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/*
* Copyright 2007, Intel Corporation
*
* This file is part of PowerTOP
*
* This program file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program in a file named COPYING; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <dirent.h>
#include "powertop.h"
struct cpufreqdata {
uint64_t frequency;
uint64_t count;
};
struct cpufreqdata freqs[16];
struct cpufreqdata oldfreqs[16];
struct cpufreqdata delta[16];
char cpufreqstrings[6][80];
int topfreq = -1;
static void zap(void)
{
memset(freqs, 0, sizeof(freqs));
}
int sort_by_count (const void *av, const void *bv)
{
const struct cpufreqdata *a = av, *b = bv;
return b->count - a->count;
}
int sort_by_freq (const void *av, const void *bv)
{
const struct cpufreqdata *a = av, *b = bv;
return b->frequency - a->frequency;
}
static unsigned long turbo_hz;
static int is_turbo(unsigned long hz)
{
if (hz == turbo_hz)
return 1;
return 0;
}
static char *HzToHuman(unsigned long hz)
{
static char buffer[1024];
memset(buffer, 0, 1024);
unsigned long long Hz;
Hz = hz;
/* default: just put the Number in */
sprintf(buffer,_("%9lli"), Hz);
if (Hz>1000)
sprintf(buffer, _("%6lli Mhz"), (Hz+500)/1000);
if (Hz>1500000)
sprintf(buffer, _("%6.2f Ghz"), (Hz+5000.0)/1000000);
if (is_turbo(hz))
sprintf(buffer, "%s", _("Turbo Mode"));
return buffer;
}
void do_cpufreq_stats(void)
{
DIR *dir;
struct dirent *dirent;
FILE *file;
char filename[PATH_MAX];
char line[1024];
int ret = 0;
int maxfreq = 0;
uint64_t total_time = 0;
memcpy(&oldfreqs, &freqs, sizeof(freqs));
memset(&cpufreqstrings, 0, sizeof(cpufreqstrings));
sprintf(cpufreqstrings[0], _("P-states (frequencies)\n"));
for (ret = 0; ret<16; ret++)
freqs[ret].count = 0;
dir = opendir("/sys/devices/system/cpu");
if (!dir)
return;
while ((dirent = readdir(dir))) {
int i;
if (dirent->d_name[0]=='.')
continue;
sprintf(filename, "/sys/devices/system/cpu/%s/cpufreq/stats/time_in_state", dirent->d_name);
file = fopen(filename, "r");
if (!file)
continue;
memset(line, 0, 1024);
i = 0;
while (!feof(file)) {
uint64_t f,count;
char *c;
if (fgets(line, 1023,file)==NULL)
break;
f = strtoull(line, &c, 10);
if (!c)
break;
count = strtoull(c, NULL, 10);
if (freqs[i].frequency && freqs[i].frequency != f) {
zap();
break;
}
freqs[i].frequency = f;
freqs[i].count += count;
if (f && maxfreq < i)
maxfreq = i;
i++;
if (i>15)
break;
}
fclose(file);
}
closedir(dir);
for (ret = 0; ret < 16; ret++) {
delta[ret].count = freqs[ret].count - oldfreqs[ret].count;
total_time += delta[ret].count;
delta[ret].frequency = freqs[ret].frequency;
if (freqs[ret].frequency != oldfreqs[ret].frequency)
return; /* duff data */
}
if (!total_time)
return;
qsort(&delta, maxfreq+1, sizeof(struct cpufreqdata), sort_by_count);
if (maxfreq>4)
maxfreq=4;
qsort(&delta, maxfreq+1, sizeof(struct cpufreqdata), sort_by_freq);
if (delta[0].frequency == delta[1].frequency + 1000)
turbo_hz = delta[0].frequency;
topfreq = -1;
for (ret = 0 ; ret<=maxfreq; ret++) {
sprintf(cpufreqstrings[ret+1], "%6s %5.1f%%\n", HzToHuman(delta[ret].frequency), delta[ret].count * 100.0 / total_time);
if (delta[ret].count > total_time/2)
topfreq = ret;
}
}
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