Red Hat Enterprise Linux 5 Administration Unleashed

Processors with Hyper-Threading Technology 201LISTING 8.2Continuedcmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pnimonitor ds_cpl cidbogomips : 5592.02processor : 1vendor_id : GenuineIntelcpu family : 15model : 3model name : Genuine Intel(R) CPU 3.20GHzstepping : 3cpu Mhz : 2793.829cache size : 1024 KBphysical id : 0siblings : 2core id : 0cpu cores : 1fdiv_bug : nohlt_bug: nof00f_bug : nocoma_bug : nofpu: yesfpu_exception : yescpuid level : 5wp: yesflags: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mcacmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pnimonitor ds_cpl cidbogomips : 5585.63Similar to the previous example for the multi-core processors, look at the processor,physical id, core id, and cpu cores fields to verify that the system is recognized as onewith HT Technology. The processor count goes from 0 to 1, indicating that, as far as theoperating system is considered, there are two processors to send data to for execution.The physical id is 0 for both, meaning that there is only one physical processor. Thevalue of cpu cores is 1, and the value of core id is 0 for both, meaning that the processoris not a multi-core processor. Thus, the processor must have HT Technology becausethe virtual processor count is 2 with only one processor core.8Hyper-Threading can be disabled at boot-time with a kernel option passed to the kernelusing the GRUB boot loader. This process only disables Hyper-Threading for one bootinstance. It must be repeated on subsequent boots to continue disabling Hyper-Threading.The steps are as follows:1. When the GRUB boot menu appears, use the up and down arrows to select thekernel to boot.