STINNER Victor added the comment: On Windows, os.cpu_count() is currently implemented with:
"GetSystemInfo(&sysinfo); return sysinfo.dwNumberOfProcessors;" https://msdn.microsoft.com/en-us/library/windows/desktop/ms724958(v=vs.85).aspx It seems to return the number of *logical* CPUs: """ dwNumberOfProcessors The number of logical processors in the current group. Note: For information about the physical processors shared by logical processors, call GetLogicalProcessorInformationEx with the RelationshipType parameter set to RelationProcessorPackage (3). """ It seems like you have two physical CPU packages. Maybe the function only returns infos from the first package? ---------- nosy: +haypo _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30581> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com