static noinline int tegra_cpu_speed_balance(void)
{
unsigned long highest_speed = tegra_cpu_highest_speed();
unsigned long balanced_speed = highest_speed * balance_level / 100;
unsigned long skewed_speed = balanced_speed / 2;
unsigned int nr_cpus = num_online_cpus();
unsigned int max_cpus = pm_qos_request(PM_QOS_MAX_ONLINE_CPUS) ? : 4;
unsigned int min_cpus = pm_qos_request(PM_QOS_MIN_ONLINE_CPUS);
/* balanced: freq targets for all CPUs are above 50% of highest speed
biased: freq target for at least one CPU is below 50% threshold
skewed: freq targets for at least 2 CPUs are below 25% threshold */
if (((tegra_count_slow_cpus(skewed_speed) >= 2) ||
tegra_cpu_edp_favor_down(nr_cpus, mp_overhead) ||
(highest_speed <= idle_bottom_freq) || (nr_cpus > max_cpus)) &&
(nr_cpus > min_cpus))
return TEGRA_CPU_SPEED_SKEWED;
if (((tegra_count_slow_cpus(balanced_speed) >= 1) ||
(!tegra_cpu_edp_favor_up(nr_cpus, mp_overhead)) ||
(highest_speed <= idle_bottom_freq) || (nr_cpus == max_cpus)) &&
(nr_cpus >= min_cpus))
return TEGRA_CPU_SPEED_BIASED;
return TEGRA_CPU_SPEED_BALANCED;
}
static noinline int tegra_cpu_speed_balance(void)
{
unsigned long highest_speed = tegra_cpu_highest_speed();
unsigned long balanced_speed = highest_speed * balance_level / 100;
unsigned long skewed_speed = balanced_speed / 2;
unsigned int nr_cpus = num_online_cpus();
unsigned int max_cpus = pm_qos_request(PM_QOS_MAX_ONLINE_CPUS) ? : 4;
unsigned int min_cpus = pm_qos_request(PM_QOS_MIN_ONLINE_CPUS);
unsigned int avg_nr_run = avg_nr_running();
unsigned int nr_run;
/* Evaluate:
* - distribution of freq targets for already on-lined CPUs
* - average number of runnable threads
* - effective MIPS available within EDP frequency limits,
* and return:
* TEGRA_CPU_SPEED_BALANCED to bring one more CPU core on-line
* TEGRA_CPU_SPEED_BIASED to keep CPU core composition unchanged
* TEGRA_CPU_SPEED_SKEWED to remove CPU core off-line
*/
unsigned int *current_profile = rt_profiles[rt_profile_sel];
for (nr_run = 1; nr_run < ARRAY_SIZE(rt_profile_default); nr_run++) {
unsigned int nr_threshold = current_profile[nr_run - 1];
if (nr_run_last <= nr_run)
nr_threshold += nr_run_hysteresis;
if (avg_nr_run <= (nr_threshold << (FSHIFT - NR_FSHIFT)))
break;
}
nr_run_last = nr_run;
//
#ifdef CONFIG_MACH_X3
if(threads_count_hotplug_control_enable == 0 && highest_speed >= 640000 )
nr_run++;
#endif
if (((tegra_count_slow_cpus(skewed_speed) >= 2) ||
(nr_run < nr_cpus) ||
tegra_cpu_edp_favor_down(nr_cpus, mp_overhead) ||
(highest_speed <= idle_bottom_freq) || (nr_cpus > max_cpus)) &&
(nr_cpus > min_cpus))
return TEGRA_CPU_SPEED_SKEWED;
if (((tegra_count_slow_cpus(balanced_speed) >= 1) ||
(nr_run <= nr_cpus) ||
(!tegra_cpu_edp_favor_up(nr_cpus, mp_overhead)) ||
(highest_speed <= idle_bottom_freq) || (nr_cpus == max_cpus)) &&
(nr_cpus >= min_cpus))
return TEGRA_CPU_SPEED_BIASED;
return TEGRA_CPU_SPEED_BALANCED;
}
