Release 4.9 drivers/cpufreq/cpufreq_stats.c
/*
* drivers/cpufreq/cpufreq_stats.c
*
* Copyright (C) 2003-2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>.
* (C) 2004 Zou Nan hai <nanhai.zou@intel.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/cputime.h>
static DEFINE_SPINLOCK(cpufreq_stats_lock);
struct cpufreq_stats {
unsigned int total_trans;
unsigned long long last_time;
unsigned int max_state;
unsigned int state_num;
unsigned int last_index;
u64 *time_in_state;
unsigned int *freq_table;
#ifdef CONFIG_CPU_FREQ_STAT_DETAILS
unsigned int *trans_table;
#endif
};
static int cpufreq_stats_update(struct cpufreq_stats *stats)
{
unsigned long long cur_time = get_jiffies_64();
spin_lock(&cpufreq_stats_lock);
stats->time_in_state[stats->last_index] += cur_time - stats->last_time;
stats->last_time = cur_time;
spin_unlock(&cpufreq_stats_lock);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 34 | 61.82% | 1 | 16.67% |
| venkatesh pallipadi | venkatesh pallipadi | 10 | 18.18% | 1 | 16.67% |
| viresh kumar | viresh kumar | 9 | 16.36% | 3 | 50.00% |
| martin schwidefsky | martin schwidefsky | 2 | 3.64% | 1 | 16.67% |
| Total | 55 | 100.00% | 6 | 100.00% |
static ssize_t show_total_trans(struct cpufreq_policy *policy, char *buf)
{
return sprintf(buf, "%d\n", policy->stats->total_trans);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 27 | 93.10% | 1 | 50.00% |
| viresh kumar | viresh kumar | 2 | 6.90% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
{
struct cpufreq_stats *stats = policy->stats;
ssize_t len = 0;
int i;
if (policy->fast_switch_enabled)
return 0;
cpufreq_stats_update(stats);
for (i = 0; i < stats->state_num; i++) {
len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],
(unsigned long long)
jiffies_64_to_clock_t(stats->time_in_state[i]));
}
return len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 69 | 69.70% | 1 | 16.67% |
| viresh kumar | viresh kumar | 13 | 13.13% | 2 | 33.33% |
| rafael j. wysocki | rafael j. wysocki | 9 | 9.09% | 1 | 16.67% |
| venkatesh pallipadi | venkatesh pallipadi | 7 | 7.07% | 1 | 16.67% |
| andreas schwab | andreas schwab | 1 | 1.01% | 1 | 16.67% |
| Total | 99 | 100.00% | 6 | 100.00% |
#ifdef CONFIG_CPU_FREQ_STAT_DETAILS
static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
{
struct cpufreq_stats *stats = policy->stats;
ssize_t len = 0;
int i, j;
if (policy->fast_switch_enabled)
return 0;
len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n");
len += snprintf(buf + len, PAGE_SIZE - len, " : ");
for (i = 0; i < stats->state_num; i++) {
if (len >= PAGE_SIZE)
break;
len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
stats->freq_table[i]);
}
if (len >= PAGE_SIZE)
return PAGE_SIZE;
len += snprintf(buf + len, PAGE_SIZE - len, "\n");
for (i = 0; i < stats->state_num; i++) {
if (len >= PAGE_SIZE)
break;
len += snprintf(buf + len, PAGE_SIZE - len, "%9u: ",
stats->freq_table[i]);
for (j = 0; j < stats->state_num; j++) {
if (len >= PAGE_SIZE)
break;
len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
stats->trans_table[i*stats->max_state+j]);
}
if (len >= PAGE_SIZE)
break;
len += snprintf(buf + len, PAGE_SIZE - len, "\n");
}
if (len >= PAGE_SIZE)
return PAGE_SIZE;
return len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 134 | 48.73% | 1 | 16.67% |
| venkatesh pallipadi | venkatesh pallipadi | 99 | 36.00% | 1 | 16.67% |
| cesar eduardo barros | cesar eduardo barros | 17 | 6.18% | 1 | 16.67% |
| viresh kumar | viresh kumar | 16 | 5.82% | 2 | 33.33% |
| rafael j. wysocki | rafael j. wysocki | 9 | 3.27% | 1 | 16.67% |
| Total | 275 | 100.00% | 6 | 100.00% |
cpufreq_freq_attr_ro(trans_table);
#endif
cpufreq_freq_attr_ro(total_trans);
cpufreq_freq_attr_ro(time_in_state);
static struct attribute *default_attrs[] = {
&total_trans.attr,
&time_in_state.attr,
#ifdef CONFIG_CPU_FREQ_STAT_DETAILS
&trans_table.attr,
#endif
NULL
};
static struct attribute_group stats_attr_group = {
.attrs = default_attrs,
.name = "stats"
};
static int freq_table_get_index(struct cpufreq_stats *stats, unsigned int freq)
{
int index;
for (index = 0; index < stats->max_state; index++)
if (stats->freq_table[index] == freq)
return index;
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 48 | 94.12% | 1 | 50.00% |
| viresh kumar | viresh kumar | 3 | 5.88% | 1 | 50.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
void cpufreq_stats_free_table(struct cpufreq_policy *policy)
{
struct cpufreq_stats *stats = policy->stats;
/* Already freed */
if (!stats)
return;
pr_debug("%s: Free stats table\n", __func__);
sysfs_remove_group(&policy->kobj, &stats_attr_group);
