GCC Code Coverage Report

Directory: ./
File: src/eps/tests/test17.c
Date: 2025-12-10 04:20:18
Exec Total Coverage
Lines: 144 149 96.6%
Functions: 1 1 100.0%
Branches: 514 808 63.6%
Line Branch Exec Source
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 interface functions of spectrum-slicing Krylov-Schur.\n\n"
12 "This is based on ex12.c. The command line options are:\n"
13 " -n <n>, where <n> = number of grid subdivisions in x dimension.\n"
14 " -m <m>, where <m> = number of grid subdivisions in y dimension.\n\n";
15
16 #include <slepceps.h>
17
18 30 int main(int argc,char **argv)
19 {
20 30 Mat A,B; /* matrices */
21 30 Mat As,Bs; /* matrices distributed in subcommunicators */
22 30 Mat Au; /* matrix used to modify A on subcommunicators */
23 30 EPS eps; /* eigenproblem solver context */
24 30 ST st; /* spectral transformation context */
25 30 KSP ksp;
26 30 PC pc;
27 30 Vec v;
28 30 PetscMPIInt size,rank;
29 30 PetscInt N,n=35,m,Istart,Iend,II,nev,ncv,mpd,i,j,k,*inertias,npart,nval,nloc,nlocs,mlocs;
30 30 PetscBool flag,showinertia=PETSC_TRUE,lock,detect;
31 30 PetscReal int0,int1,*shifts,keep,*subint,*evals;
32 30 PetscScalar lambda;
33 30 char vlist[4000];
34
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 30 PetscFunctionBeginUser;
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 30 PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
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 30 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size));
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 30 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank));
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 30 PetscCall(PetscOptionsGetBool(NULL,NULL,"-showinertia",&showinertia,NULL));
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 30 PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
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 30 PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,&flag));
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 30 if (!flag) m=n;
44 30 N = n*m;
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nSpectrum-slicing test, N=%" PetscInt_FMT " (%" PetscInt_FMT "x%" PetscInt_FMT " grid)\n\n",N,n,m));
46
47 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
48 Compute the matrices that define the eigensystem, Ax=kBx
49 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
50
51
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 30 PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
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 30 PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,N));
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 30 PetscCall(MatSetFromOptions(A));
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 30 PetscCall(MatCreate(PETSC_COMM_WORLD,&B));
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 30 PetscCall(MatSetSizes(B,PETSC_DECIDE,PETSC_DECIDE,N,N));
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 30 PetscCall(MatSetFromOptions(B));
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 30 PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
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 24530 for (II=Istart;II<Iend;II++) {
61 24500 i = II/n; j = II-i*n;
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 24500 if (i>0) PetscCall(MatSetValue(A,II,II-n,-1.0,INSERT_VALUES));
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 24500 if (i<m-1) PetscCall(MatSetValue(A,II,II+n,-1.0,INSERT_VALUES));
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 24500 if (j>0) PetscCall(MatSetValue(A,II,II-1,-1.0,INSERT_VALUES));
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 24500 if (j<n-1) PetscCall(MatSetValue(A,II,II+1,-1.0,INSERT_VALUES));
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 24500 PetscCall(MatSetValue(A,II,II,4.0,INSERT_VALUES));
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 24500 PetscCall(MatSetValue(B,II,II,2.0,INSERT_VALUES));
68 }
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 30 if (Istart==0) {
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 20 PetscCall(MatSetValue(B,0,0,6.0,INSERT_VALUES));
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 20 PetscCall(MatSetValue(B,0,1,-1.0,INSERT_VALUES));
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 20 PetscCall(MatSetValue(B,1,0,-1.0,INSERT_VALUES));
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 20 PetscCall(MatSetValue(B,1,1,1.0,INSERT_VALUES));
74 }
75
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 30 PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
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 30 PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));
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 30 PetscCall(MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY));
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 30 PetscCall(MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY));
80
81 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
82 Create the eigensolver and set various options
83 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
84
85
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 30 PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
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 30 PetscCall(EPSSetOperators(eps,A,B));
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 30 PetscCall(EPSSetProblemType(eps,EPS_GHEP));
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 30 PetscCall(EPSSetType(eps,EPSKRYLOVSCHUR));
