Solved

hypherthreading of CPU

Posted on 2013-11-05
4
313 Views
Last Modified: 2016-11-23
We have an ol dell server PE2950. It is compatiable with esx5.1.
I know enabling the hypherthreading double the cpus.
Is there any advantage of doing that? Will it penalise the CPU's performance?
0
Comment
Question by:sara2000
4 Comments
 
LVL 15

Expert Comment

by:Skyler Kincaid
ID: 39626278
It really depends on the number of machines that you are planning to run on the server and if you are going to dedicate cores to them. Hyperthreading will allow the ESXi host to see the physical cores as each having multiple logical cores. You probably won't see any difference at all in the performance. ESXi is still going to allocate the resources in almost the same way even if hyperthreading is enabled.

The only time you will probably run into issues is if you dedicate two logical cores on the same physical processor to two different machines. This would be the same as giving the one machine one physical core.

Here is a VMware write up about it: (for an older version but the concept holds true)

http://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.resourcemanagement.doc_40/managing_cpu_resources/c_hyperthreading_and_esx_esxi.html
0
 
LVL 34

Expert Comment

by:Seth Simmons
ID: 39626425
you can also look at the 5.1 best practices guide
p. 20 discusses hyper threading

http://www.vmware.com/pdf/Perf_Best_Practices_vSphere5.1.pdf
0
 
LVL 120
ID: 39626601
There is no penalty.
0
 
LVL 20

Accepted Solution

by:
compdigit44 earned 500 total points
ID: 39636248
The only time i have heard of performance problems is when you allocate more cpu's to a guest then you have cores on your host.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Will try to explain how to use the VMware feature TAGs in the VMs and create Veeam Backup Jobs using TAGs. Since this article is too long, I will create second article for the Veeam tasks.
In this article, I will show you HOW TO: Install VMware Tools for Windows on a VMware Windows virtual machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, using the VMware Host Client. The virtual machine has Windows Server 2016 instal…
Teach the user how to join ESXi hosts to Active Directory domains Open vSphere Client: Join ESXi host to AD domain: Verify ESXi computer account in AD: Configure permissions for domain user in ESXi: Test domain user login to ESXi host:
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…

680 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question