You seem to think a hyperthreaded system exposes to the OS 4 "real" and 4 "virtual", slower cores. This is not true, if you have 2 threads executing on a single

You seem to think a hyperthreaded system exposes to the OS 4 "real" and 4 "virtual", slower cores. This is not true, if you have 2 threads executing on a single core at the same time each gets equal attention / performance. Also, hyperthreading really does make a lot of sense on today's hardware. The gap between CPU and memory performance is wide and getting wider each year, when you have a cache miss and your core has several hundred cycles to get its data from memory, you's better have another thread that can keep it busy.