Re: [RESEND][PATCH 0/4] Virtual Machine Time Accounting

From: Avi Kivity
Date: Mon Sep 10 2007 - 08:50:59 EST


Ingo Molnar wrote:
* Laurent Vivier <Laurent.Vivier@xxxxxxxx> wrote:

Ingo, please, could you have a look to these patches ?

The aim of these four patches is to introduce Virtual Machine time accounting.

[PATCH 1/4] as recent CPUs introduce a third running state, after "user" and "system", we need a new field, "guest", in cpustat to store the time used by the CPU to run virtual CPU. Modify /proc/stat to display this new field.

the concept certainly looks sane to me.

The heavy-handed use of #ifdefs uglifies the code to a large degree, but this is not a fundamental problem: since basically all distros have KVM enabled (and lguest benefits from this too), could you just make all this new code unconditional?

I imagine the embedded people will complain... perhaps move all the code to a #ifdef section above with a full implementation and a stub implementation.

--
error compiling committee.c: too many arguments to function

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