Re: [Xen-users] Odd number of VCPU and performance impact?

["Niels Dettenbach (Syndicat IT & Internet)" <nd@xxxxxxxxxxxx>]

Am 16. Januar 2015 22:35:09 MEZ, schrieb mad Engineer 
<themadengin33r@xxxxxxxxx>:
>Hi all,
>      Is it good practice to always create vm with even number of VCPU?
A little more correct:
You get more performance and less overhead if you connect/pin cpu cores which 
are hardly interconnected in a CPU system together in favor of cores  which  
are less  interweaved/connected. Most modern CPUs from Intel and AMD has 
"doublettes" of interconnected "cores"  (or "threads")  in their CPUs which  
could  much better  share work then cores/threads which  are in a "wider 
distance"  (on different pairs or  different cpu chassis.


hth a bit
cheerioh,


Niels.
-- 
Niels Dettenbach
Syndicat IT & Internet
http://www.syndicat.com

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