void svg_pstate(int cpu, u64 start, u64 end, u64 freq)
{
double height = 0;
if (!svgfile)
return;
if (max_freq)
height = freq * 1.0 / max_freq * (SLOT_HEIGHT + SLOT_MULT);
height = 1 + cpu2y(cpu) + SLOT_MULT + SLOT_HEIGHT - height;
fprintf(svgfile, "<line x1=\"%4.8f\" x2=\"%4.8f\" y1=\"%4.1f\" y2=\"%4.1f\" class=\"pstate\"/>\n",
time2pixels(start), time2pixels(end), height, height);
fprintf(svgfile, "<text x=\"%4.8f\" y=\"%4.8f\" font-size=\"0.25pt\">%s</text>\n",
time2pixels(start), height+0.9, HzToHuman(freq));
}
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;
}
}
