Created attachment 229121 [details]
cpupower-frequency-set patch

cpupower frequency-set -g performance

has no effect.
I think this is due to a bug introduced by ac5a181d065d74fb:

@@ -298,3 +298,3 @@ int cmd_freq_set(int argc, char **argv)
                        if (!bitmask_isbitset(cpus_chosen, cpu) ||
-                           cpufreq_cpu_exists(cpu))
+                           cpupower_is_cpu_online(cpu))
                                continue;
@@ -318,6 +318,6 @@ int cmd_freq_set(int argc, char **argv)
                if (!bitmask_isbitset(cpus_chosen, cpu) ||
-                   cpufreq_cpu_exists(cpu))
+                   cpupower_is_cpu_online(cpu))
                        continue;
 
-               if (sysfs_is_cpu_online(cpu) != 1)
+               if (cpupower_is_cpu_online(cpu) != 1)
                        continue;

The two functions cpufreq_cpu_exists() and sysfs_is_cpu_online() were replaced by cpupower_is_cpu_online(), which is misused in the first test.

I'm proposing a patch in attachment.