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#include <glib.h>
#include <stdlib.h>
#include <string.h>
#include "zenmonitor.h"
#include "sysfs.h"
#include "os.h"
#define OS_FREQ_PRINTF_FORMAT " %8.3f GHz"
static gchar **frq_files = NULL;
static guint cores;
static struct cpudev *cpu_dev_ids;
gfloat *core_freq;
gfloat *core_freq_min;
gfloat *core_freq_max;
static gdouble get_frequency(guint corei) {
gchar *data;
gdouble freq;
if (!g_file_get_contents(frq_files[corei], &data, NULL, NULL))
return 0.0;
freq = atoi(data) / 1000000.0;
g_free(data);
return freq;
}
gboolean os_init(void) {
guint i;
if (!check_zen())
return FALSE;
cores = get_core_count();
if (cores == 0)
return FALSE;
cpu_dev_ids = get_cpu_dev_ids();
frq_files = malloc(cores * sizeof (gchar*));
for (i = 0; i < cores; i++) {
frq_files[i] = g_strdup_printf(
"/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq",
cpu_dev_ids[i].cpuid);
}
core_freq = malloc(cores * sizeof (gfloat));
core_freq_min = malloc(cores * sizeof (gfloat));
core_freq_max = malloc(cores * sizeof (gfloat));
os_update();
memcpy(core_freq_min, core_freq, cores * sizeof (gfloat));
memcpy(core_freq_max, core_freq, cores * sizeof (gfloat));
return TRUE;
}
void os_update(void) {
guint i;
for (i = 0; i < cores; i++) {
core_freq[i] = get_frequency(i);
if (core_freq[i] < core_freq_min[i])
core_freq_min[i] = core_freq[i];
if (core_freq[i] > core_freq_max[i])
core_freq_max[i] = core_freq[i];
}
}
void os_clear_minmax(void) {
guint i;
for (i = 0; i < cores; i++) {
core_freq_min[i] = core_freq[i];
core_freq_max[i] = core_freq[i];
}
}
GSList* os_get_sensors(void) {
GSList *list = NULL;
SensorInit *data;
guint i;
for (i = 0; i < cores; i++) {
data = sensor_init_new();
data->label = g_strdup_printf("Core %d Frequency", display_coreid ? cpu_dev_ids[i].coreid: i);
data->hint = g_strdup_printf("Current frequency of the CPU as determined by the governor and cpufreq core.\n Source: %s", frq_files[i]);
data->value = &(core_freq[i]);
data->min = &(core_freq_min[i]);
data->max = &(core_freq_max[i]);
data->printf_format = OS_FREQ_PRINTF_FORMAT;
list = g_slist_append(list, data);
}
return list;
}
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