Messages in this thread |  | | Date | Wed, 6 Mar 2013 14:20:36 +0100 | Subject | Re: [PATCH 0/4] Alter steal-time reporting in the guest | From | Frederic Weisbecker <> |
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2013/2/19 Marcelo Tosatti <mtosatti@redhat.com>: > On Mon, Feb 18, 2013 at 05:43:47PM +0100, Frederic Weisbecker wrote: >> 2013/2/5 Michael Wolf <mjw@linux.vnet.ibm.com>: >> > In the case of where you have a system that is running in a >> > capped or overcommitted environment the user may see steal time >> > being reported in accounting tools such as top or vmstat. This can >> > cause confusion for the end user. >> >> Sorry, I'm no expert in this area. But I don't really understand what >> is confusing for the end user here. > > I suppose that what is wanted is to subtract stolen time due to 'known > reasons' from steal time reporting. 'Known reasons' being, for example, > hard caps. So a vcpu executing instructions with no halt, but limited to > 80% of available bandwidth, would not have 20% of stolen time reported.
Ok, that's a good explanation to add to make that subtle steal time issue clearer.
> > But yes, a description of the scenario that is being dealt with, with > details, is important.
Yeah especially for such a significant user ABI change.
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