https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-iterative-direct-solver-in-pardiso/m-p/1156042#M27571 <P>I'm trying to use the iterative-direct solver in Pardiso by changing the default value of iparm[3]. However that didn't work.</P> <P>I have a nonsymmetric matrix, so I set iparm[3] = 61. However, when I print out iparm[19], which contains the CG/CGS diagnostics information, it always says 0. That implies CG wasn't run at all. In my code, when I first solve the linear system, I set phase to be 13. After that, I set the phase to be 23 (so that it doesn't have to factorize every time). The input for my matrix type mtype is 11.</P> <P>I then tried a symmetric positive definite matrix and set iparm[3] = 62. I set mtype to be 2. That didn't work either: iparm[19] returns 0.&nbsp;</P> <P>Did I miss anything?</P> Sun, 15 Jul 2018 04:10:11 GMT Hwang__Carpenter 2018-07-15T04:10:11Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-iterative-direct-solver-in-pardiso/m-p/1156042#M27571 <P>I'm trying to use the iterative-direct solver in Pardiso by changing the default value of iparm[3]. However that didn't work.</P> <P>I have a nonsymmetric matrix, so I set iparm[3] = 61. However, when I print out iparm[19], which contains the CG/CGS diagnostics information, it always says 0. That implies CG wasn't run at all. In my code, when I first solve the linear system, I set phase to be 13. After that, I set the phase to be 23 (so that it doesn't have to factorize every time). The input for my matrix type mtype is 11.</P> <P>I then tried a symmetric positive definite matrix and set iparm[3] = 62. I set mtype to be 2. That didn't work either: iparm[19] returns 0.&nbsp;</P> <P>Did I miss anything?</P> Sun, 15 Jul 2018 04:10:11 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-iterative-direct-solver-in-pardiso/m-p/1156042#M27571 Hwang__Carpenter 2018-07-15T04:10:11Z