https://community.intel.com/t5/Intel-Fortran-Compiler/Has-Intel-Fortran-Compiler-8-1-SLOW-READ-problem-been-fixed-in-9/m-p/765727#M20017 <DIV></DIV> <DIV>Hi, </DIV> <DIV></DIV> <DIV>Last year we purchased the Intel Fortran 8.1 Fortran compiler for the Itanium-2 64-bit platform. We were surprised and dismayed to learn that the code generated would actually perform worse than our 32-bit Fortran code. We traced the problem to reads from disk. After a lengthy exchange with Intel's technical support (spanning months) we finally got them to admit that this was the case. The reason given was that development/poor performing I/O libraries were linked into the 8.1 release version. Since no update or patch was to be produced they finally indicated that we could havea refund. </DIV> <DIV></DIV> <DIV>Now our project is at a point where we need to know if the slow read problem has been fixed with the 9.0 release version. Is there anyone out there who has any input into this subject one way or the other? It would be great if Intel tech support could verify it.</DIV> <DIV></DIV> <DIV>Thankx much,</DIV> <DIV>Mark </DIV> <DIV></DIV> <DIV></DIV> Sat, 18 Feb 2006 05:16:51 GMT yood 2006-02-18T05:16:51Z https://community.intel.com/t5/Intel-Fortran-Compiler/Has-Intel-Fortran-Compiler-8-1-SLOW-READ-problem-been-fixed-in-9/m-p/765727#M20017 <DIV></DIV> <DIV>Hi, </DIV> <DIV></DIV> <DIV>Last year we purchased the Intel Fortran 8.1 Fortran compiler for the Itanium-2 64-bit platform. We were surprised and dismayed to learn that the code generated would actually perform worse than our 32-bit Fortran code. We traced the problem to reads from disk. After a lengthy exchange with Intel's technical support (spanning months) we finally got them to admit that this was the case. The reason given was that development/poor performing I/O libraries were linked into the 8.1 release version. Since no update or patch was to be produced they finally indicated that we could havea refund. </DIV> <DIV></DIV> <DIV>Now our project is at a point where we need to know if the slow read problem has been fixed with the 9.0 release version. Is there anyone out there who has any input into this subject one way or the other? It would be great if Intel tech support could verify it.</DIV> <DIV></DIV> <DIV>Thankx much,</DIV> <DIV>Mark </DIV> <DIV></DIV> <DIV></DIV> Sat, 18 Feb 2006 05:16:51 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/Has-Intel-Fortran-Compiler-8-1-SLOW-READ-problem-been-fixed-in-9/m-p/765727#M20017 yood 2006-02-18T05:16:51Z https://community.intel.com/t5/Intel-Fortran-Compiler/Has-Intel-Fortran-Compiler-8-1-SLOW-READ-problem-been-fixed-in-9/m-p/765728#M20018 Mark,<BR /><BR />The issue you reported (#277864) was indeed fixed in 9.0. It wasn't actually the file read, but conversion from text to binary for formatted input that was the problem.<BR /><BR />You may find that the /assume:buffered_io option gives you further performance improvement.<P>Message Edited by Steve_Lionel on <SPAN class="date_text">02-17-2006</SPAN> <SPAN class="time_text">05:04 PM</SPAN></P> Sat, 18 Feb 2006 06:01:39 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/Has-Intel-Fortran-Compiler-8-1-SLOW-READ-problem-been-fixed-in-9/m-p/765728#M20018 Steven_L_Intel1 2006-02-18T06:01:39Z