Re: [Xen-users] Home Xen hypervisor for master's project

["Marek Kaszycki" <marek@xxxxxxxxxxx>]

Dnia 20-02-2011 o 15:38:38 Joseph Commisso <commissoje@xxxxxxxxx>  
napisał(a):
> In reply to Marek:
>
> I did not know that about the Phenom and i7 as NOT using ECC, but that
> is good to know.
Phenom does support ECC, i7 does not.

> At the time, I was going to try and decide on which memory to use,
> after I finalized my CPU/motherboard choice.
> That is ok, since I am working now on choosing between the 4100 or
> 6100 series of Opteron.
> I need to find out if the 4100 can do the IOMMU as good as the 6100.
> I have the data sheets on each and I am going to review them now.
> I will then see if I can afford all this with the ECC RAM and all.
4100 does IOMMU just as well as 6100. It is a chipset feature, make sure  
to get a 5670 or 5690 based motherboard, and confirm that it supports  
IOMMU. If 6 cores are enough for you at this point, go for C32 socket  
motherboard (4100). Both C32 and G34 will allow drop-in upgrades to  
Bulldozer assuming BIOS updates are available (so make sure you are  
getting a recent motherboard revision).
> Yes, I thought that the AMD-Vi would be a good choice.
> I would not want to have any obstacles with my VM running Windows for
> home use and I also thought that IOMMU would make it easier for me to
> learn Xen.
And I agree with that sentiment. One caveat: for the time being, you have  
to decide if you want Turbo or Xen. I can't get 2.6.37 or 2.6.38 Xen  
kernels to boot (and I don't want to mess up my configuration, so I'm  
waiting until 2.6.38 comes to the mainstream), and 2.6.32 does not support  
Turbo or later fixes to performance (since I have a rather extensive RAID  
configuration, I want the 2.6.36 fixes to large block handling), so  
currently I'm dual-booting (Windows just to play games). If you are fine  
to make some concessions, you'll be very happy with running the older  
kernel.
Apparently support for Intel turbo is available with 2.6.32, so you can  
get some performance boost (although it's insignificant on Intel CPUs  
you'd likely be considering).
Marek

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