Re: Run "guest CPUs" under Linux? I need your help
Craig Small dijo [Fri, Sep 12, 2008 at 12:26:41PM +1000]:
> Hello,
> I'm the Debian maintainer for procps, which is the package that gives
> you things like ps,killall and top. The latest version of procps now
> handles all 7 cpu numbers, so all is well?
>
> Actually no, since kernel 2.6.24 there is a 9th CPU field! It's called
> a guest field and is the amount of time the CPU spends running a virtual
> CPU. My problem is, its not defined too well. I get 0 all the time as
> I run a standard Linux installation.
>
> What am I looking for?
> * Someone who knows that this field means, or
> * Someone who can spend some time with me checking some things and
> has something in that field.
Ok. I qualify for the second case only ;-)
> Look for the 9th number in your cpu lines in /proc/stat
> $ grep cpu /proc/stat
> cpu 10056425 163340 3340784 167972553 1183037 103876 31053 0 0
> cpu0 10056425 163340 3340784 167972553 1183037 103876 31053 0 0
>
> That second 0 right at the end is my "guest cpu" time. If you don't
> have 0 and got some time, can you reply back? I'll probably just
> need some greps of a few lines in /proc Ideally you have a rather large
> number there, or at least something that is in the same order as the
> others.
This is at a quad-core machine running 15 kvm hosts:
0 gwolf@pulpo[1]~$ grep cpu /proc/stat
cpu 7295971 94 4705482 104732978 112016 1477 196473 0 5259532
cpu0 1990863 26 1266385 24541064 26959 474 51863 0 1443897
cpu1 2011231 29 1290433 26663687 29237 349 57570 0 1438583
cpu2 1658982 21 1080896 26900462 27728 323 42251 0 1198182
cpu3 1634894 16 1067767 26627764 28091 330 44788 0 1178868
0 gwolf@pulpo[2]~$ uname -a
Linux pulpo 2.6.26-1-amd64 #1 SMP Thu Aug 28 11:13:42 UTC 2008 x86_64 GNU/Linux
So... Anything you might want me to run, please ask.
--
Gunnar Wolf - gwolf@gwolf.org - (+52-55)5623-0154 / 1451-2244
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