How to setup Hyperthreading?
Abstract[edit]
Contents
The Hyperthreading is an 11.31 feature and it is only supported on Integrity/Itanium servers.
Setboot Command[edit]
The setboot command gives the ability to turn on/off, and check if this feature is enabled or not.
# 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
The HP-UX setboot command indicates that Hyper-Threading currently is enabled (ON) for the server.
The next time the server is booted (after it is reset), Hyper-Threading will be disabled (OFF) for the server.
Enabling Hyper-Threading for a server or partition[edit]
To enable Hyper-Threading, use any of the following methods and then reset the server 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.
Shell> cpuconfig threads cpuconfig: Threads are turned off. Shell> Shell> cpuconfig threads on 2 cpuconfig: Threads will be on after a reset. Shell>
The EFI Shell cpuconfig threads command indicates that Hyper-Threading currently is disabled (turned off) for the nPartition.
This EFI Shell command configures Hyper-Threading to be enable after the nPartition is reset.
Disabling Hyper-Threading for a server or partition[edit]
To disable Hyper-Threading, use any of the following methods and then reset the server whose Hyper-Threading status you have changed:
From the EFI Shell: cpuconfig threads off
From HP-UX: setboot -m off
Using the Enhanced nPartition Commands: parmodify -pn -T n, where n is the nPartition number.
Using Partition Manager: Perform the Modify nPartition task and deselect the Enable Hyper-Threading check box on the Configure Memory tab.
You must reset the server or partition after changing its Hyper-Threading status.
References[edit]
Authors[edit]
- Luis Nassar
- Editor : Scott Marer