Hi Alex,
On 12/10/2012 01:52 PM, Alex Shi wrote:
> They are the base values in load balance, update them with rq runnable
> load average, then the load balance will consider runnable load avg
> naturally.
>
> Signed-off-by: Alex Shi <alex....@intel.com>
> ---
> kernel/sched/core.c | 4 ++--
> kernel/sched/fair.c | 4 ++--
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 96fa5f1..0ecb907 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -2487,7 +2487,7 @@ static void __update_cpu_load(struct rq *this_rq,
> unsigned long this_load,
> void update_idle_cpu_load(struct rq *this_rq)
> {
> unsigned long curr_jiffies = ACCESS_ONCE(jiffies);
> - unsigned long load = this_rq->load.weight;
> + unsigned long load = (unsigned long)this_rq->cfs.runnable_load_avg;
> unsigned long pending_updates;
>
> /*
> @@ -2537,7 +2537,7 @@ static void update_cpu_load_active(struct rq *this_rq)
> * See the mess around update_idle_cpu_load() / update_cpu_load_nohz().
> */
> this_rq->last_load_update_tick = jiffies;
> - __update_cpu_load(this_rq, this_rq->load.weight, 1);
> + __update_cpu_load(this_rq, this_rq->cfs.runnable_load_avg, 1);
>
> calc_load_account_active(this_rq);
> }
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 61c8d24..6d893a6 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -2680,7 +2680,7 @@ static void dequeue_task_fair(struct rq *rq, struct
> task_struct *p, int flags)
> /* Used instead of source_load when we know the type == 0 */
> static unsigned long weighted_cpuload(const int cpu)
> {
> - return cpu_rq(cpu)->load.weight;
> + return (unsigned long)cpu_rq(cpu)->cfs.runnable_load_avg;
I was wondering why you have typecasted the cfs.runnable_load_avg to
unsigned long.Have you looked into why it was declared as u64 in the
first place?
> }
>
> /*
> @@ -2727,7 +2727,7 @@ static unsigned long cpu_avg_load_per_task(int cpu)
> unsigned long nr_running = ACCESS_ONCE(rq->nr_running);
>
> if (nr_running)
> - return rq->load.weight / nr_running;
> + return rq->cfs.runnable_load_avg / nr_running;
rq->cfs.runnable_load_avg is u64 type.you will need to typecast it here
also right? how does this division work? because the return type is
unsigned long.
>
> return 0;
> }
>
Regards
Preeti U Murthy
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