Re: [Patch] Idle balancer: cache align nohz structure to improve idle load balancing scalability

[Andi Kleen]

Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx> writes:
>   */
>  static struct {
> -	atomic_t load_balancer;
> -	atomic_t first_pick_cpu;
> -	atomic_t second_pick_cpu;
> -	cpumask_var_t idle_cpus_mask;
> +	atomic_t load_balancer ____cacheline_aligned;
> +	atomic_t first_pick_cpu ____cacheline_aligned;
> +	atomic_t second_pick_cpu ____cacheline_aligned;
> +	cpumask_var_t idle_cpus_mask ____cacheline_aligned;

On large configs idle_cpu_masks may be allocated.  May need
more changes to tell the allocator to cache align/pad too?

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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