550 | dest = SelectAFreeProcessor(); |
---|
551 | PGASendIndividual(ctx, p, PGA_NEWPOP, dest, PGA_SR_STRINGTOEVAL, comm); |
---|
552 | |
---|
553 | ****************************************************************************U*/ |
---|
554 | void PGASendIndividual(PGAContext *ctx, int p, int pop, int dest, int tag, |
---|
555 | MPI_Comm comm) |
---|
556 | { |
---|
557 | MPI_Datatype individualtype; |
---|
558 | |
---|
559 | PGADebugEntered("PGASendIndividual"); |
---|
560 | |
---|
561 | individualtype = PGABuildDatatype(ctx, p, pop); |
---|
562 | MPI_Send(MPI_BOTTOM, 1, individualtype, dest, tag, comm); |
---|
563 | MPI_Type_free(&individualtype); |
---|
564 | |
---|
565 | PGADebugExited("PGASendIndividual"); |
---|
566 | } |
---|
567 | |
---|
568 | /*U**************************************************************************** |
---|
569 | PGAReceiveIndividual - receive an individual from another process |
---|
570 | |
---|
571 | Category: Parallel |
---|
572 | |
---|
573 | Inputs: |
---|
574 | ctx - contex variable |
---|
575 | p - index of an individual |
---|
576 | pop - symbolic constant of the population |
---|
577 | source - ID of the process from which to receive |
---|
578 | tag - MPI tag to look for |
---|
579 | status - pointer to an MPI status structure |
---|
580 | |
---|
581 | Outputs: |
---|
582 | status and string p in population pop are changed by side-effect. |
---|
583 | |
---|
584 | Example: |
---|
585 | Receive a string from the master process (rank == 0) with tag |
---|
586 | PGA_SR_STRINGTOEVAL, and place it into the first temporary location |
---|
587 | in PGA_NEWPOP. |
---|
588 | |
---|
589 | PGAContext *ctx; |
---|
590 | MPI_Comm comm; |
---|
591 | MPI_Status status; |
---|
592 | : |
---|
593 | PGAReceiveIndividual(ctx, PGA_TEMP1, PGA_NEWPOP, 0, PGA_SR_STRINGTOEVAL, |
---|
594 | comm, &status); |
---|
595 | |
---|
596 | ****************************************************************************U*/ |
---|
597 | void PGAReceiveIndividual(PGAContext *ctx, int p, int pop, int source, int tag, |
---|
598 | MPI_Comm comm, MPI_Status *status) |
---|
599 | { |
---|
600 | MPI_Datatype individualtype; |
---|
601 | |
---|
602 | PGADebugEntered("PGAReceiveIndividual"); |
---|
603 | |
---|
604 | individualtype = PGABuildDatatype(ctx, p, pop); |
---|
605 | MPI_Recv(MPI_BOTTOM, 1, individualtype, source, tag, comm, status); |
---|
606 | MPI_Type_free(&individualtype); |
---|
607 | |
---|
608 | PGADebugExited("PGAReceiveIndividual"); |
---|
609 | } |
---|
610 | |
---|
611 | /*U**************************************************************************** |
---|
612 | PGASendReceiveIndividual - Send an individual to a process, while receiving |
---|
613 | a different individual from a different process. |
---|
614 | |
---|
615 | Category: Parallel |
---|
616 | |
---|
617 | Inputs: |
---|
618 | ctx - context variable |
---|
619 | send_p - index of string to send |
---|
620 | send_pop - symbolic constant of population to send from |
---|
621 | dest - destination process |
---|
622 | send_tag - tag to send with |
---|
623 | recv_p - index of string to receive |
---|
624 | recv_pop - symbolic constant of population to receive from |
---|
625 | source - process to receive from |
---|
626 | recv_tag - tag to receive with |
---|
627 | comm - an MPI communicator |
---|
628 | status - pointer to the MPI status structure |
---|
629 | |
---|
630 | Outputs: |
---|
631 | status and string recv_p in population recv_pop are modified by |
---|
632 | side-effect. |
---|
633 | |
---|