89
90 /*
91 Set interval and other settings for spectrum slicing
92 */
93
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 30 PetscCall(EPSSetWhichEigenpairs(eps,EPS_ALL));
94 30 int0 = 1.1; int1 = 1.3;
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 30 PetscCall(EPSSetInterval(eps,int0,int1));
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 30 PetscCall(EPSGetST(eps,&st));
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 30 PetscCall(STSetType(st,STSINVERT));
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 30 if (size>1) PetscCall(EPSKrylovSchurSetPartitions(eps,size));
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 30 PetscCall(EPSKrylovSchurGetKSP(eps,&ksp));
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 30 PetscCall(KSPGetPC(ksp,&pc));
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 30 PetscCall(KSPSetType(ksp,KSPPREONLY));
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 30 PetscCall(PCSetType(pc,PCCHOLESKY));
103
104 /*
105 Test interface functions of Krylov-Schur solver
106 */
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 30 PetscCall(EPSKrylovSchurGetRestart(eps,&keep));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Restart parameter before changing = %g",(double)keep));
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 30 PetscCall(EPSKrylovSchurSetRestart(eps,0.4));
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 30 PetscCall(EPSKrylovSchurGetRestart(eps,&keep));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %g\n",(double)keep));
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 30 PetscCall(EPSKrylovSchurGetDetectZeros(eps,&detect));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Detect zeros before changing = %d",(int)detect));
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 30 PetscCall(EPSKrylovSchurSetDetectZeros(eps,PETSC_TRUE));
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 30 PetscCall(EPSKrylovSchurGetDetectZeros(eps,&detect));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %d\n",(int)detect));
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 30 PetscCall(EPSKrylovSchurGetLocking(eps,&lock));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Locking flag before changing = %d",(int)lock));
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 30 PetscCall(EPSKrylovSchurSetLocking(eps,PETSC_FALSE));
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 30 PetscCall(EPSKrylovSchurGetLocking(eps,&lock));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to %d\n",(int)lock));
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 30 PetscCall(EPSKrylovSchurGetDimensions(eps,&nev,&ncv,&mpd));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Sub-solve dimensions before changing = [%" PetscInt_FMT ",%" PetscInt_FMT ",%" PetscInt_FMT "]",nev,ncv,mpd));
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 30 PetscCall(EPSKrylovSchurSetDimensions(eps,30,60,60));
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 30 PetscCall(EPSKrylovSchurGetDimensions(eps,&nev,&ncv,&mpd));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," ... changed to [%" PetscInt_FMT ",%" PetscInt_FMT ",%" PetscInt_FMT "]\n",nev,ncv,mpd));
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 30 if (size>1) {
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 20 PetscCall(EPSKrylovSchurGetPartitions(eps,&npart));
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 20 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Using %" PetscInt_FMT " partitions\n",npart));
134
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 20 PetscCall(PetscMalloc1(npart+1,&subint));
136 20 subint[0] = int0;
137 20 subint[npart] = int1;
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 40 for (i=1;i<npart;i++) subint[i] = int0+i*(int1-int0)/npart;
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 20 PetscCall(EPSKrylovSchurSetSubintervals(eps,subint));
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 20 PetscCall(PetscFree(subint));
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 20 PetscCall(EPSKrylovSchurGetSubintervals(eps,&subint));
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 20 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Using sub-interval separations = "));
143
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 40 for (i=1;i<npart;i++) PetscCall(PetscPrintf(PETSC_COMM_WORLD," %g",(double)subint[i]));
144
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 20 PetscCall(PetscFree(subint));
145
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 20 PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\n"));
146 }
147
148
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 30 PetscCall(EPSSetFromOptions(eps));
149
150 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
151 Compute all eigenvalues in interval and display info
152 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
153
154
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 30 PetscCall(EPSSetUp(eps));
155
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 30 PetscCall(EPSKrylovSchurGetInertias(eps,&k,&shifts,&inertias));
156
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Inertias after EPSSetUp:\n"));
157
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 110 for (i=0;i<k;i++) PetscCall(PetscPrintf(PETSC_COMM_WORLD," .. %g (%" PetscInt_FMT ")\n",(double)shifts[i],inertias[i]));
158
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 30 PetscCall(PetscFree(shifts));
