Actual source code: ex3.cxx
petsc-3.4.2 2013-07-02
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 <assert.h>
14: #include <petscao.h>
15: #include <mpi.h>
17: using namespace std;
19: int main(int argc, char** argv)
20: {
22: AO ao;
23: IS isapp;
24: char infile[PETSC_MAX_PATH_LEN],datafiles[PETSC_MAX_PATH_LEN];
25: PetscBool flg;
27: PetscInitialize(&argc, &argv, (char*)0, help);
28: int size=-1; MPI_Comm_size(PETSC_COMM_WORLD, &size);
29: int myrank=-1; MPI_Comm_rank(PETSC_COMM_WORLD, &myrank);
31: PetscOptionsGetString(PETSC_NULL,"-datafiles",datafiles,sizeof(datafiles),&flg);
32: if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Must specify -datafiles ${DATAFILESPATH}/ao");
34: // read in application indices
35: PetscSNPrintf(infile,sizeof(infile),"%s/AO%dCPUs/ao_p%d_appindices.txt",datafiles,size,myrank);
36: //cout << infile << endl;
37: ifstream fin(infile);
38: if (!fin) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"File not found: %s",infile);
39: vector<int> myapp;
40: int tmp=-1;
41: while (!fin.eof()) {
42: tmp=-1;
43: fin >> tmp;
44: if (tmp==-1) break;
45: myapp.push_back(tmp);
46: }
47: PetscSynchronizedPrintf(PETSC_COMM_WORLD,"[%d] has %D indices.\n",
48: myrank,myapp.size());
49: PetscSynchronizedFlush(PETSC_COMM_WORLD);
51: ISCreateGeneral(PETSC_COMM_WORLD, myapp.size(), &(myapp[0]), PETSC_USE_POINTER, &isapp);
52: //ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
54: AOCreate(PETSC_COMM_WORLD, &ao);
55: AOSetIS(ao, isapp, NULL);
56: AOSetType(ao, AOMEMORYSCALABLE);
57: AOSetFromOptions(ao);
59: if (myrank==0) cout << "AO has been set up." << endl;
61: AODestroy(&ao);
62: ISDestroy(&isapp);
64: if (myrank==0) cout << "AO is done." << endl;
66: PetscFinalize();
67: return 0;
68: }