>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.
