I've a Ubuntu 16.04 running on my physical machine. Am trying to set all the cpu scaling governor to "performance".
Installed package versions are:
# dpkg -l | grep cpufreq
ii cpufrequtils 008-1 amd64 utilities to deal with the cpufreq Linux kernel feature
ii libcpufreq0 008-1 amd64 shared library to deal with the cpufreq Linux kernel feature
when I try the following command,
# cpufreq-set -r -g performance
Segmentation fault
And strace the above command shows
open("/sys/devices/system/cpu/cpu0/cpufreq/related_cpus", O_RDONLY) = -1 ENOENT (No such file or directory)
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0} ---
+++ killed by SIGSEGV +++
Segmentation fault
I can't see these locations ( /sys/devices/system/cpu/cpu*/cpufreq ). Don't know what is missing.
cpufreq-info says "no or unknown cpufreq driver" why? what driver is missing?
# cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to [email protected], please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 2:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 3:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 4:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.