cpufreq

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


int read_command(char command[]) {
    int current_data = 0;
    FILE *fp;
    fp = popen(command, "r");
    if (fp == NULL) {
        printf("Comando não executado\n");
        exit(1);
    } else {
        fscanf(fp, "%d", &current_data);
    }
    fclose(fp);
    return current_data;
}

short int cpu_cores () {
    short int cores = 0;
    cores = read_command("nproc");
    return cores;
}

int check_max_freq () {
    return read_command("cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq")/1000;
}

int set_performance (int freq, short int cores) {
    char command[50];
    for (short int i=0; i<cores; i++) {
        sprintf(command, "cpufreq-set -d %d -c %d -g performance", freq, i);
        system(command);
    }
}

int main (void) {
    int maxFrequency = 0;
    short int cpuCores = 0;
    cpuCores = cpu_cores();
    maxFrequency = check_max_freq(cpuCores);
    set_performance(maxFrequency, cpuCores);
    return 0;
}