Messages in this thread Patch in this message | | | From | Morten Rasmussen <> | Subject | [PATCH v2 06/13] sched: Store maximum per-cpu capacity in root domain | Date | Wed, 22 Jun 2016 18:03:17 +0100 |
| |
From: Dietmar Eggemann <dietmar.eggemann@arm.com>
To be able to compare the capacity of the target cpu with the highest available cpu capacity, store the maximum per-cpu capacity in the root domain.
cc: Ingo Molnar <mingo@redhat.com> cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> --- kernel/sched/core.c | 9 +++++++++ kernel/sched/sched.h | 2 ++ 2 files changed, 11 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index fe39118ffdfb..5093765e9930 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6855,6 +6855,7 @@ static int build_sched_domains(const struct cpumask *cpu_map, enum s_alloc alloc_state; struct sched_domain *sd; struct s_data d; + struct rq *rq = NULL; int i, ret = -ENOMEM; alloc_state = __visit_domain_allocation_hell(&d, cpu_map); @@ -6905,11 +6906,19 @@ static int build_sched_domains(const struct cpumask *cpu_map, /* Attach the domains */ rcu_read_lock(); for_each_cpu(i, cpu_map) { + rq = cpu_rq(i); sd = *per_cpu_ptr(d.sd, i); cpu_attach_domain(sd, d.rd, i); + + if (rq->cpu_capacity_orig > rq->rd->max_cpu_capacity) + rq->rd->max_cpu_capacity = rq->cpu_capacity_orig; } rcu_read_unlock(); + if (rq) + pr_info("span: %*pbl (max cpu_capacity = %lu)\n", + cpumask_pr_args(cpu_map), rq->rd->max_cpu_capacity); + ret = 0; error: __free_domain_allocs(&d, alloc_state, cpu_map); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 72f1f3087b04..3e9904ef224f 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -564,6 +564,8 @@ struct root_domain { */ cpumask_var_t rto_mask; struct cpupri cpupri; + + unsigned long max_cpu_capacity; }; extern struct root_domain def_root_domain; -- 1.9.1
| |