Monthly Archives: April 2010

VMware – Checkout if your Server’s Processor Supports VT.

>Virtualization Technology (VT) is a term to a newer processors that improve performance for running a virtual machine by offloading some of the work to the new CPU extensions.
Both AMD and Intel have processors that support this technology,

Here are the step to identify if your system really handle it.

Checkout /proc/cpuinfo file for the information.
* vmx – (intel) – It refers Intel Processor
* svm – (amd) – It refers AMD Processor

You can use egrep to identify if either value exists in the file by running the following command:

egrep -i ‘(vmx|svm)’ /proc/cpuinfo

If your system supports VT, then you’ll see vmx or svm in the list of flags.

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx rdtscp lm constant_tsc nonstop_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm

Note:

1) VT technology can be disabled in your Server’s BIOS, However, You can make sure that it hasn’t been disabled.

The flags in cpuinfo simply mean that your processor supports it.

2) you can see ‘lm‘ in a flags output. It means your processors support 64 bit OS ( Virtual or physical).