159
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 30 PetscCall(PetscFree(inertias));
160
161
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 30 PetscCall(EPSSolve(eps));
162
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 30 PetscCall(EPSGetDimensions(eps,&nev,NULL,NULL));
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 30 PetscCall(EPSGetInterval(eps,&int0,&int1));
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 30 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Found %" PetscInt_FMT " eigenvalues in interval [%g,%g]\n",nev,(double)int0,(double)int1));
165
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 30 if (showinertia) {
167 ✗ PetscCall(EPSKrylovSchurGetInertias(eps,&k,&shifts,&inertias));
168 ✗ PetscCall(PetscPrintf(PETSC_COMM_WORLD," Used %" PetscInt_FMT " shifts (inertia):\n",k));
169 ✗ for (i=0;i<k;i++) PetscCall(PetscPrintf(PETSC_COMM_WORLD," .. %g (%" PetscInt_FMT ")\n",(double)shifts[i],inertias[i]));
170 ✗ PetscCall(PetscFree(shifts));
171 ✗ PetscCall(PetscFree(inertias));
172 }
173
174
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 30 PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
175
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 30 if (size>1) {
177
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 20 PetscCall(EPSKrylovSchurGetSubcommInfo(eps,&k,&nval,&v));
178
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 20 PetscCall(PetscMalloc1(nval,&evals));
179
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 600 for (i=0;i<nval;i++) {
180
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 580 PetscCall(EPSKrylovSchurGetSubcommPairs(eps,i,&lambda,v));
181 580 evals[i] = PetscRealPart(lambda);
182 }
183
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 20 PetscCall(PetscFormatRealArray(vlist,sizeof(vlist),"%f",nval,evals));
184
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 20 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD," Process %d has worked in sub-interval %" PetscInt_FMT ", containing %" PetscInt_FMT " eigenvalues: %s\n",(int)rank,k,nval,vlist));
185
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 20 PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT));
186
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 20 PetscCall(VecDestroy(&v));
187
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 20 PetscCall(PetscFree(evals));
188
189
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 20 PetscCall(EPSKrylovSchurGetSubcommMats(eps,&As,&Bs));
190
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 20 PetscCall(MatGetLocalSize(A,&nloc,NULL));
191
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 20 PetscCall(MatGetLocalSize(As,&nlocs,&mlocs));
192
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 20 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD," Process %d owns %" PetscInt_FMT " rows of the global matrices, and %" PetscInt_FMT " rows in the subcommunicator\n",(int)rank,nloc,nlocs));
193
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 20 PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT));
194
195 /* modify A on subcommunicators */
196
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 20 PetscCall(MatCreate(PetscObjectComm((PetscObject)As),&Au));
197
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 20 PetscCall(MatSetSizes(Au,nlocs,mlocs,N,N));
198
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 20 PetscCall(MatSetFromOptions(Au));
199
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 20 PetscCall(MatGetOwnershipRange(Au,&Istart,&Iend));
200
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 24520 for (II=Istart;II<Iend;II++) PetscCall(MatSetValue(Au,II,II,0.5,INSERT_VALUES));
201
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 20 PetscCall(MatAssemblyBegin(Au,MAT_FINAL_ASSEMBLY));
202
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 20 PetscCall(MatAssemblyEnd(Au,MAT_FINAL_ASSEMBLY));
203
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 20 PetscCall(PetscPrintf(PETSC_COMM_WORLD," Updating internal matrices\n"));
204
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 20 PetscCall(EPSKrylovSchurUpdateSubcommMats(eps,1.1,-5.0,Au,1.0,0.0,NULL,DIFFERENT_NONZERO_PATTERN,PETSC_TRUE));
205
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 20 PetscCall(MatDestroy(&Au));
206
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 20 PetscCall(EPSSolve(eps));
207
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 20 PetscCall(EPSGetDimensions(eps,&nev,NULL,NULL));
208
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 20 PetscCall(EPSGetInterval(eps,&int0,&int1));
209
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 20 PetscCall(PetscPrintf(PETSC_COMM_WORLD," After update, found %" PetscInt_FMT " eigenvalues in interval [%g,%g]\n",nev,(double)int0,(double)int1));
210 }
211
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 30 PetscCall(EPSDestroy(&eps));
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 30 PetscCall(MatDestroy(&A));
213
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 30 PetscCall(MatDestroy(&B));
214
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 30 PetscCall(SlepcFinalize());
215 return 0;
216 }
217
218 /*TEST
219
220 test:
221 suffix: 1
222 nsize: 2
223 args: -showinertia 0 -log_exclude eps,st,rg,bv,ds
224 requires: !single
225
226 test:
227 suffix: 2
228 nsize: 1
229 args: -showinertia 0 -log_exclude eps,st,rg,bv,ds
230 requires: !single
231
232 TEST*/
233