Or, cpufreq-set -f 1GHz On Thu, Sep 11, 2014 at 4:39 PM, William Hermans <[email protected]> wrote:
> Oh, and for the uninitiated . . . setting your governor to performance / > 1Ghz _all_the_time_ may not be a very good idea. For instance it has been > in the mid to upper 80's F outdoor ambient here, and I've noticed my BBB > getting pretty warm. > > On Thu, Sep 11, 2014 at 4:34 PM, William Hermans <[email protected]> > wrote: > >> From memory setting profile limits would be like this >> >> You change to a profile via >> $ sudo cpufreq-set -g <govenor_name> >> Check profile limits >> $ sudo cpufreq-info -p >> Change minimum profile range >> $ cpufreq-set -d 1000000 /*set minimum processor freq for active profile >> to 1 GHz */ >> >> I do not know if these setting persist across reboots, but I think not. >> At least it did not see that was for me. Also settings seem to be a bit >> quirky. On one of my Linux support system for instance, manually changing >> anything did not work as expected. I could change profiles, governors etc, >> but actual frequency always stayed the same. Then with BBB when you set >> minimum ondemand profile to 1Ghz, it does not take. But when changing to >> performance profile, minimum freq is 300Mhz, but when you check actual >> processor freq it is 1Ghz . . . >> >> So yeah, anyhow the program is quirky. >> >> On Thu, Sep 11, 2014 at 4:26 PM, William Hermans <[email protected]> >> wrote: >> >>> $ cpufreq-set --help. You may need to set you profile limits/ >>> performance is default 300MHz to 1Ghz just like ondemand, but for some >>> reason it is always 1GHz whenever I look. >>> >>> On Thu, Sep 11, 2014 at 3:47 PM, John Syn <[email protected]> wrote: >>> >>>> >>>> From: <[email protected]> >>>> Reply-To: "[email protected]" <[email protected]> >>>> Date: Thursday, September 11, 2014 at 3:35 PM >>>> To: "[email protected]" <[email protected]> >>>> Subject: Re: [beagleboard] Re: color ball tracking with opencv on BBB >>>> >>>> I was able to build and install the same version of openCV (2.4.9) on >>>> BBB debian as on my desktop Ubuntu by using an external USB memory stick. >>>> Now I have a problem with changing CPU frequency (as I would like to >>>> increase it from 300MHz to 1GHz) >>>> >>>> debian@beaglebone:~$ cpufreq-info >>>> cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 >>>> Report errors and bugs to [email protected], please. >>>> analyzing CPU 0: >>>> driver: generic_cpu0 >>>> CPUs which run at the same hardware frequency: 0 >>>> CPUs which need to have their frequency coordinated by software: 0 >>>> maximum transition latency: 300 us. >>>> hardware limits: 300 MHz - 1000 MHz >>>> available frequency steps: 300 MHz, 600 MHz, 800 MHz, 1000 MHz >>>> available cpufreq governors: conservative, ondemand, userspace, >>>> powersave, performance >>>> current policy: frequency should be within 300 MHz and 1000 MHz. >>>> The governor "ondemand" may decide which speed to use >>>> within this range. >>>> * current CPU frequency is 300 MHz.* >>>> cpufreq stats: 300 MHz:97.20%, 600 MHz:0.20%, 800 MHz:0.06%, 1000 >>>> MHz:2.55% (35) >>>> >>>> debian@beaglebone:~$ sudo cpufreq-set -g GOV >>>> *Error setting new values*. Common errors: >>>> - Do you have proper administration rights? (super-user?) >>>> - Is the governor you requested available and modprobed? >>>> - Trying to set an invalid policy? >>>> - Trying to set a specific frequency, but userspace governor is not >>>> available, >>>> for example because of hardware which cannot be set to a specific >>>> frequency >>>> or because the userspace governor isn't loaded? >>>> debian@beaglebone:~$ >>>> >>>> William just explained how to do this earlier today: >>>> >>>> *sudo cpufreq-set -g performance* >>>> >>>> Regards, >>>> John >>>> >>>> >>>> >>>> What am I doing wrong? >>>> >>>> Jan >>>> >>>> On Wednesday, 10 September 2014 12:52:11 UTC+10, Brandon I wrote: >>>>> >>>>> And, here are some compile flags you'll want to include/force: >>>>> http://www.eliteraspberries.com/blog/2013/09/cflags-for-numerical- >>>>> computing-on-the-beaglebone-black.html >>>>> >>>>> >>>>> On Tue, Sep 9, 2014 at 7:16 PM, Brandon I <[email protected]> wrote: >>>>> >>>>>> I'm not sure that newer open cv can be compiled on the raspberry or >>>>>> beaglebone due to the limited ram. You'll probably have to cross compile. >>>>>> >>>>>> On Tue, Sep 9, 2014 at 5:56 PM, <[email protected]> wrote: >>>>>> >>>>>>> Thanks for that link, it is very usefull. >>>>>>> In a meantime my attempt to install a newer version of opencv >>>>>>> (following the instructions from here http://robertcastle.com/2014/ >>>>>>> 02/installing-opencv-on-a-raspberry-pi/0) has failed firstly with >>>>>>> cmake-curses-gui not working (empty database?) and after that (using >>>>>>> command line cmake) the building stopped with a error message of not >>>>>>> enough >>>>>>> memory. >>>>>>> Jan >>>>>>> >>>>>>> On Tuesday, September 9, 2014 11:03:58 AM UTC+10, >>>>>>> [email protected] wrote: >>>>>>>> >>>>>>>> Hi, >>>>>>>> >>>>>>>> I need to implement tracking of color ball with opencv on BBB. >>>>>>>> I have a rev.C BBB with latest (default Debian) including opencv >>>>>>>> 2.3.1 >>>>>>>> On my desktop Ubuntu I have installed opencv 2.4.9 >>>>>>>> To check the initial performance I used the example webcam program >>>>>>>> from the book "Practical OpenCV" listing 4-4 p.34 playing >>>>>>>> the video from USB camera (Logitech C920) >>>>>>>> I need a resolution of 640x480. >>>>>>>> The problem is with a speed on BBB, having a significant delay. >>>>>>>> It's good on a desktop PC. >>>>>>>> >>>>>>>> I would like to ask for advice how to improve the performance on >>>>>>>> BBB if possible. >>>>>>>> >>>>>>>> Jan >>>>>>>> >>>>>>>> -- >>>>>>> For more options, visit http://beagleboard.org/discuss >>>>>>> --- >>>>>>> You received this message because you are subscribed to a topic in >>>>>>> the Google Groups "BeagleBoard" group. >>>>>>> To unsubscribe from this topic, visit https://groups.google.com/d/ >>>>>>> topic/beagleboard/fTan4VKv1no/unsubscribe. >>>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>>> [email protected]. >>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>> >>>>>> >>>>>> >>>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/fTan4VKv1no/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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