Can not request iomem region

[hisaltesse]

Hyperthreading should be turned off on any Visualization server host regardless of OS being used. VMware even make a point of recommending it. Thats hardly something that can be blamed on Proxmox. Find a better example.

Could you please provide references supporting your statement?

A few notes:
- HT on pre-nehalem are different than HT from nehalem and newer processors.. (ours at the time was a nehalem 5520).
- Some do not recommend because they do not see measurable performance gains
- Some say that some application not being HT aware could think the server has more processors and overload the system this way causing performance degradation.

Please provide references to your statement so I can see the context.

Typically VMs would not know about HT. Only the Host would. So if the host application (in this case Proxmox apps) is not HT optimized then maybe it explains the load spikes we were having...

 

[Milkwyrm]

actually I may have to eat my words on this.. :/ We had E5520's as well when they were hot off the press's (it actually forced us on to ESXi 4 as the older versions wouldn't run in on our blades with these proc's) VMware told us it would cause problems with Fault tolerance among other things. but a bit of reading seems to show that as no longer a problem..
only issue I see now is as posted here http://vmguy.com/wordpress/index.php/archives/362

Cons

• Processor resources are shared with Hyperthreading enabled
  • Processor resources are shared such as the L2 and L3 caches. This means that the two threads running on the same processor compete for the same resources if they both have high demand for them. This can, in turn, degrade performance.

 

[hisaltesse]

Please can you test with a RHEL6 - does that show the same message?

I would like to report that I see the same issue with Proxmox 1.9 after a close look at the boot screen log, except that the message does not show at the very beginning like on Proxmox 2.0.



See attached screenshot.

 

[bayaoussena]

Re: APEI: Can not request iomem region <00000000bf7b85ea-00000000bf7b85ec> for GARs.

I had this msg APEI: Can not request iomem region <00000000d7ea8160-00000000d7ea8164> for GARs.
I use a super micro model machine under Debain 7.

I have fixed this msg, it does not appear anymore by disabling the ACPI the BIOS.

Hope this could help any,

Baya

I just installed proxmox 2.0rc1 on an Intel Xeon X5650 @ 2.67GHz with 24GB of RAM.
And set the maxroot to 45G
The main storage is on LSI Megaraid RAID10 with 8 drives - total 445GB.


The first boot message I get is:

APEI: Can not request iomem region <00000000bf7b85ea-00000000bf7b85ec> for GARs.
Loading, please wait…
megasas: IOC Init cmd success


Any idea what this means ?

Here is a screenshot.

View attachment 785

Here is the booting video

http://screencast.com/t/imUdnqK1Cqva