[petsc-users] Matrix Assembly too slow
Barry Smith
bsmith at mcs.anl.gov
Sat May 2 14:42:50 CDT 2015
You have two hundred processes banging on the same file on the same filesystem fighting with each other to read in the matrix. That's like hiring two hundred guys to dig a ditch but making them share one shovel; you won't get speed up, you'll get speed down.
Make a simple sequential PETSc program that reads in the matrix and then store it with MatView() in binary format. Then in your parallel program use MatLoad() to read the matrix in (it will take a few seconds to read in the matrix in that case).
Barry
> On May 2, 2015, at 2:10 PM, Vijay Gopal Chilkuri <vijay.gopal.c at gmail.com> wrote:
>
> Hi,
>
> I'm trying to diagonalize large matrices using PETSc and SLEPc.
> I've successfully diagonalized 100 million dimensional matrix in 2hours.
>
> But, the problem is when i try to diagonailze (similar) a smaller metrix of
> dimension 67,000,000 (24 nonzero elements per row) with 10 noes running 20 processors each (similar to the 100 million case), the matrix assembly itself
> takes 2h !
>
> Could someone point out the mistakes that i'm making ?
>
> i attach the source code and the output with the mail.
>
> thanks,
> Vijay
>
>
> #include <slepceps.h>
> #include <petsctime.h>
>
> #undef __FUNCT__
> #define __FUNCT__ "main"
> int main(int argc,char **argv)
> {
> Mat A; /* problem matrix */
> EPS eps; /* eigenproblem solver context */
> EPSType type;
> PetscReal error,tol,re,im;
> PetscScalar kr,ki,value[52];
> Vec xr,xi;
> PetscInt n=16224936,ii,i,veclen,j,Istart,Iend,col[52],nev,maxit,its,nconv,countcol;
> PetscInt d_nz,o_nz;
> PetscLogDouble t1,t2,tt1,tt2;
> PetscBool FirstBlock=PETSC_FALSE,LastBlock=PETSC_FALSE;
> PetscErrorCode ierr;
> PetscScalar eigr;
> PetscScalar eigi;
> PetscScalar * data;
> Vec Vr,Vi;
> char filename[PETSC_MAX_PATH_LEN]="FIL666";
> PetscViewer viewer;
> PetscBool ishermitian;
> int mpiid;
> long int kk,iii;
> long int tcountcol,tcol[52];
> float val[52];
> long int ntrou=1;
> long int l1[52]={1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
> long int l2[52]={2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
> long int ktyp[52]={1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
> double xjjz[52] ={0.0333333333333,-0.8, 0.,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
> double xjjxy[52] ={0.0333333333333,-0.8,0.,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
> double xtt[52] ={-1.0,0.,0.,
> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
>
> SlepcInitialize(&argc,&argv,(char*)0,NULL);
> ierr = PetscPrintf(PETSC_COMM_WORLD,"\n1-D t-J Eigenproblem, n=%D\n\n",n);CHKERRQ(ierr);
> ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr);
> //ierr = MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n);CHKERRQ(ierr);
> ierr = MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n,n,46,NULL,46,NULL,&A);CHKERRQ(ierr);
> ierr = MatSetFromOptions(A);CHKERRQ(ierr);
> ierr = MatSetUp(A);CHKERRQ(ierr);
>
> ierr = MatGetOwnershipRange(A,&Istart,&Iend);CHKERRQ(ierr);
> ierr = MatCreateAIJ(PETSC_COMM_WORLD,Iend-Istart,Iend-Istart,n,n,46,NULL,46,NULL,&A);CHKERRQ(ierr);
> MPI_Comm_rank(MPI_COMM_WORLD,&mpiid);
> ierr = PetscTime(&tt1);CHKERRQ(ierr);
> for (i=Istart; i<Iend; i++) {
> tcountcol=0;
> iii=i+1;
> if(i%5 == 0 && mpiid==0){
> ierr = PetscTime(&t1);CHKERRQ(ierr);
> }
> unit_l1_(
> l1,
> l2,
> ktyp,
> &iii,
> xjjxy,
> xjjz ,
> xtt ,
> &tcountcol,
> &ntrou,
> tcol,
> val);
> for(kk=0;kk<52;kk++){
> value[kk] = val[kk];
> col[kk] = tcol[kk]-1;
> }
> if(i%5 == 0 && mpiid==0){
> ierr = PetscTime(&t2);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," i: %d\n mpiid: %d\ntime: %f\n",i,mpiid,t2-t1);CHKERRQ(ierr);
> }
> countcol=tcountcol;
> if(i%5 == 0 && mpiid==0){
> ierr = PetscTime(&t1);CHKERRQ(ierr);
> }
> ierr = MatSetValues(A,1,&i,countcol,col,value,INSERT_VALUES);CHKERRQ(ierr);
> if(i%5 == 0 && mpiid==0){
> ierr = PetscTime(&t2);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," processor \n mpiid: %d\ntime: %f\n",mpiid,t2-t1);CHKERRQ(ierr);
> }
> }
> ierr = PetscTime(&tt2);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Time used to build the matrix: %f\n",tt2-tt1);CHKERRQ(ierr);
>
>
> ierr = PetscTime(&tt1);CHKERRQ(ierr);
> ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
> ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr);
> ierr = PetscTime(&tt2);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Time used to assemble the matrix: %f\n",tt2-tt1);CHKERRQ(ierr);
> ierr = MatGetVecs(A,NULL,&xr);CHKERRQ(ierr);
> ierr = MatGetVecs(A,NULL,&xi);CHKERRQ(ierr);
>
> ierr = EPSCreate(PETSC_COMM_WORLD,&eps);CHKERRQ(ierr);
> ierr = EPSSetOperators(eps,A,NULL);CHKERRQ(ierr);
> ierr = EPSSetProblemType(eps,EPS_HEP);CHKERRQ(ierr);
> ierr = EPSSetWhichEigenpairs(eps,EPS_SMALLEST_REAL);CHKERRQ(ierr);
>
> ierr = EPSSetFromOptions(eps);CHKERRQ(ierr);
> tol = 1.e-8;
> maxit = 10000000;
> ierr = EPSSetTolerances(eps,tol,maxit);CHKERRQ(ierr);
>
> ierr = PetscTime(&t1);CHKERRQ(ierr);
> ierr = EPSSolve(eps);CHKERRQ(ierr);
> ierr = PetscTime(&t2);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Time used: %f\n",t2-t1);CHKERRQ(ierr);
> ierr = EPSGetIterationNumber(eps,&its);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Number of iterations of the method: %D\n",its);CHKERRQ(ierr);
> ierr = EPSGetType(eps,&type);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Solution method: %s\n\n",type);CHKERRQ(ierr);
> ierr = EPSGetDimensions(eps,&nev,NULL,NULL);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Number of requested eigenvalues: %D\n",nev);CHKERRQ(ierr);
> ierr = EPSGetTolerances(eps,&tol,&maxit);CHKERRQ(ierr);
> ierr = PetscPrintf(PETSC_COMM_WORLD," Stopping condition: tol=%.4g, maxit=%D\n",(double)tol,maxit);CHKERRQ(ierr);
