Hi there.
Im running Centos on a RPi3.  I came across a post about how the vidc throttles arm cpu speed to manage voltage drop and heat.
So I ran the attached script.  I have an official power supply, but still I'm getting the following output:

44.5'C  600/ 600 MHz 0000000000000000000 1.2V
  600/ 600/1185 MHz
45.1'C  600/ 600 MHz 0000000000000000000 1.2V
  600/ 600/1185 MHz

Indicating a measured 1.2v input and 600MHz.  What is curious is that none of the flag bits are set.  my boot/config.txt contains no clockspeed options.
does the CentOS distro come with its own GPU code?  The ouptut does not match what I would expect.
(I've tried replacing the PSU, with no effect)
--
Kv,
Kristján Valur Jónsson, RVX