https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1464164#M34330 <P>Hi Bill Adams,</P><P>&nbsp;</P><P>Thanks for posting in Intel Communities.</P><P>&nbsp;</P><P>Could you please try specifying the iparm[12] to get better accuracy? Please find the below link for more details regarding the significance of iparm[12] and other iparm components.</P><P><A href="https://www.intel.com/content/www/us/en/develop/documentation/onemkl-developer-reference-c/top/sparse-solver-routines/onemkl-pardiso-parallel-direct-sparse-solver-iface/pardiso-iparm-parameter.html" rel="noopener noreferrer" target="_blank">https://www.intel.com/content/www/us/en/develop/documentation/onemkl-developer-reference-c/top/sparse-solver-routines/onemkl-pardiso-parallel-direct-sparse-solver-iface/pardiso-iparm-parameter.html</A></P><P>&nbsp;</P><P>In addition, could you please let us know your use case and OS details you are using? It will help us in understanding the issue better and helps you accordingly.</P><P>&nbsp;</P><P>Thanks &amp; Regards,</P><P> Varsha</P><BR /> Fri, 10 Mar 2023 11:04:49 GMT VarshaS_Intel 2023-03-10T11:04:49Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1463664#M34326 <P>hi,</P> <P>i want to get high accuracy solutions for symmetric indefinite matrix equations, mtype = -2, using direct solver parallel pardiso.</P> <P>i know to use iparm(8) = negative for extended precision but what other values of iparm vector are best in this case.</P> <P>thank you for your suggestions.</P> <P>&nbsp;</P> <P>&nbsp;</P> <P>&nbsp;</P> Thu, 09 Mar 2023 08:44:10 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1463664#M34326 bill_tm 2023-03-09T08:44:10Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1464164#M34330 <P>Hi Bill Adams,</P><P>&nbsp;</P><P>Thanks for posting in Intel Communities.</P><P>&nbsp;</P><P>Could you please try specifying the iparm[12] to get better accuracy? Please find the below link for more details regarding the significance of iparm[12] and other iparm components.</P><P><A href="https://www.intel.com/content/www/us/en/develop/documentation/onemkl-developer-reference-c/top/sparse-solver-routines/onemkl-pardiso-parallel-direct-sparse-solver-iface/pardiso-iparm-parameter.html" rel="noopener noreferrer" target="_blank">https://www.intel.com/content/www/us/en/develop/documentation/onemkl-developer-reference-c/top/sparse-solver-routines/onemkl-pardiso-parallel-direct-sparse-solver-iface/pardiso-iparm-parameter.html</A></P><P>&nbsp;</P><P>In addition, could you please let us know your use case and OS details you are using? It will help us in understanding the issue better and helps you accordingly.</P><P>&nbsp;</P><P>Thanks &amp; Regards,</P><P> Varsha</P><BR /> Fri, 10 Mar 2023 11:04:49 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1464164#M34330 VarshaS_Intel 2023-03-10T11:04:49Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1464521#M34332 <P>Hi Varsha</P> <P>On Windows 10 using mkl 2023 and interested in accuarcy of sparse solvers for indefinite and positive definite symmetric matrices.</P> <P>I will use your suggestion of iparm[12]. Is there anything else you suggest.</P> <P>Thank you.</P> <P>&nbsp;</P> Sat, 11 Mar 2023 06:50:56 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1464521#M34332 bill_tm 2023-03-11T06:50:56Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1466513#M34355 <P>Hi Bill Adams,</P><P><BR /></P><P>Could you please let us know if you are able to get the expected accuracy using iparm[12]? If not, could you please provide us with the complete sample reproducer code to investigate more on your issue more?</P><P><BR /></P><P>Thanks&nbsp;&amp; Regards,</P><P>Varsha</P><BR /> Thu, 16 Mar 2023 09:20:18 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1466513#M34355 VarshaS_Intel 2023-03-16T09:20:18Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1466546#M34357 <P>Hi Varsha</P> <P>&nbsp;</P> <P>your suggestion is good and the accuracy is good thank you.</P> <P>&nbsp;</P> <P>&nbsp;</P> Thu, 16 Mar 2023 11:01:50 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1466546#M34357 bill_tm 2023-03-16T11:01:50Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1466963#M34365 <P>Hi Bill Adams,</P><P><BR /></P><P>Glad to know that your issue is resolved. Thanks for accepting our solution. This thread will no longer be monitored by Intel. If you need any other information, please start a new question.</P><P><BR /></P><P>Have a Good Day!</P><P><BR /></P><P>Thanks &amp; Regards,</P><P>Varsha </P><BR /> Fri, 17 Mar 2023 08:14:44 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Recommended-pardiso-settings-for-high-accuracy-solutions/m-p/1466963#M34365 VarshaS_Intel 2023-03-17T08:14:44Z