https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Ifort-parallel-option-on-Mac-Pro-12-core/m-p/794073#M418 <DIV>Problem:</DIV><SPAN style="white-space: pre;"> </SPAN>Code runs very well on a Mac Pro with 8-core, include ifort -parallel option.<DIV><SPAN style="white-space: pre;"> </SPAN>We get a new Mac Pro with 12-core recently, ifort -parallel option doesn't work. Code tested runs good<SPAN style="white-space: pre;"></SPAN>on one core.</DIV><DIV></DIV><DIV></DIV><DIV>Error:</DIV><DIV> <SPAN style="white-space: pre;"> </SPAN>forrtl: severe (174): SIGSEGV, segmentation fault occurred</DIV><DIV></DIV><DIV></DIV><DIV><DIV id="_mcePaste">% ifort -V</DIV><DIV id="_mcePaste"><SPAN style="white-space: pre;"> </SPAN>Intel Fortran Intel 64 Compiler Professional for applications running on Intel 64, Version 11.1 Build 20090827 Package ID: m_cprof_p_11.1.067</DIV><DIV id="_mcePaste"><SPAN style="white-space: pre;"> </SPAN>Copyright (C) 1985-2009 Intel Corporation. All rights reserved.</DIV><DIV></DIV><SPAN style="white-space: pre;"> </SPAN>% ifort -VIntel Fortran Intel 64 Compiler Professional for applications running on Intel 64,<SPAN style="white-space: pre;"></SPAN>Version 11.1 Build 20090827 Package ID: m_cprof_p_11.1.067Copyright (C) 1985-2009 Intel <SPAN style="white-space: pre;"> </SPAN>Corporation.</DIV><DIV></DIV><DIV></DIV><DIV>Machine:</DIV><DIV><SPAN style="white-space: pre;"> </SPAN>Mac Pro 2 x 6-core intel xeon 2.66 Ghz, 24 GB memory.</DIV><DIV></DIV><DIV></DIV><DIV></DIV><DIV>Any idea? Thanks</DIV><DIV></DIV><DIV>Haoguo</DIV><DIV></DIV><DIV></DIV> Tue, 05 Jul 2011 19:55:07 GMT hghu 2011-07-05T19:55:07Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Ifort-parallel-option-on-Mac-Pro-12-core/m-p/794073#M418 <DIV>Problem:</DIV><SPAN style="white-space: pre;"> </SPAN>Code runs very well on a Mac Pro with 8-core, include ifort -parallel option.<DIV><SPAN style="white-space: pre;"> </SPAN>We get a new Mac Pro with 12-core recently, ifort -parallel option doesn't work. Code tested runs good<SPAN style="white-space: pre;"></SPAN>on one core.</DIV><DIV></DIV><DIV></DIV><DIV>Error:</DIV><DIV> <SPAN style="white-space: pre;"> </SPAN>forrtl: severe (174): SIGSEGV, segmentation fault occurred</DIV><DIV></DIV><DIV></DIV><DIV><DIV id="_mcePaste">% ifort -V</DIV><DIV id="_mcePaste"><SPAN style="white-space: pre;"> </SPAN>Intel Fortran Intel 64 Compiler Professional for applications running on Intel 64, Version 11.1 Build 20090827 Package ID: m_cprof_p_11.1.067</DIV><DIV id="_mcePaste"><SPAN style="white-space: pre;"> </SPAN>Copyright (C) 1985-2009 Intel Corporation. All rights reserved.</DIV><DIV></DIV><SPAN style="white-space: pre;"> </SPAN>% ifort -VIntel Fortran Intel 64 Compiler Professional for applications running on Intel 64,<SPAN style="white-space: pre;"></SPAN>Version 11.1 Build 20090827 Package ID: m_cprof_p_11.1.067Copyright (C) 1985-2009 Intel <SPAN style="white-space: pre;"> </SPAN>Corporation.</DIV><DIV></DIV><DIV></DIV><DIV>Machine:</DIV><DIV><SPAN style="white-space: pre;"> </SPAN>Mac Pro 2 x 6-core intel xeon 2.66 Ghz, 24 GB memory.</DIV><DIV></DIV><DIV></DIV><DIV></DIV><DIV>Any idea? Thanks</DIV><DIV></DIV><DIV>Haoguo</DIV><DIV></DIV><DIV></DIV> Tue, 05 Jul 2011 19:55:07 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Ifort-parallel-option-on-Mac-Pro-12-core/m-p/794073#M418 hghu 2011-07-05T19:55:07Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Ifort-parallel-option-on-Mac-Pro-12-core/m-p/794074#M419 This question might get more timely expert attention on the linux/Mac Fortran forum or with submission of a reproducer in a problem report on your premier.intel.com account.<BR />Among the questions you left unanswered: Did you check whether an increase in stack limit is required, possibly on account of attempting to run more threads? Thu, 07 Jul 2011 12:29:29 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Ifort-parallel-option-on-Mac-Pro-12-core/m-p/794074#M419 TimP 2011-07-07T12:29:29Z