HP Rp7410 nPartition Administrator's Guide, Second Edition - Page 219

core that can allow additional efficiencies of processing. For example, a dual-core processor with Hyper-Threading active provides four logical processors, two on each processor core. CAUTION: Some operating systems do not support Hyper-Threading. Problems can occur when running an OS that does not support Hyper-Threading on an nPartition that has Hyper-Threading enabled. NOTE: You must reset an nPartition when changing its Hyper-Threading status. Hyper-Threading will not be enabled or disabled until after the nPartition is reset. Checking the Hyper-Threading Status for an nPartition To check the current Hyper-Threading status for an nPartition: • From the EFI Shell: cpuconfig or cpuconfig threads • From HP-UX: setboot • Using the Enhanced nPartition Commands: parstatus -T Example 7-2 Checking the Hyper-Threading Status for an nPartition # setboot Primary bootpath : 0/0/1/1/0.12.0 HA Alternate bootpath : 0/0/0/1/0 Alternate bootpath : 0/0/0/1/1 Autoboot is ON (enabled) Hyperthreading : ON 1 : OFF (next boot) 2 # 1 The HP-UX setboot command indicates that Hyper-Threading currently is enabled (ON) for the nPartition. 2 The next time the nPartition is booted (after it is reset), Hyper-Threading will be disabled (OFF) for the nPartition. Enabling Hyper-Threading for an nPartition To enable Hyper-Threading, use any of the following methods and then reset the nPartition whose Hyper-Threading status you have changed: • From the EFI Shell: cpuconfig threads on • From HP-UX: setboot -m on • Using the Enhanced nPartition Commands: parmodify -pn -T y, where n is the nPartition number. • Using Partition Manager: Perform the Modify nPartition task and select the Enable Hyper-Threading check box on the Configure Memory tab. You must reset an nPartition after changing its Hyper-Threading status. Enabling and Disabling Hyper-Threading on Dual-Core Intel® Itanium® 2 Processors 219