634 | Example: |
---|
635 | A dedicated process is being used to perform an optimization algorithm |
---|
636 | on the strings. Send a new string, s, to the process, while receiving an |
---|
637 | optimized string, r, from it. |
---|
638 | |
---|
639 | PGAContext *ctx; |
---|
640 | MPI_Comm comm; |
---|
641 | MPI_Status status; |
---|
642 | int s, r; |
---|
643 | : |
---|
644 | PGASendReceiveIndividual(ctx, s, PGA_NEWPOP, 1, PGA_SR_STRINGTOMODIFY, |
---|
645 | r, PGA_NEWPOP, 1, PGA_SR_MODIFIEDSTRING, |
---|
646 | comm, &status); |
---|
647 | |
---|
648 | ****************************************************************************U*/ |
---|
649 | void PGASendReceiveIndividual(PGAContext *ctx, int send_p, int send_pop, |
---|
650 | int dest, int send_tag, int recv_p, int recv_pop, |
---|
651 | int source, int recv_tag, MPI_Comm comm, |
---|
652 | MPI_Status *status) |
---|
653 | { |
---|
654 | MPI_Datatype individualsendtype; |
---|
655 | MPI_Datatype individualrecvtype; |
---|
656 | |
---|
657 | PGADebugEntered("PGASendReceiveIndividual"); |
---|
658 | |
---|
659 | individualsendtype = PGABuildDatatype(ctx, send_p, send_pop); |
---|
660 | individualrecvtype = PGABuildDatatype(ctx, recv_p, recv_pop); |
---|
661 | |
---|
662 | MPI_Sendrecv(MPI_BOTTOM, 1, individualsendtype, dest, send_tag, |
---|
663 | MPI_BOTTOM, 1, individualrecvtype, source, recv_tag, |
---|
664 | comm, status); |
---|
665 | |
---|
666 | MPI_Type_free(&individualsendtype); |
---|
667 | MPI_Type_free(&individualrecvtype); |
---|
668 | |
---|
669 | PGADebugExited("PGASendReceiveIndividual"); |
---|
670 | } |
---|
671 | |
---|
672 | |
---|
673 | /*I**************************************************************************** |
---|
674 | PGARunIM - Execute the island model genetic algorithm |
---|
675 | |
---|
676 | Category: Parallel |
---|
677 | |
---|
678 | Inputs: |
---|
679 | ctx - context variable |
---|
680 | evaluate - a pointer to the user's evaluation function, which must |
---|
681 | have the calling sequence shown in the example. |
---|
682 | comm - the MPI communicator to use |
---|
683 | |
---|
684 | Outputs: |
---|
685 | none |
---|
686 | |
---|
687 | Example: |
---|
688 | PGAContext *ctx, |
---|
689 | double f(PGAContext *ctx, int p, int pop); |
---|
690 | MPI_Comm comm; |
---|
691 | : |
---|
692 | PGARunIM(ctx, f, comm); |
---|
693 | |
---|
694 | ****************************************************************************I*/ |
---|
695 | void PGARunIM(PGAContext *ctx, double (*f)(PGAContext *c, int p, int pop), |
---|
696 | MPI_Comm tcomm) |
---|
697 | { |
---|
698 | /* Based on ctx->par.topology this routine will need to create the |
---|
699 | appropriate communicator out of tcomm |
---|
700 | */ |
---|
701 | |
---|
702 | PGADebugEntered("PGARunIM"); |
---|
703 | PGAError (ctx, "PGARunIM: Island model not implemented", |
---|
704 | PGA_FATAL, PGA_VOID, NULL); |
---|
705 | PGADebugExited("PGARunIM"); |
---|
706 | } |
---|
707 | |
---|
708 | |
---|
709 | /*I**************************************************************************** |
---|
710 | PGARunNM - Execute a neighborhood model genetic algorithm |
---|
711 | |
---|
712 | Category: Parallel |
---|
713 | |
---|
714 | Inputs: |
---|
715 | ctx - context variable |
---|
716 | evaluate - a pointer to the user's evaluation function, which must |
---|
717 | have the calling sequence shown in the example. |
---|
718 | comm - the MPI communicator to use |
---|
719 | |
---|
720 | Outputs: |
---|
721 | none |
---|
722 | |
---|
723 | Example: |
---|
724 | PGAContext *ctx, |
