nPartition Administrator's Guide, Second Edition

4. Reboot the nPartition using the REBOOT command.
Whenever changing processor configurations you must reboot the corresponding nPartition
to allow the configuration changes to take place.
5. Exit the console and service processor interfaces if finished using them.
To exit the BCH environment type ^B (Control-B); this exits the nPartition console and
returns to the service processor Main Menu. To exit the service processor, type X at the Main
Menu.
Procedure 7-13 Configuring and Deconfiguring Processors (EFI Shell)
From the EFI Shell environment, use the cpuconfig command to configure or deconfigure
processors in the local nPartition. The EFI Shell is available only on HP Integrity systems.
1. Access the EFI Shell environment for the nPartition whose processors you want to configure
or deconfigure.
Login to the service processor (MP or GSP) and enter CO to access the Console list. Select
the nPartition console.
When accessing the console, confirm that you are at the EFI Boot Manager menu (the main
EFI menu). If at another EFI menu, select the Exit option from the sub-menus until you
return to the screen with the EFI Boot Manager heading.
From the EFI Boot Manager menu, select the EFI Shell menu option to access the EFI Shell
environment.
2. Enter the cpuconfig command with no arguments to list the current processor
configurations for all cells assigned to the local nPartition.
3. Use the cpuconfig command to change processor configurations for any of the cells assigned
to the local nPartition.
cpuconfig cell cpu off deconfigures the specified processor (cpu) on the specified cell
(cell).
cpuconfig cell cpu on configures the processor on the cell.
Enter help cpuconfig for more details on configuring and deconfiguring processors from
the EFI Shell.
4. Reboot the nPartition using the reset command.
Whenever changing processor configurations you must reboot the corresponding nPartition
to allow the configuration changes to take place.
5. Exit the console and service processor interfaces if finished using them.
To exit the EFI environment type ^B (Control-B); this exits the nPartition console and returns
to the service processor Main Menu. To exit the service processor, type X at the Main Menu.
Enabling and Disabling Hyper-Threading on Dual-Core Intel® Itanium® 2
Processors
nPartitions with dual-core Intel® Itanium® 2 processors support Hyper-Threading.
Hyper-Threading provides the ability for processors to create a second logical CPU on a single
218 Managing Hardware Resources