On 06/18/2013 05:44 PM, Alex Shi wrote:
>
>>
>> Paul, could I summary your point here:
>> keep current weighted_cpu_load, but add blocked load avg in
>> get_rq_runnable_load?
>>
>> I will test this change.
>
> Current testing(kbuild, oltp, aim7) don't show clear different on my NHM EP
> box
> between the following and the origin patch,
> the only different is get_rq_runnable_load added blocked_load_avg. in SMP
> will test more cases and more box.
I tested the tip/sched/core, tip/sched/core with old patchset and
tip/schec/core with the blocked_load_avg on Core2 2S, NHM EP, IVB EP,
SNB EP 2S and SNB EP 4S box, with benchmark kbuild, sysbench oltp,
hackbench, tbench, dbench.
blocked_load_avg VS origin patchset, oltp has suspicious 5% and
hackbench has 3% drop on NHM EX; dbench has suspicious 6% drop on NHM
EP. other benchmarks has no clear change on all other machines.
origin patchset VS sched/core, hackbench rise 20% on NHM EX, 60% on SNB
EP 4S, and 30% on IVB EP. others no clear changes.
>
> ---
> kernel/sched/fair.c | 5 +++--
> kernel/sched/proc.c | 17 +++++++++++++++--
> 2 files changed, 18 insertions(+), 4 deletions(-)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 1e5a5e6..7d5c477 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -2968,7 +2968,7 @@ 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 cpu_rq(cpu)->cfs.runnable_load_avg;
> }
>
> /*
> @@ -3013,9 +3013,10 @@ static unsigned long cpu_avg_load_per_task(int cpu)
> {
> struct rq *rq = cpu_rq(cpu);
> unsigned long nr_running = ACCESS_ONCE(rq->nr_running);
> + unsigned long load_avg = rq->cfs.runnable_load_avg;
>
> if (nr_running)
> - return rq->load.weight / nr_running;
> + return load_avg / nr_running;
>
> return 0;
> }
> diff --git a/kernel/sched/proc.c b/kernel/sched/proc.c
> index bb3a6a0..36d7db6 100644
> --- a/kernel/sched/proc.c
> +++ b/kernel/sched/proc.c
> @@ -501,6 +501,18 @@ static void __update_cpu_load(struct rq *this_rq,
> unsigned long this_load,
> sched_avg_update(this_rq);
> }
>
> +#ifdef CONFIG_SMP
> +unsigned long get_rq_runnable_load(struct rq *rq)
> +{
> + return rq->cfs.runnable_load_avg + rq->cfs.blocked_load_avg;
> +}
> +#else
> +unsigned long get_rq_runnable_load(struct rq *rq)
> +{
> + return rq->load.weight;
> +}
> +#endif
> +
> #ifdef CONFIG_NO_HZ_COMMON
> /*
> * There is no sane way to deal with nohz on smp when using jiffies because
> the
> @@ -522,7 +534,7 @@ 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 = get_rq_runnable_load(this_rq);
> unsigned long pending_updates;
>
> /*
> @@ -568,11 +580,12 @@ void update_cpu_load_nohz(void)
> */
> void update_cpu_load_active(struct rq *this_rq)
> {
> + unsigned long load = get_rq_runnable_load(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, load, 1);
>
> calc_load_account_active(this_rq);
> }
>
--
Thanks
Alex
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
