*** old/src/hotspot/os/windows/os_windows.cpp	Fri Oct 20 09:45:07 2017
--- new/src/hotspot/os/windows/os_windows.cpp	Fri Oct 20 09:45:06 2017

*** 718,727 ****
--- 718,735 ----
    return true;
  #endif
  }
  
  int os::active_processor_count() {
+   // User has overridden the number of active processors
+   if (ActiveProcessorCount > 0) {
+     log_trace(os)("active_processor_count: "
+                   "active processor count set by user : %d",
+                   ActiveProcessorCount);
+     return ActiveProcessorCount;
+   }
+ 
    DWORD_PTR lpProcessAffinityMask = 0;
    DWORD_PTR lpSystemAffinityMask = 0;
    int proc_count = processor_count();
    if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
        GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {