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xen-devel
Re: [Xen-devel] Calculating real cpu usage of Xen domains correctly!
Anthony Liguori wrote:
Ian Pratt wrote:
Rather than trying to come up with metrics like this, I'd rather have
vm-top show the percentage of a physical CPU that each domain used,
independent of it's allocation.
i.e. total including the idle domain will be #CPUS x 100%.
Right, that's exactly what we want to do. How does one get that
information? We thought that xc_domain_get_cpu_usage() would provide
that information but it doesn't appear too.
(Caution: I have not even looked at this code and am ready to insert
foot in mouth) Can you derive this based on a delta of time stamps,
those timestamps correlating to times when the xen scheduler granted a
domain's virtual cpu a physical cpu and when it was removed from a
physical cpu?
-Andrew Theurer
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