6.0

View Processor Information
You can access information about current CPU configuration through the vSphere Client or using the
vSphere SDK.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Procedure
1 In the vSphere Client, select the host and click the Configuration tab.
2 Select Processors.
You can view the information about the number and type of physical processors and the number of
logical processors.
NOTE In hyperthreaded systems, each hardware thread is a logical processor. For example, a dual-core
processor with hyperthreading enabled has two cores and four logical processors.
3 (Optional) You can also disable or enable hyperthreading by clicking Properties.
Enable Hyperthreading
To enable hyperthreading, you must first enable it in your system's BIOS settings and then turn it on in the
vSphere Client. Hyperthreading is enabled by default.
Consult your system documentation to determine whether your CPU supports hyperthreading.
Prerequisites
n
Ensure that your system supports hyperthreading technology.
n
Enable hyperthreading in the system BIOS. Some manufacturers label this option Logical Processor,
while others call it Enable Hyperthreading.
n
Open a vSphere Client connection to a vCenter Server.
Procedure
u
Tturn on hyperthreading for the ESXi host.
a In the vSphere Client, select the host and click the Configuration tab.
b Select Processors and click Properties.
c In the dialog box, you can view hyperthreading status and turn hyperthreading off or on (default).
Hyperthreading is enabled.
Set Hyperthreading Sharing Options for a Virtual Machine
You can specify how the virtual CPUs of a virtual machine can share physical cores on a hyperthreaded
system.
Two virtual CPUs share a core if they are running on logical CPUs of the core at the same time. You can set
this for individual virtual machines.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Chapter 25 Resource Management for Single Hosts
VMware, Inc. 343