Messages in this thread | | | Date | Fri, 27 Mar 2015 10:12:01 +0800 | From | Wanpeng Li <> | Subject | Re: [PATCH V2] sched: Improve load balancing in the presence of idle CPUs |
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Hi Preeti, On Thu, Mar 26, 2015 at 06:32:44PM +0530, Preeti U Murthy wrote: > >1. An ILB CPU was chosen from the first numa domain to trigger nohz idle >load balancing [Given the experiment, upto 6 CPUs per core could be >potentially idle in this domain.] > >2. However the ILB CPU would call load_balance() on itself before >initiating nohz idle load balancing. > >3. Given cores are SMT8, the ILB CPU had enough opportunities to pull >tasks from its sibling cores to even out load. > >4. Now that the ILB CPU was no longer idle, it would abort nohz idle >load balancing
I don't see abort nohz idle load balancing when ILB CPU was no longer idle in nohz_idle_balance(), could you explain more in details?
Regards, Wanpeng Li
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