On Mon, 2016-01-18 at 14:12 +0000, George Dunlap wrote: > [Changing the title to align with the current topic] > > Load balancing only happens on a reset event; and the frequency of > reset > events will be CREDIT_INIT / (% utilization); so for a system at 1% > utilization that would be once every second. Is that the kind of > number > you were seeing? Or were you actually seeing idle runqueues not > having > anything pushed to them *during* a balance for some reason? > As I said, I need to recheck... but yes, this could be the cause of my "issue".
In fact, since I was reading the load from the toolstack (that was one of the purposes of the whole thing), it's quite likely that I was seeing non-updated values because the load balance hadn't run since a while. I'll keep this in mind when revisiting that work, and try to cook a patch that avoid setting the timer when the idle vcpu is returned, and see how it goes. Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
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