quick Q about logical processors on ESXi 4.1

[huwy]

hi there,

On our Esxi 4.1 server we have 2x quad core processors (xeon e5640)

In the VI Client it lists:

processor sockets = 2

cores per socket = 4

and then the bit I don't understand...

logical processors = 16

Can anyone explain why the logical processors = 16 and not 8? Someone asked me and I didn't know the answer!

Cheers,

Huw

[arturka · Accepted solution]

Hi

HT is enabled that's why you see 16 logical processors insted of 8

Cheers
Artur

Please, don't forget the awarding points for "helpful" and/or "correct" answers.

[gaspipe]

Hyperthreading.

http://ark.intel.com/products/47923

[huwy]

thanks a lot guys

[ChallengeLogic7]

So further to this - does that mean I could only have a maximum of 16 virtual machines having 1 vCPU each on this ESXi host?

Is each VM's CPU bound to 1 'core' ?

[arturka]

So further to this - does that mean I could only have a maximum of 16 virtual machines having 1 vCPU each on this ESXi host?

Is each VM's CPU bound to 1 'core' ?

hi

nope, you can have more than 16 (single vCPU) VMs. Ratio vCPU to pCPU depends on workloads characteristics and pCPU performance

Artur