Ifort -parallel option on Mac Pro 12-core ?

[hghu]

Problem:

Code runs very well on a Mac Pro with 8-core, include ifort -parallel option.

We get a new Mac Pro with 12-core recently, ifort -parallel option doesn't work. Code tested runs goodon one core.

Error:

forrtl: severe (174): SIGSEGV, segmentation fault occurred

% ifort -V

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

Copyright (C) 1985-2009 Intel Corporation. All rights reserved.

% ifort -VIntel Fortran Intel 64 Compiler Professional for applications running on Intel 64,Version 11.1 Build 20090827 Package ID: m_cprof_p_11.1.067Copyright (C) 1985-2009 Intel Corporation.

Machine:

Mac Pro 2 x 6-core intel xeon 2.66 Ghz, 24 GB memory.

Any idea? Thanks

Haoguo

[TimP]

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.
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?