Re: [PATCH] sched/fair: fix rework of find_idlest_group()

2019-10-23 Thread Chen, Rong A
Tested-by: kernel test robot On 10/23/2019 12:46 AM, Vincent Guittot wrote: The task, for which the scheduler looks for the idlest group of CPUs, must be discounted from all statistics in order to get a fair comparison between groups. This includes utilization, load, nr_running and idle_cpus.

[PATCH] sched/fair: fix rework of find_idlest_group()

2019-10-22 Thread Vincent Guittot
The task, for which the scheduler looks for the idlest group of CPUs, must be discounted from all statistics in order to get a fair comparison between groups. This includes utilization, load, nr_running and idle_cpus. Such unfairness can be easily highlighted with the unixbench execl 1 task. This