kfree(stats->time_in_state);
kfree(stats);
policy->stats = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| viresh kumar | viresh kumar | 35 | 56.45% | 4 | 57.14% |
| steven finney | steven finney | 17 | 27.42% | 1 | 14.29% |
| dave jones | dave jones | 9 | 14.52% | 1 | 14.29% |
| rafael j. wysocki | rafael j. wysocki | 1 | 1.61% | 1 | 14.29% |
| Total | 62 | 100.00% | 7 | 100.00% |
void cpufreq_stats_create_table(struct cpufreq_policy *policy)
{
unsigned int i = 0, count = 0, ret = -ENOMEM;
struct cpufreq_stats *stats;
unsigned int alloc_size;
struct cpufreq_frequency_table *pos, *table;
/* We need cpufreq table for creating stats table */
table = policy->freq_table;
if (unlikely(!table))
return;
/* stats already initialized */
if (policy->stats)
return;
stats = kzalloc(sizeof(*stats), GFP_KERNEL);
if (!stats)
return;
/* Find total allocation size */
cpufreq_for_each_valid_entry(pos, table)
count++;
alloc_size = count * sizeof(int) + count * sizeof(u64);
#ifdef CONFIG_CPU_FREQ_STAT_DETAILS
alloc_size += count * count * sizeof(int);
#endif
/* Allocate memory for time_in_state/freq_table/trans_table in one go */
stats->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
if (!stats->time_in_state)
goto free_stat;
stats->freq_table = (unsigned int *)(stats->time_in_state + count);
#ifdef CONFIG_CPU_FREQ_STAT_DETAILS
stats->trans_table = stats->freq_table + count;
#endif
stats->max_state = count;
/* Find valid-unique entries */
cpufreq_for_each_valid_entry(pos, table)
if (freq_table_get_index(stats, pos->frequency) == -1)
stats->freq_table[i++] = pos->frequency;
stats->state_num = i;
stats->last_time = get_jiffies_64();
stats->last_index = freq_table_get_index(stats, policy->cur);
policy->stats = stats;
ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
if (!ret)
return;
/* We failed, release resources */
policy->stats = NULL;
kfree(stats->time_in_state);
free_stat:
kfree(stats);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 165 | 56.51% | 3 | 18.75% |
| viresh kumar | viresh kumar | 69 | 23.63% | 7 | 43.75% |
| stratos karafotis | stratos karafotis | 24 | 8.22% | 1 | 6.25% |
| saravana kannan | saravana kannan | 23 | 7.88% | 2 | 12.50% |
| venkatesh pallipadi | venkatesh pallipadi | 5 | 1.71% | 1 | 6.25% |
| rafael j. wysocki | rafael j. wysocki | 5 | 1.71% | 1 | 6.25% |
| steven finney | steven finney | 1 | 0.34% | 1 | 6.25% |
| Total | 292 | 100.00% | 16 | 100.00% |
void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
unsigned int new_freq)
{
struct cpufreq_stats *stats = policy->stats;
int old_index, new_index;
if (!stats) {
pr_debug("%s: No stats found\n", __func__);
return;
}
old_index = stats->last_index;
new_index = freq_table_get_index(stats, new_freq);
/* We can't do stats->time_in_state[-1]= .. */
if (old_index == -1 || new_index == -1 || old_index == new_index)
return;
cpufreq_stats_update(stats);
stats->last_index = new_index;
#ifdef CONFIG_CPU_FREQ_STAT_DETAILS
stats->trans_table[old_index * stats->max_state + new_index]++;
#endif
stats->total_trans++;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 59 | 53.15% | 1 | 10.00% |
| viresh kumar | viresh kumar | 32 | 28.83% | 4 | 40.00% |
| rafael j. wysocki | rafael j. wysocki | 8 | 7.21% | 1 | 10.00% |
| konrad rzeszutek wilk | konrad rzeszutek wilk | 6 | 5.41% | 1 | 10.00% |
| venkatesh pallipadi | venkatesh pallipadi | 4 | 3.60% | 1 | 10.00% |
| li shaohua | li shaohua | 1 | 0.90% | 1 | 10.00% |
| ashok raj | ashok raj | 1 | 0.90% | 1 | 10.00% |
| Total | 111 | 100.00% | 10 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave jones | dave jones | 662 | 59.69% | 3 | 9.09% |
| viresh kumar | viresh kumar | 187 | 16.86% | 15 | 45.45% |
| venkatesh pallipadi | venkatesh pallipadi | 125 | 11.27% | 2 | 6.06% |
| rafael j. wysocki | rafael j. wysocki | 36 | 3.25% | 1 | 3.03% |
| stratos karafotis | stratos karafotis | 24 | 2.16% | 1 | 3.03% |
| saravana kannan | saravana kannan | 23 | 2.07% | 2 | 6.06% |
| steven finney | steven finney | 18 | 1.62% | 1 | 3.03% |
| cesar eduardo barros | cesar eduardo barros | 17 | 1.53% | 1 | 3.03% |
| konrad rzeszutek wilk | konrad rzeszutek wilk | 6 | 0.54% | 1 | 3.03% |
| ashok raj | ashok raj | 3 | 0.27% | 1 | 3.03% |
| paul gortmaker | paul gortmaker | 3 | 0.27% | 1 | 3.03% |
| martin schwidefsky | martin schwidefsky | 2 | 0.18% | 1 | 3.03% |
| andreas schwab | andreas schwab | 1 | 0.09% | 1 | 3.03% |
| li shaohua | li shaohua | 1 | 0.09% | 1 | 3.03% |
| frederic weisbecker | frederic weisbecker | 1 | 0.09% | 1 | 3.03% |
| Total | 1109 | 100.00% | 33 | 100.00% |