Hi all, First thanks for your comments. I still have the same problem but i agree with you all that reading a matrix from a file is not parallel programming. So i wonder if you can recommend an efficient and faster way to read a 30000x30000 sparse matrix where i got those values from my fortran code on aeroacoustics similation. I tried calling MatSetValues as i attached below. I found that way from the ex11f.F in the matrix examples and not sure if it is appropriate for my situation.
! do, i=1,n ! do, j=1,n ! value=Aval(i,j) ! if(value .ne. 0)then ! l=i-1 ! m=j-1 ! call MatSetValues(A,1,l,1,m,value,INSERT_VALUES,ierr) ! endif ! enddo ! enddo Thanks soooooo much EVRIM
