Actual source code: ex3.cxx
petsc-3.7.2 2016-06-05
2: static char help[] = "AO test contributed by Sebastian Steiger <steiger@purdue.edu>, March 2011\n\n";
4: /*
5: Example of usage:
6: mpiexec -n 12 ./ex3
7: mpiexec -n 30 ./ex3 -ao_type basic
8: */
10: #include <iostream>
11: #include <fstream>
12: #include <vector>
13: #include <petscvec.h>
14: #include <petscao.h>
16: using namespace std;
18: int main(int argc, char** argv)
19: {
21: AO ao;
22: IS isapp;
23: char infile[PETSC_MAX_PATH_LEN],datafiles[PETSC_MAX_PATH_LEN];
24: PetscBool flg;
26: PetscInitialize(&argc, &argv, (char*)0, help);
27: int size=-1; MPI_Comm_size(PETSC_COMM_WORLD, &size);
28: int myrank=-1; MPI_Comm_rank(PETSC_COMM_WORLD, &myrank);
30: PetscOptionsGetString(NULL,NULL,"-datafiles",datafiles,sizeof(datafiles),&flg);
31: if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Must specify -datafiles ${DATAFILESPATH}/ao");
33: // read in application indices
34: PetscSNPrintf(infile,sizeof(infile),"%s/AO%dCPUs/ao_p%d_appindices.txt",datafiles,size,myrank);
35: //cout << infile << endl;
36: ifstream fin(infile);
37: if (!fin) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"File not found: %s",infile);
38: vector<int> myapp;
39: int tmp=-1;
40: while (!fin.eof()) {
41: tmp=-1;
42: fin >> tmp;
43: if (tmp==-1) break;
44: myapp.push_back(tmp);
45: }
46: PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d] has %D indices.\n",
47: myrank,myapp.size());
48: PetscSynchronizedFlush(PETSC_COMM_WORLD,PETSC_STDOUT);
50: ISCreateGeneral(PETSC_COMM_WORLD, myapp.size(), &(myapp[0]), PETSC_USE_POINTER, &isapp);
51: //ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
53: AOCreate(PETSC_COMM_WORLD, &ao);
54: AOSetIS(ao, isapp, NULL);
55: AOSetType(ao, AOMEMORYSCALABLE);
56: AOSetFromOptions(ao);
58: if (myrank==0) cout << "AO has been set up." << endl;
60: AODestroy(&ao);
61: ISDestroy(&isapp);
63: if (myrank==0) cout << "AO is done." << endl;
65: PetscFinalize();
66: return 0;
67: }