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</o:shapelayout></xml><![endif]--></head><body lang=NL-BE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear all,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>When migrating from ITK 3.# to ITK 4.#, I've noticed that the total number of cores are not being read/set properly anymore.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Taking the itkSystemInformation.cxx example in the ...\Modules\Core\Common\test directory and printing mySys.GetNumberOfPhysicalCPU() gives me:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>- 4 (in ITK3.#), which is correct for my quad-core machine<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>- 0 (in ITK4.#), which is wrong<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Could someone provide me a hint as to why I'm seeing this behavior in the first place? Is a global variable set wrong when building ITK?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Furthermore, initializing a filter which supports multithreading and printing<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>myfilter->GetNumberOfThreads()<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>gives me:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>- 4 (in ITK3.#)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>- 1 (in ITK4.#)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I assumed that ITK sets the default number of threads always equal to the total number of cores?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>How can I know if my filter is actually using all my cores?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Kind regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Brecht Heyde<o:p></o:p></span></p></div></body></html>