函数源码

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source File:kernel\sched\cpufreq_schedutil.c Create Date:2022-07-27 10:45:43
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static int sugov_start(struct cpufreq_policy *policy)
{
    struct sugov_policy *sg_policy = policy->governor_data;
    unsigned int cpu;
 
    sg_policy->freq_update_delay_ns = sg_policy->tunables->rate_limit_us * NSEC_PER_USEC;
    sg_policy->last_freq_update_time    = 0;
    sg_policy->next_freq            = 0;
    sg_policy->work_in_progress     = false;
    sg_policy->limits_changed       = false;
    sg_policy->need_freq_update     = false;
    sg_policy->cached_raw_freq      = 0;
 
    for_each_cpu(cpu, policy->cpus) {
        struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
 
        memset(sg_cpu, 0, sizeof(*sg_cpu));
        sg_cpu->cpu         = cpu;
        sg_cpu->sg_policy       = sg_policy;
    }
 
    for_each_cpu(cpu, policy->cpus) {
        struct sugov_cpu *sg_cpu = &per_cpu(sugov_cpu, cpu);
 
        cpufreq_add_update_util_hook(cpu, &sg_cpu->update_util,
                         policy_is_shared(policy) ?
                            sugov_update_shared :
                            sugov_update_single);
    }
    return 0;
}