>
> ierr = EPSGetConverged(eps,&nconv);CHKERRQ(ierr);
> ierr = EPSPrintSolution(eps,NULL);CHKERRQ(ierr);
> /*
> EPSGetConverged(eps,&nconv);
> if (nconv>0) {
> PetscViewerASCIIOpen(PETSC_COMM_WORLD,filename,&viewer);
> EPSIsHermitian(eps,&ishermitian);
> for (i=0;i<nconv;i++) {
> EPSGetEigenvector(eps,i,xr,xi);
> VecView(xr,viewer);
> #if !defined(PETSC_USE_COMPLEX)
> if (!ishermitian) { VecView(xi,viewer); }
> #endif
> }
> PetscViewerDestroy(&viewer);
> }
> */
> ierr = EPSDestroy(&eps);CHKERRQ(ierr);
> ierr = MatDestroy(&A);CHKERRQ(ierr);
> ierr = VecDestroy(&xr);CHKERRQ(ierr);
> ierr = VecDestroy(&xi);CHKERRQ(ierr);
> ierr = SlepcFinalize();
> return 0;
> }
>
> OUTPUT:
> Time used to build the matrix: 1914.729022
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> [165] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [35] MatStashScatterBegin_Private(): No of messages: 0
> [35] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [99] MatStashScatterBegin_Private(): No of messages: 0
> [99] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [59] MatStashScatterBegin_Private(): No of messages: 0
> [59] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [2] MatStashScatterBegin_Private(): No of messages: 0
> [2] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [180] MatStashScatterBegin_Private(): No of messages: 0
> [180] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [102] MatStashScatterBegin_Private(): No of messages: 0
> [102] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [71] MatStashScatterBegin_Private(): No of messages: 0
> [71] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [147] MatStashScatterBegin_Private(): No of messages: 0
> [147] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [122] MatStashScatterBegin_Private(): No of messages: 0
> [122] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [167] MatStashScatterBegin_Private(): No of messages: 0
> [167] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [36] MatStashScatterBegin_Private(): No of messages: 0
> [36] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [82] MatStashScatterBegin_Private(): No of messages: 0
> [82] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [41] MatStashScatterBegin_Private(): No of messages: 0
> [41] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [3] MatStashScatterBegin_Private(): No of messages: 0
> [3] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [181] MatStashScatterBegin_Private(): No of messages: 0
> [181] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [103] MatStashScatterBegin_Private(): No of messages: 0
> [103] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [72] MatStashScatterBegin_Private(): No of messages: 0
> [72] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [149] MatStashScatterBegin_Private(): No of messages: 0
> [149] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [123] MatStashScatterBegin_Private(): No of messages: 0
> [123] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [168] MatStashScatterBegin_Private(): No of messages: 0
> [168] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [37] MatStashScatterBegin_Private(): No of messages: 0
> [37] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [83] MatStashScatterBegin_Private(): No of messages: 0
> [83] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [42] MatStashScatterBegin_Private(): No of messages: 0
> [42] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [4] MatStashScatterBegin_Private(): No of messages: 0
> [4] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [183] MatStashScatterBegin_Private(): No of messages: 0
> [183] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [104] MatStashScatterBegin_Private(): No of messages: 0
> [104] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [73] MatStashScatterBegin_Private(): No of messages: 0
> [73] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [150] MatStashScatterBegin_Private(): No of messages: 0
> [150] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [124] MatStashScatterBegin_Private(): No of messages: 0
> [124] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [172] MatStashScatterBegin_Private(): No of messages: 0
> [172] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [38] MatStashScatterBegin_Private(): No of messages: 0
> [38] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [85] MatStashScatterBegin_Private(): No of messages: 0
> [85] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [43] MatStashScatterBegin_Private(): No of messages: 0
> [43] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [5] MatStashScatterBegin_Private(): No of messages: 0
> [5] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [184] MatStashScatterBegin_Private(): No of messages: 0
> [184] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [106] MatStashScatterBegin_Private(): No of messages: 0
> [106] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [74] MatStashScatterBegin_Private(): No of messages: 0
> [74] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [151] MatStashScatterBegin_Private(): No of messages: 0
> [151] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [125] MatStashScatterBegin_Private(): No of messages: 0
> [125] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [173] MatStashScatterBegin_Private(): No of messages: 0
> [173] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [39] MatStashScatterBegin_Private(): No of messages: 0
> [39] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [87] MatStashScatterBegin_Private(): No of messages: 0
> [87] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [46] MatStashScatterBegin_Private(): No of messages: 0
