Re: 50% slowdown on 2 processor XEN 4.1.3 vs 1 processor system

["Cherry G. Mathew" <cherry.g.mathew%gmail.com@localhost>]

On 26 November 2012 03:00, Harry Waddell 
<waddell%caravaninfotech.com@localhost> wrote:
>
> I just built a new server with 2 x E5-2630 processors and was comparing the
> performance to a nearly identical xen server with 1 x E5-1660 processor and
> found that on a per core basis, instead of being about 50% faster ( as one 
> would expect from the clock speed given that the architecture is nearly 
> identical ), the E5-1660 system is %300 faster, so I ran some benchmarks and 
> started looking for a pattern.
>
> Both systems run NetBSD amd64 6.0-STABLE with xen 4.1.3. The 2
> processor system is running only 1/2 as fast with the XEN3_DOM0 kernel

I hope you realise that NetBSD dom0 is not MP capable ?

-- 
~Cherry