GCC Code Coverage Report


Directory: ./
File: src/sys/classes/ds/tests/test18.c
Date: 2025-10-03 04:28:47
Exec Total Coverage
Lines: 70 70 100.0%
Functions: 2 2 100.0%
Branches: 231 392 58.9%

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1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10
11 static char help[] = "Test DSSynchronize() on a NHEP.\n\n";
12
13 #include <slepcds.h>
14
15 350 PetscErrorCode CheckArray(PetscScalar *A,const char *label,PetscInt k)
16 {
17 350 PetscInt j;
18 350 PetscMPIInt p,size,rank,k_;
19 350 PetscScalar dif,*buf;
20 350 PetscReal error;
21
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350 PetscFunctionBeginUser;
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350 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size));
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350 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank));
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350 PetscCall(PetscMPIIntCast(k,&k_));
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350 if (rank) PetscCallMPI(MPI_Send(A,k_,MPIU_SCALAR,0,111,PETSC_COMM_WORLD));
27 else {
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140 PetscCall(PetscMalloc1(k,&buf));
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350 for (p=1;p<size;p++) {
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210 PetscCallMPI(MPI_Recv(buf,k_,MPIU_SCALAR,p,111,PETSC_COMM_WORLD,MPI_STATUS_IGNORE));
31 dif = 0.0;
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13110 for (j=0;j<k;j++) dif += A[j]-buf[j];
33 210 error = PetscAbsScalar(dif);
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210 if (error>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD," Array %s differs in proc %d: %g\n",label,(int)p,(double)error));
35 }
36
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140 PetscCall(PetscFree(buf));
37 }
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70 PetscFunctionReturn(PETSC_SUCCESS);
39 }
40
41 120 int main(int argc,char **argv)
42 {
43 120 DS ds;
44 120 SlepcSC sc;
45 120 PetscScalar *A,*Q,*wr,*wi;
46 120 PetscReal re,im;
47 120 PetscInt i,j,n=10;
48 120 PetscMPIInt size;
49
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120 PetscFunctionBeginUser;
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120 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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120 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
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120 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type NHEP - dimension %" PetscInt_FMT ".\n",n));
54
55 /* Create DS object */
56
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120 PetscCall(DSCreate(PETSC_COMM_WORLD,&ds));
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120 PetscCall(DSSetType(ds,DSNHEP));
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120 PetscCall(DSSetFromOptions(ds));
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120 PetscCall(DSAllocate(ds,n));
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120 PetscCall(DSSetDimensions(ds,n,0,0));
61
62 /* Fill with Grcar matrix */
63
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120 PetscCall(DSGetArray(ds,DS_MAT_A,&A));
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1200 for (i=1;i<n;i++) A[i+(i-1)*n]=-1.0;
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600 for (j=0;j<4;j++) {
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4560 for (i=0;i<n-j;i++) A[i+(i+j)*n]=1.0;
67 }
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120 PetscCall(DSRestoreArray(ds,DS_MAT_A,&A));
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120 PetscCall(DSSetState(ds,DS_STATE_INTERMEDIATE));
70
71 /* Solve */
72
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120 PetscCall(PetscMalloc2(n,&wr,n,&wi));
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120 PetscCall(DSGetSlepcSC(ds,&sc));
74 120 sc->comparison = SlepcCompareLargestMagnitude;
75 120 sc->comparisonctx = NULL;
76 120 sc->map = NULL;
77 120 sc->mapobj = NULL;
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120 PetscCall(DSSolve(ds,wr,wi));
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120 PetscCall(DSSort(ds,wr,wi,NULL,NULL,NULL));
80
81 /* Print eigenvalues */
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120 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed eigenvalues =\n"));
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1320 for (i=0;i<n;i++) {
84 #if defined(PETSC_USE_COMPLEX)
85 600 re = PetscRealPart(wr[i]);
86 600 im = PetscImaginaryPart(wr[i]);
87 #else
88 600 re = wr[i];
89 600 im = wi[i];
90 #endif
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1200 if (PetscAbs(im)<1e-10) PetscCall(PetscPrintf(PETSC_COMM_WORLD," %.5f\n",(double)re));
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1200 else PetscCall(PetscPrintf(PETSC_COMM_WORLD," %.5f%+.5fi\n",(double)re,(double)im));
93 }
94
95 /* Synchronize data and check */
96
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120 PetscCall(DSSynchronize(ds,wr,wi));
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120 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size));
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120 if (size>1) {
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100 PetscCall(CheckArray(wr,"wr",n));
100 #if !defined(PETSC_USE_COMPLEX)
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50 PetscCall(CheckArray(wi,"wi",n));
102 #endif
103
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100 PetscCall(DSGetArray(ds,DS_MAT_A,&A));
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100 PetscCall(CheckArray(A,"A",n*n));
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100 PetscCall(DSRestoreArray(ds,DS_MAT_A,&A));
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100 PetscCall(DSGetArray(ds,DS_MAT_Q,&Q));
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100 PetscCall(CheckArray(Q,"Q",n*n));
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100 PetscCall(DSRestoreArray(ds,DS_MAT_Q,&Q));
109 }
110
111
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120 PetscCall(PetscFree2(wr,wi));
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120 PetscCall(DSDestroy(&ds));
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120 PetscCall(SlepcFinalize());
114 return 0;
115 }
116
117 /*TEST
118
119 testset:
120 nsize: {{1 2 3}}
121 filter: sed -e "s/[+-]\([0-9]\.[0-9]*i\)/+-\\1/" | sed -e "s/1.58254/1.58255/" | sed -e "s/1.75989/1.75988/" | sed -e "s/1.01945/1.01946/"
122 output_file: output/test18_1.out
123 test:
124 suffix: 1
125 args: -ds_parallel redundant
126 test:
127 suffix: 2
128 args: -ds_parallel synchronized
129
130 TEST*/
131