---|
725 | MPI_Comm comm; |
---|
726 | double f(PGAContext *ctx, int p, int pop); |
---|
727 | : |
---|
728 | PGARunNM(ctx, f, comm); |
---|
729 | |
---|
730 | ****************************************************************************I*/ |
---|
731 | void PGARunNM(PGAContext *ctx, double (*f)(PGAContext *c, int p, int pop), |
---|
732 | MPI_Comm tcomm) |
---|
733 | { |
---|
734 | /* Based on ctx->par.topology this routine will need to create the |
---|
735 | appropriate communicator out of tcomm |
---|
736 | */ |
---|
737 | PGADebugEntered("PGARunNM"); |
---|
738 | PGAError (ctx, "PGARunNM: Island model not implemented", |
---|
739 | PGA_FATAL, PGA_VOID, NULL); |
---|
740 | PGADebugExited("PGARunNM"); |
---|
741 | } |
---|
742 | |
---|
743 | |
---|
744 | |
---|
745 | /*U**************************************************************************** |
---|
746 | PGAGetRank - Returns the rank of the processor in communicator comm. If |
---|
747 | comm is NULL or a sequential version of PGAPack is used, PGAGetRank() |
---|
748 | returns 0. |
---|
749 | |
---|
750 | Category: Parallel |
---|
751 | |
---|
752 | Inputs: |
---|
753 | ctx - context variable structure pointer |
---|
754 | comm - an MPI communicator |
---|
755 | |
---|
756 | Outputs: |
---|
757 | The rank of this processor |
---|
758 | |
---|
759 | Example: |
---|
760 | PGAContext *ctx; |
---|
761 | int rank; |
---|
762 | : |
---|
763 | rank = PGAGetRank(ctx, MPI_COMM_WORLD); |
---|
764 | if (rank == 0) { |
---|
765 | LetTheMasterDoSomething(); |
---|
766 | } |
---|
767 | |
---|
768 | ****************************************************************************U*/ |
---|
769 | int PGAGetRank (PGAContext *ctx, MPI_Comm comm) |
---|
770 | { |
---|
771 | int rank; |
---|
772 | |
---|
773 | PGADebugEntered("PGAGetRank"); |
---|
774 | |
---|
775 | if (comm == NULL) |
---|
776 | rank = 0; |
---|
777 | else |
---|
778 | MPI_Comm_rank(comm, &rank); |
---|
779 | |
---|
780 | PGADebugExited("PGAGetRank"); |
---|
781 | |
---|
782 | return(rank); |
---|
783 | } |
---|
784 | |
---|
785 | |
---|
786 | /*U**************************************************************************** |
---|
787 | PGAGetNumProcs - Returns the size of communicator comm in processes. If |
---|
788 | comm is NULL or a sequential version of PGAPack is used, PGAGetNumProcs() |
---|
789 | returns 1. |
---|
790 | |
---|
791 | Category: Parallel |
---|
792 | |
---|
793 | Inputs: |
---|
794 | ctx - context variable structure pointer |
---|
795 | comm - an MPI communicator |
---|
796 | |
---|
797 | Outputs: |
---|
798 | The numbers of processors in communicator comm. |
---|
799 | |
---|
800 | Example: |
---|
801 | PGAContext *ctx; |
---|
802 | : |
---|
803 | if (PGAGetNumProcs(ctx, MPI_COMM_WORLD) < 4) { |
---|
804 | printf("Too few processors for decent performance!\n"); |
---|
805 | exit(-1); |
---|
806 | } |
---|
807 | |
---|
808 | ****************************************************************************U*/ |
---|
809 | int PGAGetNumProcs (PGAContext *ctx, MPI_Comm comm) |
---|
810 | { |
---|
811 | int size; |
---|
812 | |
---|
813 | PGADebugEntered("PGAGetNumProcs"); |
---|
814 | |
---|
815 | if (comm == NULL) |
---|
816 | size = 1; |
---|
817 | else |
---|
818 | MPI_Comm_size(comm, &size); |
---|
819 | |
---|
820 | PGADebugExited("PGAGetNumProcs"); |
---|
821 | |
---|
822 | return(size); |
---|
823 | } |
---|
824 | |
---|
825 | |
---|
826 | /*I**************************************************************************** |
---|