> [46] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [8] MatStashScatterBegin_Private(): No of messages: 0
> [8] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [186] MatStashScatterBegin_Private(): No of messages: 0
> [186] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [107] MatStashScatterBegin_Private(): No of messages: 0
> [107] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [75] MatStashScatterBegin_Private(): No of messages: 0
> [75] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [152] MatStashScatterBegin_Private(): No of messages: 0
> [152] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [126] MatStashScatterBegin_Private(): No of messages: 0
> [126] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [175] MatStashScatterBegin_Private(): No of messages: 0
> [175] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [22] MatStashScatterBegin_Private(): No of messages: 0
> [22] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [88] MatStashScatterBegin_Private(): No of messages: 0
> [88] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [49] MatStashScatterBegin_Private(): No of messages: 0
> [49] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [16] MatStashScatterBegin_Private(): No of messages: 0
> [16] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [189] MatStashScatterBegin_Private(): No of messages: 0
> [189] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [108] MatStashScatterBegin_Private(): No of messages: 0
> [108] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [76] MatStashScatterBegin_Private(): No of messages: 0
> [76] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [153] MatStashScatterBegin_Private(): No of messages: 0
> [153] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [127] MatStashScatterBegin_Private(): No of messages: 0
> [127] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [176] MatStashScatterBegin_Private(): No of messages: 0
> [176] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [23] MatStashScatterBegin_Private(): No of messages: 0
> [23] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [89] MatStashScatterBegin_Private(): No of messages: 0
> [89] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [50] MatStashScatterBegin_Private(): No of messages: 0
> [50] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [18] MatStashScatterBegin_Private(): No of messages: 0
> [18] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [191] MatStashScatterBegin_Private(): No of messages: 0
> [191] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [110] MatStashScatterBegin_Private(): No of messages: 0
> [110] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [77] MatStashScatterBegin_Private(): No of messages: 0
> [77] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [154] MatStashScatterBegin_Private(): No of messages: 0
> [154] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [128] MatStashScatterBegin_Private(): No of messages: 0
> [128] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [177] MatStashScatterBegin_Private(): No of messages: 0
> [177] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [27] MatStashScatterBegin_Private(): No of messages: 0
> [27] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [90] MatStashScatterBegin_Private(): No of messages: 0
> [90] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [51] MatStashScatterBegin_Private(): No of messages: 0
> [51] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [19] MatStashScatterBegin_Private(): No of messages: 0
> [19] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [193] MatStashScatterBegin_Private(): No of messages: 0
> [193] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [117] MatStashScatterBegin_Private(): No of messages: 0
> [117] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [78] MatStashScatterBegin_Private(): No of messages: 0
> [78] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [155] MatStashScatterBegin_Private(): No of messages: 0
> [155] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [129] MatStashScatterBegin_Private(): No of messages: 0
> [129] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [178] MatStashScatterBegin_Private(): No of messages: 0
> [178] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [30] MatStashScatterBegin_Private(): No of messages: 0
> [30] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [96] MatStashScatterBegin_Private(): No of messages: 0
> [96] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [52] MatStashScatterBegin_Private(): No of messages: 0
> [52] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [197] MatStashScatterBegin_Private(): No of messages: 0
> [197] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [118] MatStashScatterBegin_Private(): No of messages: 0
> [118] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [79] MatStashScatterBegin_Private(): No of messages: 0
> [79] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [159] MatStashScatterBegin_Private(): No of messages: 0
> [159] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [131] MatStashScatterBegin_Private(): No of messages: 0
> [131] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [179] MatStashScatterBegin_Private(): No of messages: 0
> [179] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [31] MatStashScatterBegin_Private(): No of messages: 0
> [31] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [97] MatStashScatterBegin_Private(): No of messages: 0
> [97] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [57] MatStashScatterBegin_Private(): No of messages: 0
> [57] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [98] MatStashScatterBegin_Private(): No of messages: 0
> [98] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [58] MatStashScatterBegin_Private(): No of messages: 0
