On 10/25/2018 9:48 AM, Valentin Schneider wrote:
> Hi Steve,
>
> On 22/10/2018 15:59, Steve Sistare wrote:
> [...]
>> +/*
>> + * Try to steal a runnable CFS task from a CPU in the same LLC as @dst_rq,
>> + * and migrate it to @dst_rq. rq_lock is held on entry and return, but
>> + * may be dropped
Hi Steve,
On 22/10/2018 15:59, Steve Sistare wrote:
[...]
> @@ -9683,6 +9698,141 @@ void trigger_load_balance(struct rq *rq)
> nohz_balancer_kick(rq);
> }
>
> +/*
> + * Search the runnable tasks in @cfs_rq in order of next to run, and find
> + * the first one that can be migrated to @dst_
When a CPU has no more CFS tasks to run, and idle_balance() fails to find a
task, then attempt to steal a task from an overloaded CPU in the same LLC,
using the cfs_overload_cpus bitmap to efficiently identify candidates. To
minimize search time, steal the first migratable task that is found when
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