Messages in this thread | | | Date | Wed, 29 Aug 2018 14:45:03 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] sched/schedutil : optimize utilization scaling for guest kernel |
| |
On Wed, Aug 29, 2018 at 10:51:42AM +0200, Vincent Guittot wrote: > Scaling the utilization of CPUs with irq util_avg in schedutil doesn't give > any benefit and just waste CPU cycles when irq time is not accounted but > only steal time. > Add an internal _scale_irq_capacity() for scale_rt_capacity but scale > cpu utilization in schedutil only if we are accounting irq time.
This makes a mess of things; also it doesn't really do what it says.
Even if we have CONFIG_IRQ_TIME_ACCOUNTING, that doesn't mean we do it, just that it is capable.
| |