> [58] MatAssemblyBegin_MPIAIJ(): Stash has 0 entries, uses 0 mallocs.
> [104] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3238253 unneeded,493497 used
> [104] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [104] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [104] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [4] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3197999 unneeded,533751 used
> [4] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [4] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [4] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [106] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3243809 unneeded,487941 used
> [106] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [106] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [106] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [144] MatAssemblyEnd_SeqAIJ(): Matrix size: 81124 X 81124; storage space: 3243446 unneeded,488258 used
> [144] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [144] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 11
> [144] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81124) < 0.6. Do not use CompressedRow routines.
> [123] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3237359 unneeded,494391 used
> [123] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [123] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [123] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [173] MatAssemblyEnd_SeqAIJ(): Matrix size: 81124 X 81124; storage space: 3245082 unneeded,486622 used
> [173] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [173] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [173] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81124) < 0.6. Do not use CompressedRow routines.
> [85] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3217795 unneeded,513955 used
> [85] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [85] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [85] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [6] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3208633 unneeded,523117 used
> [6] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [6] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [6] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [185] MatAssemblyEnd_SeqAIJ(): Matrix size: 81124 X 81124; storage space: 3209020 unneeded,522684 used
> [185] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [185] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [185] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81124) < 0.6. Do not use CompressedRow routines.
> [108] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3216305 unneeded,515445 used
> [108] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [108] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [73] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3201643 unneeded,530107 used
> [73] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [73] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [73] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [146] MatAssemblyEnd_SeqAIJ(): Matrix size: 81124 X 81124; storage space: 3234040 unneeded,497664 used
> [146] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [146] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 11
> [146] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81124) < 0.6. Do not use CompressedRow routines.
> [127] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3243435 unneeded,488315 used
> [127] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [127] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [127] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [177] MatAssemblyEnd_SeqAIJ(): Matrix size: 81124 X 81124; storage space: 3249858 unneeded,481846 used
> [177] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [177] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [177] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81124) < 0.6. Do not use CompressedRow routines.
> [27] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3207727 unneeded,524023 used
> [27] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [27] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [27] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [87] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3220647 unneeded,511103 used
> [87] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [87] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 12
> [87] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [54] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3197939 unneeded,533811 used
> [54] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [54] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [54] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [8] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3179441 unneeded,552309 used
> [8] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [8] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [8] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [187] MatAssemblyEnd_SeqAIJ(): Matrix size: 81124 X 81124; storage space: 3197890 unneeded,533814 used
> [187] MatAssemblyEnd_SeqAIJ(): Number of mallocs during MatSetValues() is 0
> [187] MatAssemblyEnd_SeqAIJ(): Maximum nonzeros in any row is 13
> [187] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81124) < 0.6. Do not use CompressedRow routines.
> [108] MatCheckCompressedRow(): Found the ratio (num_zerorows 0)/(num_localrows 81125) < 0.6. Do not use CompressedRow routines.
> [74] MatAssemblyEnd_SeqAIJ(): Matrix size: 81125 X 81125; storage space: 3200381 unneeded,531369 used
>
> <ex1.c><inp.log>
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