mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-07 08:48:05 -04:00
98 lines
2.2 KiB
C
Executable file
98 lines
2.2 KiB
C
Executable file
/*
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* ARM Intelligent Power Allocation
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*
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* Copyright (C) 2013 ARM Limited.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/cpufreq.h>
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#include <linux/cpumask.h>
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#include <linux/kernel.h>
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#include <linux/percpu.h>
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#include <linux/types.h>
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#include <trace/events/power.h>
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#include "cpu_load_metric.h"
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struct cpu_load
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{
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unsigned int frequency;
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unsigned int load;
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u64 last_update;
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};
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static DEFINE_PER_CPU(struct cpu_load, cpuload);
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void update_cpu_metric(int cpu, u64 now, u64 delta_idle, u64 delta_time,
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struct cpufreq_policy *policy)
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{
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struct cpu_load *pcpuload = &per_cpu(cpuload, cpu);
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unsigned int load;
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/*
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* Calculate the active time in the previous time window
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*
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* load = active time / total_time * 100
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*/
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if (delta_time <= delta_idle)
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load = 0;
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else
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load = div64_u64((100 * (delta_time - delta_idle)), delta_time);
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pcpuload->load = load;
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pcpuload->frequency = policy->cur;
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pcpuload->last_update = now;
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#ifdef CONFIG_CPU_THERMAL_IPA_DEBUG
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trace_printk("cpu_load: cpu: %d freq: %u load: %u\n", cpu, policy->cur, load);
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#endif
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}
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void cpu_load_metric_get(int *load, int *freq)
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{
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int _load = 0, _freq = 0;
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int cpu;
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for_each_online_cpu(cpu) {
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struct cpu_load *pcpuload = &per_cpu(cpuload, cpu);
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_load += pcpuload->load;
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_freq = pcpuload->frequency;
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}
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*load = _load;
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*freq = _freq;
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}
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static void get_cluster_stat(struct cluster_stats *cl)
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{
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int util = 0, freq = 0;
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int cpu, i = 0;
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for_each_cpu(cpu, cl->mask) {
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struct cpu_load *pcpuload = &per_cpu(cpuload, cpu);
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int load = (cpu_online(cpu)) ? pcpuload->load : 0;
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util += load;
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cl->utils[i++] = load;
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freq = pcpuload->frequency;
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}
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cl->util = util;
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cl->freq = freq;
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}
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void get_cluster_stats(struct cluster_stats *clstats)
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{
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get_cluster_stat(&clstats[0]);
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get_cluster_stat(&clstats[1]);
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}
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