827 | PGASetNumIslands - Set the number of islands to use in an island model |
---|
828 | GA. The default is one. Currently must be the same as the number of |
---|
829 | processes in the default communicator. |
---|
830 | |
---|
831 | Category: Parallel |
---|
832 | |
---|
833 | Inputs: |
---|
834 | ctx - context variable |
---|
835 | n - number of islands |
---|
836 | |
---|
837 | Outputs: |
---|
838 | None |
---|
839 | |
---|
840 | Example: |
---|
841 | PGAContext *ctx, |
---|
842 | double f(PGAContext *ctx, int p, int pop); |
---|
843 | : |
---|
844 | ctx = PGACreate(&argc, argv, PGA_DATATYPE_BINARY, 100, PGA_MAXIMIZE); |
---|
845 | PGASetNumIslands(ctx, 10); |
---|
846 | PGASetUp(ctx); |
---|
847 | PGARun(ctx, f); |
---|
848 | PGADestroy(ctx); |
---|
849 | |
---|
850 | ****************************************************************************I*/ |
---|
851 | void PGASetNumIslands( PGAContext *ctx, int n) |
---|
852 | { |
---|
853 | |
---|
854 | PGADebugEntered("PGASetNumIslands"); |
---|
855 | |
---|
856 | if ( n < 1 ) |
---|
857 | PGAError(ctx, "PGASetNumIslands: Invalid value of n:", |
---|
858 | PGA_FATAL, PGA_INT, (void *) &n); |
---|
859 | |
---|
860 | ctx->par.NumIslands = n; |
---|
861 | |
---|
862 | PGADebugExited("PGASetNumIslands"); |
---|
863 | } |
---|
864 | |
---|
865 | |
---|
866 | /*I*************************************************************************** |
---|
867 | PGAGetNumIslands - Returns the number of islands to use in an island model |
---|
868 | |
---|
869 | Category: Parallel |
---|
870 | |
---|
871 | Inputs: |
---|
872 | ctx - context variable |
---|
873 | |
---|
874 | Outputs: |
---|
875 | the number of islands to use in an island model |
---|
876 | |
---|
877 | Example: |
---|
878 | PGAContext *ctx; |
---|
879 | int npop; |
---|
880 | : |
---|
881 | npop = PGAGetNumIslands(ctx); |
---|
882 | |
---|
883 | ***************************************************************************I*/ |
---|
884 | int PGAGetNumIslands (PGAContext *ctx) |
---|
885 | { |
---|
886 | PGADebugEntered("PGAGetNumIslands"); |
---|
887 | PGAFailIfNotSetUp("PGAGetNumIslands"); |
---|
888 | |
---|
889 | PGADebugExited("PGAGetNumIslands"); |
---|
890 | |
---|
891 | return(ctx->par.NumIslands); |
---|
892 | } |
---|
893 | |
---|
894 | /*I**************************************************************************** |
---|
895 | PGASetNumDemes - Set the number of demes to use in a neighborhood model |
---|
896 | GA. Currently must be the same as the number of processes in the default |
---|
897 | communicator. The default is one. |
---|
898 | |
---|
899 | Category: Parallel |
---|
900 | |
---|
901 | Inputs: |
---|
902 | ctx - context variable |
---|
903 | numdemes - number of demes |
---|
904 | |
---|
905 | Outputs: |
---|
906 | None |
---|
907 | |
---|
908 | Example: |
---|
909 | PGAContext *ctx, |
---|
910 | double f(PGAContext *ctx, int p, int pop); |
---|
911 | : |
---|
912 | ctx = PGACreate(&argc, argv, PGA_DATATYPE_BINARY, 100, PGA_MAXIMIZE); |
---|
913 | PGASetNumDemes(ctx, 4); |
---|
914 | PGASetUp(ctx); |
---|
915 | PGARun(ctx, f); |
---|
916 | PGADestroy(ctx); |
---|
917 | |
---|
918 | ****************************************************************************I*/ |
---|
919 | void PGASetNumDemes( PGAContext *ctx, int numdemes) |
---|
920 | { |
---|
921 | PGADebugEntered("PGASetNumDemes"); |
---|
922 | |
---|
923 | if ( numdemes < 1 ) |
---|
924 | PGAError(ctx, "PGASetNumDemes: Invalid value of numdemes:", |
---|
925 | PGA_FATAL, PGA_INT, (void *) &numdemes); |
---|
926 | |
---|
