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Testbed Support for GridPP member institutes > [mailto:[log in to unmask]] On Behalf Of Andrew McNab said: > Yes to all of the above. I'm not arguing against > hyperthreading - just > saying it's not true that "hyperthreaded CPUs and cores are > effectively the same thing". The question is whether they're effectively the same for the purpose of measuring resource usage, i.e. that you calculate the HEPSPEC by running cores*hyperthreads copies of the benchmark, and then "charge" the jobs for using HEPSPEC*time resources (assuming that the system is full of jobs at the time). If you think that's wrong, what do you think it should be? Stephen