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xen-users
RE: [Xen-users] Re: xentop CPU Usage
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On a SMP system this normally means that you use 300% out
of 800%.
However, note that as far as I understand, Xentop shows
"virtual" CPU (VCPU) usage. So the numbers will vary depending on how you have
configured your DomU with VCPUs and how these run on actual physical CPUs. For
example, if you run two domains which are configured with a single VCPU each,
then it might be that Xentop shows 100% CPU usage for both domains if they run
on different physical CPUs, but only up to 50% each if they run on the same
physical CPU. You can see the assignment of physical CPUs with the xm vcpu-list
command.
Also, I would recommend to use XenMon for measuring CPU
utilization on a Xen system. Have a look at this:
Hi again list,
does anyone know something about this
topic?
We have 4 hosts with 8 CPU Cores each. We have some performance
problems and don't know if it is a CPU Utilization problem. For example one of
the hosts has (accumulated) 300% CPU usage in Xentop (xm top). Does this mean
it's 3 times to much or does it mean it uses 300% of 800% available?
Bye
Thorsten
On 7/15/07, Kyrios
<kyrios@xxxxxxxxx> wrote:
Hi
list,
when xentop says cpu
Usage für domU ist 20% what does that exactly mean on a multi cpu machine.
Does it mean that one of the CPUs is used by 20% or does it mean the domU
uses 20% off all available CPU time?
Bye
Thorsten
--
... black holes are where god divided by
zero.
--
... black holes
are where god divided by zero.
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