diff -up powertop-2.3/src/tuning/cpufreq.cpp.orig powertop-2.3/src/tuning/cpufreq.cpp
--- powertop-2.3/src/tuning/cpufreq.cpp.orig 2013-01-31 22:39:27.000000000 +0100
+++ powertop-2.3/src/tuning/cpufreq.cpp 2013-06-28 14:05:04.254925669 +0200
@@ -63,6 +63,7 @@ int cpufreq_tunable::good_bad(void)
char gov[1024];
int ret = TUNE_GOOD;
+ unsigned long int ld;
gov[0] = 0;
@@ -91,6 +92,30 @@ int cpufreq_tunable::good_bad(void)
if (strcmp(gov, line))
ret = TUNE_BAD;
fclose(file);
+
+ /* check if ondemand governor is available */
+ sprintf(filename, "/sys/devices/system/cpu/%s/cpufreq/scaling_available_governors", dirent->d_name);
+ file = fopen(filename, "r");
+ if (!file)
+ continue;
+ memset(line, 0, 1024);
+ if (fgets(line, 1023,file)==NULL || strstr(line, "ondemand")==NULL) {
+ fclose(file);
+ continue;
+ }
+ fclose(file);
+
+ /* check if cpu transition latency is not higher than ondemand governor max_transition_latency */
+ sprintf(filename, "/sys/devices/system/cpu/%s/cpufreq/cpuinfo_transition_latency", dirent->d_name);
+ file = fopen(filename, "r");
+ if (!file)
+ continue;
+ if (fscanf(file, "%lu", &ld) != 1 || ld > 10000000)
+ {
+ fclose(file);
+ continue;
+ }
+ fclose(file);
}
closedir(dir);