https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Threading-problem/m-p/973847#M16937 <DIV>Hi, I am using MKL 6 with the Intel C++ compilter, 7.0 on Windows 2000. I am writing a multi threaded program, and each thread makes thousands of calls to DftiComputeForward(). I use the _beginthread() function for the threading.</DIV> <DIV></DIV> <DIV>In the scenario above, all is well. However, if I use the Visual C++ 6.0 compiler, instead of the intel one, some of the threads run fine, but at a certain point in my program, it crashes and gives the following message:</DIV> <DIV></DIV> <DIV>"abort: stack overlapping detected!<BR />Perhaps you are using over 2MB of stack with unsupported pthreads library that<BR />was built without FLOATING_STACKS defined? This is the default for the<BR />static pthreads library and many unsupported operating systems."</DIV> <DIV></DIV> <DIV>I have no idea what FLOATING_STACKS means. But this leads me to believe that the intel compiler uses it's own threading library which works ok, and VC++ uses a different one which doesn't work.</DIV> <DIV></DIV> <DIV>Has anyone seen this before? The reason I am concerned with getting it to compile with both compilers is that I may have to port it to Linux some day. Is there any sort of setting that I have to set in order to get this problem to go away? Even though it's a threading problem, since it's happening with the MKL functions, I figured someone here might know.</DIV> <DIV></DIV> <DIV>I'm guessing I have to set something relating to FLOATING_STACKS somewhere, but I have no idea where that is.</DIV> <DIV></DIV> <DIV>thanks</DIV> <DIV></DIV> Wed, 21 Jan 2004 01:53:52 GMT Intel_C_Intel 2004-01-21T01:53:52Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Threading-problem/m-p/973847#M16937 <DIV>Hi, I am using MKL 6 with the Intel C++ compilter, 7.0 on Windows 2000. I am writing a multi threaded program, and each thread makes thousands of calls to DftiComputeForward(). I use the _beginthread() function for the threading.</DIV> <DIV></DIV> <DIV>In the scenario above, all is well. However, if I use the Visual C++ 6.0 compiler, instead of the intel one, some of the threads run fine, but at a certain point in my program, it crashes and gives the following message:</DIV> <DIV></DIV> <DIV>"abort: stack overlapping detected!<BR />Perhaps you are using over 2MB of stack with unsupported pthreads library that<BR />was built without FLOATING_STACKS defined? This is the default for the<BR />static pthreads library and many unsupported operating systems."</DIV> <DIV></DIV> <DIV>I have no idea what FLOATING_STACKS means. But this leads me to believe that the intel compiler uses it's own threading library which works ok, and VC++ uses a different one which doesn't work.</DIV> <DIV></DIV> <DIV>Has anyone seen this before? The reason I am concerned with getting it to compile with both compilers is that I may have to port it to Linux some day. Is there any sort of setting that I have to set in order to get this problem to go away? Even though it's a threading problem, since it's happening with the MKL functions, I figured someone here might know.</DIV> <DIV></DIV> <DIV>I'm guessing I have to set something relating to FLOATING_STACKS somewhere, but I have no idea where that is.</DIV> <DIV></DIV> <DIV>thanks</DIV> <DIV></DIV> Wed, 21 Jan 2004 01:53:52 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Threading-problem/m-p/973847#M16937 Intel_C_Intel 2004-01-21T01:53:52Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Threading-problem/m-p/973848#M16938 <P>Nevermind, I got it. The second argument to the _beginthread() function is the stack size. I just set it to some huge number like 100 million and it all worked fine. sorry about that, thanks</P> <P>-matt</P> <P></P> <DIV></DIV> Wed, 21 Jan 2004 02:14:55 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Threading-problem/m-p/973848#M16938 Intel_C_Intel 2004-01-21T02:14:55Z