https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947860#M15024 <DIV>Hello everone!</DIV> <DIV></DIV> <DIV>I have two questions about DSS solver.</DIV> <DIV>1. Why is the first use of dss_reorder( ) VERY SLOW? For a matrix 1300x1300 with only 5000nnz I had to stop my program because it hunged (even for a matrix of size 7 it takes about a second or two to reorder) Is this normal, or I am doing some kind of a mistake....</DIV> <DIV></DIV> <DIV>2. What could possibly be a couse of an error "MKL-DSS-DSS-Error, An unclassifiable error occured"? I get it while using several time the routine for solving which is almost identical to an example program in dss_sym. It always crashes on reordering routine and it occures in unpredictable moments. This happens during solving the same system in each routine call.</DIV> <DIV></DIV> <DIV>Thank you in advance for any answer</DIV> <DIV></DIV> <DIV>Peter</DIV> <DIV></DIV> Tue, 20 Jul 2004 06:56:40 GMT Deleted_U_Intel 2004-07-20T06:56:40Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947860#M15024 <DIV>Hello everone!</DIV> <DIV></DIV> <DIV>I have two questions about DSS solver.</DIV> <DIV>1. Why is the first use of dss_reorder( ) VERY SLOW? For a matrix 1300x1300 with only 5000nnz I had to stop my program because it hunged (even for a matrix of size 7 it takes about a second or two to reorder) Is this normal, or I am doing some kind of a mistake....</DIV> <DIV></DIV> <DIV>2. What could possibly be a couse of an error "MKL-DSS-DSS-Error, An unclassifiable error occured"? I get it while using several time the routine for solving which is almost identical to an example program in dss_sym. It always crashes on reordering routine and it occures in unpredictable moments. This happens during solving the same system in each routine call.</DIV> <DIV></DIV> <DIV>Thank you in advance for any answer</DIV> <DIV></DIV> <DIV>Peter</DIV> <DIV></DIV> Tue, 20 Jul 2004 06:56:40 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947860#M15024 Deleted_U_Intel 2004-07-20T06:56:40Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947861#M15025 <DIV>Peter,</DIV> <DIV></DIV> <DIV>First of all, thanks for trying out DSS. </DIV> <DIV></DIV> <DIV>It is difficult to diagnose this issue with the information given. DSS should be fast and should reorder that matrix efficiently.</DIV> <DIV></DIV> <DIV>I would suggest reporting this to Intel Premier support with a suitable example.</DIV> <DIV></DIV> <DIV>Bruce</DIV> Tue, 27 Jul 2004 01:21:13 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947861#M15025 Intel_C_Intel 2004-07-27T01:21:13Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947862#M15026 <DIV>Hi Peter </DIV> <DIV></DIV> <DIV>The DSS solver is based on PARDISO and I am one of the authors. Do you haveany dense rows or columns in the sparse systems. This might be a problem in theMKL Pardiso Version.</DIV> <DIV></DIV> <DIV>I am interested in the problem. Could you please send me the system?</DIV> <DIV></DIV> <DIV>Olaf Schenk</DIV> <DIV>CS Department</DIV> <DIV>University of Basel</DIV> <DIV>Switzerland</DIV> Thu, 12 Aug 2004 22:52:57 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Slow-DSS-solver/m-p/947862#M15026 basel 2004-08-12T22:52:57Z