raspberry pi - How Raspbian can control temperature by setup temp_limit in config.txt -


just got new rpi gen #3, has default /boot/config.txt has 

temp_limit=85

i turn down 

temp_limit=70

after reboot, works. if don't know how stress pi processor, , how read temperature of that, feel free clone simple github code (shell script) , run that. 

 https://github.com/fisherworks/raspberry_pi_stress

i thought it's dynamic lowering frequency can limit temperature of rpi - using following command, shows frequency still 1200000, means it's running on full power.

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

now question - how raspbian control temperature of bcm processor without reducing freq?

try instead.

vcgencmd measure_clock arm

and can check if being(has been), throttled, capped, or in under-voltage this.

vcgencmd get_throttled

https://retropie.org.uk/forum/topic/2295/runcommand-warning-if-voltage-temperature-throttling

return code 0x50005.

bit pattern:

  • 0: under-voltage
  • 1: arm frequency capped
  • 2: throttled
  • 16: under-voltage has occurred
  • 17: arm frequency capped has occurred
  • 18: throttling has occurred

update: know command used;

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

but seems not used anymore , found new 1 being used;

sudo cat /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_cur_freq

you can use or vcgencmd.


-

Comments

Post a Comment

Popular posts from this blog

PySide and Qt Properties: Connecting signals from Python to QML -

i trying run simple pyside appliccation design made in qml. call function in qml python in separated thread. i have following qml view: import qt 4.7 rectangle { visible: true width: 100; height: 100 color: "lightgrey" text { id: datestr objectname: "datestr" x: 10 y: 10 text: "init text" font.pixelsize: 12 function updatedata(text) { datestr.text = qstr(text) console.log("you said: " + text) } } } here application: some imports.... #!/usr/bin/python import sys import time pyside import qtdeclarative, qtcore pyside.qtgui import qapplication pyside.qtdeclarative import qdeclarativeview the qthread worker.... #worker thread class worker(qtcore.qthread): updateprogress = qtcore.signal(int) def __init__(self, child): qtcore.qthread.__init__(self) self.child = child def run(self):
Read more

c# - DevExpress.Wpf.Grid.InfiniteGridSizeException was unhandled -

Image
when using devexpress, see error: devexpress.wpf.grid.infinitegridsizeexception unhandled message="by default, infinite grid height not allowed since grid rows rendered , hence grid work slowly. fix issue, should place grid container give finite height grid, or should manually specify grid's height or maxheight. note can avoid exception setting gridcontrol.allowinfinitegridsize static property true, in case grid run slowly." the problem dxgrid has infinite height. to fix, set height non-infinite. snoop absolutely invaluable this: if "height" xaml element infinite (i.e. 0 or nan ), can set using one of following: option 1: height="{binding path=actualheight, relativesource={relativesource mode=findancestor, ancestortype=uielement}}" option 2: verticalalignment="stretch" option 3: height="auto" hint: use verticalalignment="stretch" if child of grid <rowdefinition height=
Read more

scala - 'wrong top statement declaration' when using slick in IntelliJ -

Image
i'm porting project scala 2.9 2.10, therefore have use slick instead of scalaquery. i'm using slick 2.1.0 since supports ms access. according this tutorial , upgrade guide changed robs object class , added val robs : why error message wrong top statement declaration , how rid of it? edit: i'm new scala... according this question seems can't put val outside of methods or classes, right? code above directly in packge. right approach slick then? should move code in class or trait? according this changed val robs = tablequery[robs] to object robs extends tablequery(new robs(_)) {} . no warnings or errors anymore. :)
Read more