927 | ctx->par.NumDemes = numdemes; |
---|
928 | |
---|
929 | PGADebugExited("PGASetNumDemes"); |
---|
930 | } |
---|
931 | |
---|
932 | |
---|
933 | /*I*************************************************************************** |
---|
934 | PGAGetNumDemes - Returns the number of demes to use in a neighborhood model |
---|
935 | |
---|
936 | Category: Parallel |
---|
937 | |
---|
938 | Inputs: |
---|
939 | ctx - context variable |
---|
940 | |
---|
941 | Outputs: |
---|
942 | the number of demes to use in a neighborhood model |
---|
943 | |
---|
944 | Example: |
---|
945 | PGAContext *ctx; |
---|
946 | int npop; |
---|
947 | : |
---|
948 | npop = PGAGetNumDemes(ctx); |
---|
949 | |
---|
950 | ***************************************************************************I*/ |
---|
951 | int PGAGetNumDemes (PGAContext *ctx) |
---|
952 | { |
---|
953 | PGADebugEntered("PGAGetNumDemes"); |
---|
954 | PGAFailIfNotSetUp("PGAGetNumDemes"); |
---|
955 | |
---|
956 | PGADebugExited("PGAGetNumDemes"); |
---|
957 | |
---|
958 | return(ctx->par.NumDemes); |
---|
959 | } |
---|
960 | |
---|
961 | |
---|
962 | /*U**************************************************************************** |
---|
963 | PGASetCommunicator - Set the default communicator to use when PGARun is |
---|
964 | called. Does not necessarily need to be the same as the number of |
---|
965 | processes in MPI_COMM_WORLD (which is the default). |
---|
966 | |
---|
967 | Category: Parallel |
---|
968 | |
---|
969 | Inputs: |
---|
970 | ctx - context variable |
---|
971 | comm - communicator to use |
---|
972 | |
---|
973 | Outputs: |
---|
974 | None |
---|
975 | |
---|
976 | Example: |
---|
977 | MPI_Comm mycomm; |
---|
978 | PGAContext *ctx, |
---|
979 | double f(PGAContext *ctx, int p, int pop); |
---|
980 | : |
---|
981 | ctx = PGACreate(&argc, argv, PGA_DATATYPE_BINARY, 100, PGA_MAXIMIZE); |
---|
982 | PGASetCommunicator(ctx, mycomm); |
---|
983 | PGASetUp(ctx); |
---|
984 | PGARun(ctx, f); |
---|
985 | PGADestroy(ctx); |
---|
986 | |
---|
987 | ****************************************************************************U*/ |
---|
988 | void PGASetCommunicator( PGAContext *ctx, MPI_Comm comm) |
---|
989 | { |
---|
990 | |
---|
991 | PGADebugEntered("PGASetCommunicator"); |
---|
992 | |
---|
993 | ctx->par.DefaultComm = comm; |
---|
994 | |
---|
995 | PGADebugExited("PGASetCommunicator"); |
---|
996 | } |
---|
997 | |
---|
998 | |
---|
999 | /*U**************************************************************************** |
---|
1000 | PGAGetCommunicator - Returns the default communicator used when PGARun is |
---|
1001 | called. |
---|
1002 | |
---|
1003 | Category: Parallel |
---|
1004 | |
---|
1005 | Inputs: |
---|
1006 | ctx - context variable |
---|
1007 | |
---|
1008 | Outputs: |
---|
1009 | The default communicator |
---|
1010 | |
---|
1011 | Example: |
---|
1012 | MPI_Comm comm; |
---|
1013 | PGAContext *ctx, |
---|
1014 | double f(PGAContext *ctx, int p, int pop); |
---|
1015 | : |
---|
1016 | ctx = PGACreate(&argc, argv, PGA_DATATYPE_BINARY, 100, PGA_MAXIMIZE); |
---|
1017 | PGASetUp(ctx); |
---|
1018 | comm = PGAGetCommunicator(ctx); |
---|
1019 | |
---|
1020 | |
---|
1021 | ****************************************************************************U*/ |
---|
1022 | MPI_Comm PGAGetCommunicator( PGAContext *ctx) |
---|
1023 | { |
---|
1024 | |
---|
1025 | PGADebugEntered("PGAGetCommunicator"); |
---|
1026 | |
---|
1027 | PGADebugExited("PGAGetCommunicator"); |
---|
1028 | |
---|
1029 | return(ctx->par.DefaultComm); |
---|
1030 | } |
---|