Why does Linux's scheduler put two threads onto the same physical core on processors with HyperThreading?

Question

I\'ve read in multiple places that Linux\'s default scheduler is hyperthreading aware on multi-core machines, meaning that if you have a machine with 2 real cor

Answer 1

Quoting your experience with two additional processors that seemed to work correctly, the i7-2600 and Xeon E5-1620; This could be a long-shot but how about a CPU microcode update? It could include something to fix the problem if it's internal CPU behaviour.

Intel CPU Microcode Downloads: http://intel.ly/1aku6ak

Also see here: https://wiki.archlinux.org/index.php/Microcode