Updating to the 2012-09-18-wheezy-raspbian image

[mechilless]

i got this error when i set turbo. and even with a load on it is seems to stay at 700MHz


update-rc.d: using dependency based boot sequencing
update-rc.d: warning: default start runlevel arguments (2 3 4 5) do not match switch_cpu_governor Default-Start values (S)
update-rc.d: warning: default stop runlevel arguments (0 1 6) do not match switch_cpu_governor Default-Stop values (none)

[spectrepaul]

Fantastic, easy to upgrade and set up the turbo mode, just checked it with: cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

Changes from 700 to 1g when needed!

Absolutely great guys

[asb]

i got this error when i set turbo. and even with a load on it is seems to stay at 700MHz


update-rc.d: using dependency based boot sequencing
update-rc.d: warning: default start runlevel arguments (2 3 4 5) do not match switch_cpu_governor Default-Start values (S)
update-rc.d: warning: default stop runlevel arguments (0 1 6) do not match switch_cpu_governor Default-Stop values (none)

It's a harmless warning.

[mechilless]

Roger That ... thanks
Mitchell

i got this error when i set turbo. and even with a load on it is seems to stay at 700MHz


update-rc.d: using dependency based boot sequencing
update-rc.d: warning: default start runlevel arguments (2 3 4 5) do not match switch_cpu_governor Default-Start values (S)
update-rc.d: warning: default stop runlevel arguments (0 1 6) do not match switch_cpu_governor Default-Stop values (none)

It's a harmless warning.

[diplopi]

Hi,

did I miss something? When trying

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

I get a "No such file or directory" error.

Can you help me with that?

Thanks in advance. Regards, rob

[mister_wavey]

try

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

again. if it doesn't work, your kernel probably isn't in cpufreq mode properly. run the raspi-config again and select the overclock settings again.

[JulienV]

I found a package for those who want to check the increase in frequency when cpu is under stress.

Installation :

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sudo apt-get install stress

Then you can do something like that (on a single command line) :

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stress -c 1 & sleep 3 ; echo "CPU freq :" ; cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq ; killall stress

[scorp]

I had previous(I think 07.08.2012) Raspbian but on usb hdd. Unfortunately update mentioned in the first post finished with error Sub-process /usr/bin/dpkg returned an error code (1). I don't have more details, just decided to install fresh image

[Zxa]

For anyone else running a PHP web server on their Pi, here's a simple snippet to show the core temp and freq on a web page (with comments for anyone newish to PHP):

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Current core temperature: <?php
$temp = intval(file_get_contents("/sys/class/thermal/thermal_zone0/temp")); // read the file as a string[file_get_contents()], and convert to an int [intval()]so we can do math functions with it
$color = "#060"; // default colour
if($temp >= 60000) { $color = "#F00"; } //set to red if over 60 degrees (is in milliDegrees)
elseif($temp >= 50000) { $color = "#FC0"; } // set to yellow if over 50 degrees
echo "<span style=\"color:".$color.";\">".($temp/1000)."&deg;C / ".(($temp/1000)+271.15)."K</span>";
?><br />// display in correct colour and convert to degrees. Also in Kelvin because why not?! :)
Current core frequency: <?php
$freq = intval(file_get_contents("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq"));
echo ($freq/1000)."MHz"; // covert to MHz from kHz
?><br />

The temperature colours I chose arbitrariy, and may make no sense regarding the actual temperature scale the Pi is designed to run at (I notice the foundation are happy up to about 85 degrees.) It's not the prettiest display, but I was just curious to see if you could read this info from a script. It also means I can easily check on my Pi's temp without SSHing in, as I run it headless.

[simplesi]

Ok - very nice - but .....

Very grateful for the new release but I'm just wondering if there is something missing in the way the new sanctioned overclocking turbo mode is configured (or maybe I'm just missing a simple setting somewhere)

We would all (unless trying to do some low power thingy) want our RPis to run as fast as reasonably possible for as much of the time as possible.

I'm looking at Scratch (which suffers from the basic low CPU power of the RPi) and any speed boost is welcome.

I've set my RPi to turbo mode and when Scratch loads - it uses a lot of CPU so turbo kicks in and boosts to 1GHz so Scratch ends up loading faster (approx 40% quicker) - great

Run a complicated game and it runs at 1GHz most of time - great - excellent boost

But....
if CPU load not high in a less demanding game - speed drops back to 700Mhz and no visible boost in performance
The shift from 1Ghz to 700Mhz is enough to cause a quite noticeable stutter (most noticeable when drawing a new sprite) or when a game crosses over the turbo CPU threshold and suddenly speeds up or slows down.

