mkldcsrbsr gives core dump when trying to fill all arrays

[itabhiyanta]

Hi

I am using the mkldcsrbsr routine. I ma using MKL version 10.3 (i have tried with version 11.0 as well). It seems i can call the routine perfectly for the job type = -1. I get the number of blocks correctly but when i call the routine again to fill all the arrays i get a coredump.

Here is the code i am using

rowsAbsr = new int[N_A+1];
  job[0]=0;//CSR to BSR
  job[1]=0;// zero based CSR
  job[2]=0;//zero based bsr
  job[3]=0;
  job[4]=0;
  job[5]=-1;//
  mkl_dcsrbsr(job, &N_A, &m, &ldabsr, nnzsAcsr, colsAcsr, rowsAcsr, nnzsAbsr, colsAbsr, rowsAbsr, &info);
  cout<<"The conversion to BSR for matrix A is "<<info<<"."<<endl;
  cout<<"The request for number of blocks of BSR for matrix A is "<<rowsAbsr[0]<<"."<<endl;
  sizecolsabsr=rowsAbsr[0];
  colsAbsr = new int[rowsAbsr[0]];
  nnzsAbsr = new double[m*m*(rowsAbsr[0])];
  ldabsr=m*m*(rowsAbsr[0]);
    cout<<"ldabsr is calculated as "<<ldabsr<<"."<<endl;
    job[0]=0;//CSR to BSR
    job[1]=0;// zero based CSR
    job[2]=0;//zero based bsr
    job[5]=0;// only row and column arrays for bsr are filled
    mkl_dcsrbsr(job, &N_A, &m, &ldabsr, nnzsAcsr, colsAcsr, rowsAcsr, nnzsAbsr, colsAbsr, rowsAbsr, &info);
    cout<<"The conversion to BSR for matrix A is "<<info<<"."<<endl;
    job[0]=0;//CSR to BSR
    job[1]=0;// zero based CSR
    job[2]=0;//zero based bsr
    job[5]=1;// all arays are filled
    mkl_dcsrbsr(job, &N_A, &m, &ldabsr, nnzsAcsr, colsAcsr, rowsAcsr, nnzsAbsr, colsAbsr, rowsAbsr, &info);
    cout<<"The conversion to BSR for matrix A is "<<info<<"."<<endl;

I had my doubts on ldabsr but as per the documentation available online it seems i am doing the right thing. Could you be so kind to suggest if you spot any obvious error here?

with kind regards

rohit

[Sergey_P_Intel2]

Hi,

Leading dimension ldabsr should be equal to  m*m in your case: in fact, it should describe the length between first elements of two consecutive blocks. 

Regards, Sergey