why are only 4 of 6 cores visable to ESX?

Posted by Arthur Ulfeldt on Server Fault See other posts from Server Fault or by Arthur Ulfeldt
Published on 2010-05-13T18:34:10Z Indexed on 2010/05/13 18:44 UTC
Read the original article Hit count: 210

Filed under:

esx

|

multi-core

I'm trying to determine if this is a hardware problem or a software issue so I thought I would ask the serverfault community if there are any known issues with ESX-4 not recognizing more than 4 cores per socket?

© Server Fault or respective owner

Related posts about esx

connect two ESX hosts on private LAN

as seen on Server Fault - Search for 'Server Fault'
can a PC setup as W2K3 DC manage two ESX hosts connected to physical hub/switch? Services: DNS, DHCP, Domain distributed to host using a hub/switch. NIC2 on each host connected to switch/hub...spanning a virtual network inside each ESX host >>> More
iSCSI connection timing out on ESX 3.5 against a NetApp storage appliance

as seen on Server Fault - Search for 'Server Fault'
I get a timeout on iSCSI on different ESX hosts (3.5) at different times. It is puzzling, as both the ESX hosts as windows and other guests are experiencing timeouts. The iSCSI network is segregated on a private network. Here is an export of vmkiscsid.log from last night: 2010-02-10-12:30:38: iscsid:… >>> More
Installing esx 3.5 on hpblade 460c G7

as seen on Server Fault - Search for 'Server Fault'
I was trying to install ESX 3.5 on hp blade 460c but it fails with error no 'network adapter is detected'. Anybody has work around for this. I also tried to install ESX 4.1, it also had the same problem but in case of 4.1 there is support to add your custom driver while installing. So I added NIC… >>> More
What kind of storage do people actually use for VMware ESX servers?

as seen on Server Fault - Search for 'Server Fault'
VMware and many network evangelists try to tell you that sophisticated (=expensive) fiber SANs are the "only" storage option for VMware ESX and ESXi servers. Well, yes, of course. Using a SAN is fast, reliable and makes vMotion possible. Great. But: Can all ESX/ESXi users really afford SANs? My theory… >>> More
Linked vSphere servers preventing cloning?

as seen on Server Fault - Search for 'Server Fault'
I've currently got a pair of vSphere5 standard servers (physical, not VAs) managing about a hundred ESX 4.1 and 5 hosts in two different physical and logical datacenters. With our last purchase, we bought another vSphere license for the new vS server. I unmanaged all the ESX servers in one datacenter… >>> More

Related posts about multi-core

Programming for Multi core Processors

as seen on Stack Overflow - Search for 'Stack Overflow'
As far as I know, the multi-core architecture in a processor does not effect the program. The actual instruction execution is handled in a lower layer. my question is, Given that you have a multicore environment, Can I use any programming practices to utilize the available resources more effectively… >>> More
Multicore Chips Require OS Rework, Windows Architect Advises

as seen on Devx - Search for 'Devx'
Microsoft's Dave Probert says the OS kernel needs to act more like a hypervisor. >>> More
Multicore Chips Require OS Rework, Windows Architect Advises

as seen on Internet.com - Search for 'Internet.com'
Microsoft's Dave Probert says the OS kernel needs to act more like a hypervisor. >>> More
In a multithreaded app, would a multi-core or multiprocessor arrangement be better?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've read a lot on this topic already both here (e.g., stackoverflow.com/questions/1713554/threads-processes-vs-multithreading-multi-core-multiprocessor-how-they-are or http://stackoverflow.com/questions/680684/multi-cpu-multi-core-and-hyper-thread) and elsewhere (e.g., ixbtlabs.com/articles2/cpu/rmmt-l2-cache… >>> More
Multi core processors... are they really needed?

as seen on Super User - Search for 'Super User'
What things are multi-core processors needed for? I mean what type of things benefit from using multi-core ? Also are there anythings that suffer in performance for using multi-core... ie. they perform better using a single core processor? >>> More