static u64 set_pd_power_limit()

in dtpm_cpu.c [41:69]

• 21 lines of code
• 3 McCabe index (conditional complexity)

static u64 set_pd_power_limit(struct dtpm *dtpm, u64 power_limit)
{
	struct dtpm_cpu *dtpm_cpu = to_dtpm_cpu(dtpm);
	struct em_perf_domain *pd = em_cpu_get(dtpm_cpu->cpu);
	struct cpumask cpus;
	unsigned long freq;
	u64 power;
	int i, nr_cpus;

	cpumask_and(&cpus, cpu_online_mask, to_cpumask(pd->cpus));
	nr_cpus = cpumask_weight(&cpus);

	for (i = 0; i < pd->nr_perf_states; i++) {

		power = pd->table[i].power * MICROWATT_PER_MILLIWATT * nr_cpus;

		if (power > power_limit)
			break;
	}

	freq = pd->table[i - 1].frequency;

	freq_qos_update_request(&dtpm_cpu->qos_req, freq);

	power_limit = pd->table[i - 1].power *
		MICROWATT_PER_MILLIWATT * nr_cpus;

	return power_limit;
}