static void extract_cpu(pid_t pid) {
char *fname;
if (asprintf(&fname, "/proc/%d/root%s", pid, RUN_CPU_CFG) == -1)
errExit("asprintf");
struct stat s;
if (stat(fname, &s) == -1)
return;
// there is a CPU_CFG file, load it!
load_cpu(fname);
free(fname);
}
static void test_run(void)
{
int boost_time, boost_off_time, max_freq_khz;
SAFE_FILE_SCANF(cleanup, maxspeed, "%d", &max_freq_khz);
tst_resm(TINFO, "maximum speed is %d KHz", max_freq_khz);
/* Enable boost */
if (boost_value == cdrv[id].off)
SAFE_FILE_PRINTF(cleanup, cdrv[id].file, "%s", cdrv[id].on_str);
tst_resm(TINFO, "load CPU0 with boost enabled");
boost_time = load_cpu(max_freq_khz);
/* Disable boost */
SAFE_FILE_PRINTF(cleanup, cdrv[id].file, "%s", cdrv[id].off_str);
tst_resm(TINFO, "load CPU0 with boost disabled");
boost_off_time = load_cpu(max_freq_khz);
boost_off_time *= .98;
tst_resm((boost_time < boost_off_time) ? TPASS : TFAIL,
"compare time spent with and without boost (-2%%)");
}
static void extract_cpu(pid_t pid) {
char *fname;
if (asprintf(&fname, "/proc/%d/root%s/cpu", pid, MNT_DIR) == -1)
errExit("asprintf");
struct stat s;
if (stat(fname, &s) == -1)
return;
// there is a cpu file in MNT_DIR; load the information from the file
load_cpu(fname);
free(fname);
}
