[petsc-dev] MatNest and MatCreateHermitianTranspose

[Pierre Jolivet]

Hello,
I’m using a MatNest with some blocks made of matrices created with MatCreateHermitianTranspose. I end up with the following trace when doing a simple MatMult.
Should this be fixed in matnest.c, matrix.c or htransm.c?

Thanks,
Pierre

(lldb) down
frame #11: 0x000000011ad06830 libpetsc.3.010.dylib`MatMult_Nest(A=0x00007fcc2eb50260, x=0x00007fcc2f019460, y=0x00007fcc2f01ca60) at matnest.c:52
   49       for (j=0; j<nc; j++) {
   50         if (!bA->m[i][j]) continue;
   51         /* y[i] <- y[i] + A[i][j] * x[j] */
-> 52         ierr = MatMultAdd(bA->m[i][j],bx[j],by[i],by[i]);CHKERRQ(ierr);
   53       }
   54     }
   55     for (i=0; i<nr; i++) {ierr = VecRestoreSubVector(y,bA->isglobal.row[i],&by[i]);CHKERRQ(ierr);}
(lldb) 
frame #10: 0x000000011a9d6399 libpetsc.3.010.dylib`MatMultAdd(mat=0x00007fcc2ebfde60, v1=0x00007fcc2f029c60, v2=0x00007fcc2f024660, v3=0x00007fcc2f024660) at matrix.c:2517
   2514   if (!mat->ops->multadd) SETERRQ1(PetscObjectComm((PetscObject)mat),PETSC_ERR_SUP,"No MatMultAdd() for matrix type '%s'",((PetscObject)mat)->type_name);
   2515   ierr = PetscLogEventBegin(MAT_MultAdd,mat,v1,v2,v3);CHKERRQ(ierr);
   2516   ierr = VecLockPush(v1);CHKERRQ(ierr);
-> 2517   ierr = (*mat->ops->multadd)(mat,v1,v2,v3);CHKERRQ(ierr);
   2518   ierr = VecLockPop(v1);CHKERRQ(ierr);
   2519   ierr = PetscLogEventEnd(MAT_MultAdd,mat,v1,v2,v3);CHKERRQ(ierr);
   2520   ierr = PetscObjectStateIncrease((PetscObject)v3);CHKERRQ(ierr);
(lldb) 
frame #9: 0x000000011ad136d0 libpetsc.3.010.dylib`MatMultAdd_HT(N=0x00007fcc2ebfde60, v1=0x00007fcc2f029c60, v2=0x00007fcc2f024660, v3=0x00007fcc2f024660) at htransm.c:24
   21     PetscErrorCode ierr;
   22   
   23     PetscFunctionBegin;
-> 24     ierr = MatMultHermitianTransposeAdd(Na->A,v1,v2,v3);CHKERRQ(ierr);
   25     PetscFunctionReturn(0);
   26   }
   27   
(lldb) 
frame #8: 0x000000011a9d88e5 libpetsc.3.010.dylib`MatMultHermitianTransposeAdd(mat=0x00007fcc2e977260, v1=0x00007fcc2f029c60, v2=0x00007fcc2f024660, v3=0x00007fcc2f024660) at matrix.c:2629
   2626     ierr = MatMultTranspose(mat,w,z);CHKERRQ(ierr);
   2627     ierr = VecDestroy(&w);CHKERRQ(ierr);
   2628     ierr = VecConjugate(z);CHKERRQ(ierr);
-> 2629     ierr = VecWAXPY(v3,1.0,v2,z);CHKERRQ(ierr);
   2630     ierr = VecDestroy(&z);CHKERRQ(ierr);
   2631   }
   2632   ierr = VecLockPop(v1);CHKERRQ(ierr);
(lldb) 
frame #7: 0x000000011a8f33b5 libpetsc.3.010.dylib`VecWAXPY(w=0x00007fcc2f024660, alpha=1, x=0x00007fcc2f024660, y=0x00007fcc2f039260) at rvector.c:795
   792    VecCheckSameSize(x,3,y,4);
   793    VecCheckSameSize(x,3,w,1);
   794    if (w == y) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Result vector w cannot be same as input vector y, suggest VecAXPY()");
-> 795    if (w == x) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Result vector w cannot be same as input vector x, suggest VecAYPX()");
   796    PetscValidLogicalCollectiveScalar(y,alpha,2);
   797  
   798    ierr = PetscLogEventBegin(VEC_WAXPY,x,y,w,0);CHKERRQ(ierr);