> Is a hyperthreading CPU identical to a second CPU from the software's > standpoint? If not, what are the differences? I am not sure, but it is some how detected as 2 CPUs FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 6 cpu3 (AP): APIC ID: 7 Olivier