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 <yyrk...@gmail.com> 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 <yyrk...@gmail.com> > 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 <john3...@gmail.com> wrote: >> >>> >>> From: <janszymanski12...@gmail.com> >>> Reply-To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> >>> Date: Thursday, September 11, 2014 at 3:35 PM >>> To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> >>> 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 cpuf...@vger.kernel.org, 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 <brando...@gmail.com> 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, <janszyma...@gmail.com> 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, >>>>>> janszyma...@gmail.com 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 >>>>>> beagleboard...@googlegroups.com. >>>>>> 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 beagleboard+unsubscr...@googlegroups.com. >>> 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 beagleboard+unsubscr...@googlegroups.com. >>> 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
