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Re: [Xen-users] cpu_weight and cpu_cap

To: "Dylan Martin" <dmartin@xxxxxxxxxxxx>

From: "Todd Deshane" <deshantm@xxxxxxxxx>

Date: Fri, 1 Feb 2008 19:33:29 -0500

Cc: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>

Delivery-date: Fri, 01 Feb 2008 16:34:03 -0800

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On Feb 1, 2008 2:46 PM, Dylan Martin <dmartin@xxxxxxxxxxxx> wrote:

I just did a search for 'cpu_cap' and another for 'cpu_weight' in the
list archives and got zero results. Weird.

Anyway, I have a PV VM that might try and use too many resources. How
can I use 'cpu_cap' and 'cpu_weight' to control that? Is there any
sort of reference doc that describes these settings? Maybe examples?
I can kindof guess what cpu_cap does, but cpu_weight could mean
anything.

Something to look at:

Usage: xm sched-credit -d <Domain> [-w[=WEIGHT]|-c[=CAP]]

Get/set credit scheduler parameters.
-d DOMAIN, --domain=DOMAIN     Domain to modify
-w WEIGHT, --weight=WEIGHT     Weight (int)
-c CAP, --cap=CAP              Cap (int)

OR!

If there is a better way to manage VM prioritisation, please let me
know. Or even more generally, any best practices to keep a VM from
making other VMS too sluggish?

Thanks!
-Dylan

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