I'm thinking that we need a minimum overclock setting so that it doesn't go back down to 700Mhz so that we can all feel the benefit for longer

regards

Simon

[nummy]

how do we do the nbench?

I downloaded nbench 2.2.3 from http://www.tux.org/~mayer/linux/bmark.html
do I just do "make" in the directory?

what about all these other compiler options I see posted in other threads?

[Yggdrasil]

Thanks for this great update!

[williamhbell]

Hi,

During the update, the Pi was turned off so that the update many not have completed correctly. How can the update be re-run? Is it enough to force the script in the deb file to re-run?

On the second Pi the update script is still running after 2hrs.

Thanks and best regards,

Will

After 6hrs the apt-get upgrade is still running. This is nothing fancy, just the default configuration with X running.

Regards, Will

[tytoons]

/opt/vc/bin/vcgencmd measure_temp
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

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cat /sys/class/thermal/thermal_zone0/temp
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

is a better way. Temperature is in milli-degrees C. Freq in kHz.

I ran sudo apt-get update && sudo apt-get install raspberrypi* raspi-config

Then I try cat /sys/class/thermal/thermal_zone0/temp it can't find it. Am I missing something?

*EDIT* - I rebooted it again and now it works!

[Sander]

how do we do the nbench?

I downloaded nbench 2.2.3 from http://www.tux.org/~mayer/linux/bmark.html
do I just do "make" in the directory?

Yes, here's how:

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cd
wget  http://www.tux.org/~mayer/linux/nbench-byte-2.2.3.tar.gz
tar xvzf nbench-byte-2.2.3.tar.gz 
cd nbench-byte-2.2.3/
make
./nbench 

FWIW: I was not yet able to reach higher performance

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TEST                : Iterations/sec.  : Old Index   : New Index
                    :                  : Pentium 90* : AMD K6/233*
--------------------:------------------:-------------:------------
NUMERIC SORT        :           216.6  :       5.55  :       1.82
STRING SORT         :          30.711  :      13.72  :       2.12

To be continued

[asb]

tytoons: did you reboot?

[sghazagh]

/opt/vc/bin/vcgencmd measure_temp
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

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cat /sys/class/thermal/thermal_zone0/temp
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

is a better way. Temperature is in milli-degrees C. Freq in kHz.

I cannot run this two command!
It says, " No such file or directory"

[dom]

FWIW: I was not yet able to reach higher performance

I built mine on linux PC with this toolchain:
https://github.com/raspberrypi/tools/tr ... f-raspbian

You can get the binary here:
https://dl.dropbox.com/u/3669512/temp/nbench_linaro
You need NNET.DAT and COM.DAT in the same directory (they are in nbench-byte-2.2.3.tar.gz)

[dom]

I cannot run this two command!
It says, " No such file or directory"

It suggests you haven't done one of: updating, enabling overclock or rebooting.

[tytoons]

tytoons: did you reboot?

Nope totally forgot!

Thank you, works now!

[diplopi]

When trying to active overclocking, I get this:

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update-rc.d: using dependency based boot sequencing
update-rc.d: warning: default start runlevel arguments (2 3 4 5) do not match switch_cpu_governor Default-Start values (S)
update-rc.d: warning: default stop runlevel arguments (0 1 6) do not match switch_cpu_governor Default-Stop values (none)
insserv: warning: script 'K01mountdisk' missing LSB tags and overrides
insserv: warning: script 'mountdisk' missing LSB tags and overrides

[asb]

diplopi: just warnings, it's fine. Be aware you want to reboot after enabling overclock (raspi-config suggests you do this upon exit).

[diplopi]

Hi asb,

I did reboot and it still says: No such file or directory

I did upgrade and update. Set overclock, reboot and still "No such file or directory".

:/

Regards, Robert

[pygmy_giant]

How do you enable overclock - I just updated and rebooted - should I do something else to feel the benefits of turbo mode?

[r0nnie]

How do you enable overclock - I just updated and rebooted - should I do something else to feel the benefits of turbo mode?

in terminal type - sudo raspi-config
then select overclock then reboot