CPU frequency

Thomas

Hi

I'm trying to use the Up-board with Ubuntu 14.04.5 Server (64-bit) and the up-board kernel installed (as described on https://up-community.org/wiki/Ubuntu):

# uname -r
4.4.0-1-upboard
# lsb_release -a
Distributor ID:	Ubuntu
Description:	Ubuntu 14.04.5 LTS
Release:	14.04
Codename:	trusty

Neither using the cpu governor powersave nor the governor performance , the cpu actually scales the frequency up (according to the tool cpupower):

[ul]
[li]Using (as root) cpupower frequency-set -g performance I switch the governor to performance[/li]
[li]Neither when I'm compiling software nor running some cpu intensive software, the frequency shown with cpupower monitor or cpufreq-info or any other tool I could find shows an increased cpu freq.[/li]
[/ul]

I also checked the cpu temperature, which seems to be ok at around 45°C.


Any ideas, why the CPU freq is not scaled up?

Output of cpupower frequency-info: (the same for CPU 0 -3)

# cpupower frequency-info
analyzing CPU 0:
  driver: intel_pstate
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 0.97 ms.
  hardware limits: 480 MHz - 1.92 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 480 MHz and 1.92 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 480 MHz (asserted by call to hardware).
  boost state support:
    Supported: yes
    Active: yes

Thomas

Oh... looks like a bios update as described on https://up-community.org/wiki/Firmware does the charm.

CPU seems to be scaling up and down now.

Marcello

thomasm wrote:

Oh... looks like a bios update as described on https://up-community.org/wiki/Firmware does the charm.

CPU seems to be scaling up and down now.

Have you ever seen more than 1.6ghz?

Thomas

Actually no, not so far... I was already really happy about the performance when compiling and running cpu intensive software ;-)

But of course, it would be nice if turboboost (or however Intel calls this nowadays..) would be used as long as cpu temp is in a reasonable range.

Marcello

I am also generally happy but clearly the cpu is not going past 1.6ghz, not even in single threaded benchmarks.