# Contents of /trunk/paso/src/Functions.c

Revision 3006 - (show annotations)
Thu Apr 22 08:31:28 2010 UTC (12 years, 2 months ago) by gross
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File size: 3046 byte(s)
```local_norm_w removed
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 1 2 /******************************************************* 3 * 4 * Copyright (c) 2003-2010 by University of Queensland 5 * Earth Systems Science Computational Center (ESSCC) 6 * http://www.uq.edu.au/esscc 7 * 8 * Primary Business: Queensland, Australia 9 * Licensed under the Open Software License version 3.0 10 * http://www.opensource.org/licenses/osl-3.0.php 11 * 12 *******************************************************/ 13 14 15 #include "Common.h" 16 #include "Functions.h" 17 #include "PasoUtil.h" 18 #include "Solver.h" 19 #include "FCTSolver.h" 20 /* 21 * numerical calculation of the directional derivative J0w if F at x0 in the direction w. f0 is the value of F at x0. 22 * setoff is workspace 23 */ 24 25 err_t Paso_FunctionDerivative(double* J0w, const double* w, Paso_Function* F, const double *f0, const double *x0, double* setoff, Paso_Performance* pp) 26 { 27 err_t err=SOLVER_NO_ERROR; 28 const dim_t n=F->n; 29 dim_t i; 30 register double aw; 31 const double epsnew=sqrt(EPSILON); 32 double norm_x0, tt, ttt, s=epsnew, local_s, norm_w=0.; 33 34 norm_x0=Paso_lsup(n,x0,F->mpi_info); 35 norm_w=Paso_lsup(n,w,F->mpi_info); 36 tt=EPSILON*norm_x0; 37 ttt=sqrt(EPSILON)*norm_w; 38 #pragma omp parallel private(local_s) 39 { 40 local_s=s; 41 #pragma omp for private(i, aw) 42 for (i=0;ittt ) { 45 local_s=MAX(local_s,fabs(x0[i])/aw); 46 } 47 } 48 #pragma omp critical 49 { 50 s=MAX(s,local_s); 51 } 52 53 } 54 #ifdef PASO_MPI 55 { 56 double local_v[2], v[2]; 57 local_v[0]=s; 58 local_v[1]=norm_w; 59 MPI_Allreduce(local_v,v, 2, MPI_DOUBLE, MPI_MAX, F->mpi_info); 60 s=v[0]; 61 norm_w=v[1]; 62 } 63 #endif 64 /* printf("s :: = %e, %e \n",s, norm_x0/norm_w); */ 65 if (norm_w>0) { 66 s=s*epsnew; 67 /* printf("s = %e\n",s); */ 68 Paso_LinearCombination(n,setoff,1.,x0,s,w); 69 err=Paso_FunctionCall(F,J0w,setoff,pp); 70 if (err==SOLVER_NO_ERROR) { 71 Paso_Update(n,1./s,J0w,-1./s,f0); /* J0w = (J0w - f0)/epsnew; */ 72 /* { 73 int i; 74 for (i=0;ikind) { 92 case LINEAR_SYSTEM: 93 return Paso_Function_LinearSystem_call(F, value, arg,pp); 94 break; 95 case FCT: 96 return Paso_FCTSolver_Function_call(F, value, arg, pp); 97 break; 98 default: 99 return SYSTEM_ERROR; 100 } 101 } 102 /* Added by PGH, assume a null pointe is an error */ 103 return SYSTEM_ERROR; 104 } 105 /* 106 * clear Paso_Function 107 */ 108 void Paso_Function_free(Paso_Function * F) { 109 if (F!=NULL) { 110 111 switch(F->kind) { 112 case LINEAR_SYSTEM: 113 Paso_Function_LinearSystem_free(F); 114 break; 115 case FCT: 116 Paso_FCTSolver_Function_free(F); 117 break; 118 default: 119 MEMFREE(F); 120 } 121 } 122 }