diff options
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 9bc717ef81f5..b904a023be95 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5773,15 +5773,18 @@ energy_diff(struct energy_env *eenv) * being client/server, worker/dispatcher, interrupt source or whatever is * irrelevant, spread criteria is apparent partner count exceeds socket size. */ -static int wake_wide(struct task_struct *p) +static int wake_wide(struct task_struct *p, int sibling_count_hint) { unsigned int master = current->wakee_flips; unsigned int slave = p->wakee_flips; - int factor = this_cpu_read(sd_llc_size); + int llc_size = this_cpu_read(sd_llc_size); + + if (sibling_count_hint >= llc_size) + return 1; if (master < slave) swap(master, slave); - if (slave < factor || master < slave * factor) + if (slave < llc_size || master < slave * llc_size) return 0; return 1; } @@ -6754,7 +6757,8 @@ unlock: * preempt must be disabled. */ static int -select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_flags) +select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_flags, + int sibling_count_hint) { struct sched_domain *tmp, *affine_sd = NULL, *sd = NULL; int cpu = smp_processor_id(); @@ -6762,9 +6766,12 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f int want_affine = 0; int sync = wake_flags & WF_SYNC; - if (sd_flag & SD_BALANCE_WAKE) - want_affine = !wake_wide(p) && !wake_cap(p, cpu, prev_cpu) - && cpumask_test_cpu(cpu, tsk_cpus_allowed(p)); + if (sd_flag & SD_BALANCE_WAKE) { + record_wakee(p); + want_affine = !wake_wide(p, sibling_count_hint) && + !wake_cap(p, cpu, prev_cpu) && + cpumask_test_cpu(cpu, &p->cpus_allowed); + } if (energy_aware() && !(cpu_rq(prev_cpu)->rd->overutilized)) return select_energy_cpu_brute(p, prev_cpu, sync); |