[Xen-users] CPU load balancing

Andreï V. Fomitchev
2008-07-23T09:39:17Z

Hi all.

I continue to study the XEN possibilities and currently I search a ''CPU
load balancing tool'' which answers the scenario below:
Configuration: using sched-credit command, the 4 DomU are the same weight and
each uses only 15% of CPU.
The balancing tool monitors the DomU CPU loads and if two (or more) consecutive
measures of CPU load equal to 100% of CPU and if the other domains are in Idle
mode, the tool increases the Domain weight and allocates more of CPU. When the
Domain terminated and  "returns" to Idle, the tool returns the Domain
configuration in nominal mode.

1) Because I did not find a response in XEN documentation, my first questions
are "philosophical":
 - this kind of tools is it interesting? Can it provide some improvements of
performances on-the-fly?

2) I found some tools which manage the load balancing of entire clusters. I
think that it is possible to adapt them or their algorithm to CPU balancing but
I think also that I am not the first to meet this issue... Did you read
something about a tool which can answer my needs?

Thank you for your answers.

Best regards,

--
Andreï V. FOMITCHEV




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