Re: [PATCH 4/4] Add a timer to allow the separation of consignedfrom steal time.

[Michael Wolf]

On 02/07/2013 02:46 AM, Glauber Costa wrote:
> On 02/06/2013 10:07 PM, Michael Wolf wrote:
> > On 02/06/2013 08:36 AM, Glauber Costa wrote:
> > > On 02/06/2013 01:49 AM, Michael Wolf wrote:
> > > > Add a helper routine to scheduler/core.c to allow the kvm module
> > > > to retrieve the cpu hardlimit settings.  The values will be used
> > > > to set up a timer that is used to separate the consigned from the
> > > > steal time.
> > > Sorry: What is the business of a timer in here?
> > > Whenever we read steal time, we know how much time has passed and with
> > > that information we can know the entitlement for the period. This breaks
> > > if we suspend, but we know that we suspended, so this is not a problem.
> > I may be missing something, but how do we know how much time has
> > passed?  That is why
> > I had the timer in there.  I will go look again at the code but I
> > thought the data was collected
> > as ticks and passed at random times.  The ticks are also accumulating so
> > we are looking at the
> > difference in the count between reads.....
> They can be collected at random times, but you can of course record the
> time in which it happened.
ok.  Let me add a previous_read field and take out the timer.

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