Messages in this thread |  | | Date | Thu, 07 Feb 2013 08:27:35 -0600 | From | Michael Wolf <> | Subject | Re: [PATCH 4/4] Add a timer to allow the separation of consigned from steal time. |
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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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