Re: [beagleboard] Re: CPU speed and kernel builds
How are you powering your BBB? I've heard that if you power it via USB instead of the 5V DC connector, that the CPU speed will be reduced due to the lower power. On 21 March 2014 10:38, Dennis Cote denn...@harding.ca wrote: On Friday, March 21, 2014 8:24:50 AM UTC-6, cwrse...@gmail.com wrote: Okay, I'm officially confused. I've been trying to increase the speed of my BBB from the default 550MHz to 1GHz, and failing; How are you measuring the CPU frequency? I have noticed that cpufreq-info gives different answers depending upon the arguments. With no arguments mine always returns 300 MHz when running with the 300 1000 ondemand governor. If I use the cpufreq-info -f command I get the same results, always 300 MHz, both at idle and under load. If I use the sudo cpufreq-info -w command, I get 300 MHz at idle and 1000 MHz under load. The -w option reads the frequency from the hardware and requires root privledges. HTH Dennis Cote -- 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.
Re: [beagleboard] Re: CPU speed and kernel builds
That only applies to the BeagleBone White. Gerald On Fri, Mar 21, 2014 at 12:34 PM, Scott Force scooby.fo...@gmail.comwrote: How are you powering your BBB? I've heard that if you power it via USB instead of the 5V DC connector, that the CPU speed will be reduced due to the lower power. On 21 March 2014 10:38, Dennis Cote denn...@harding.ca wrote: On Friday, March 21, 2014 8:24:50 AM UTC-6, cwrse...@gmail.com wrote: Okay, I'm officially confused. I've been trying to increase the speed of my BBB from the default 550MHz to 1GHz, and failing; How are you measuring the CPU frequency? I have noticed that cpufreq-info gives different answers depending upon the arguments. With no arguments mine always returns 300 MHz when running with the 300 1000 ondemand governor. If I use the cpufreq-info -f command I get the same results, always 300 MHz, both at idle and under load. If I use the sudo cpufreq-info -w command, I get 300 MHz at idle and 1000 MHz under load. The -w option reads the frequency from the hardware and requires root privledges. HTH Dennis Cote -- 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.
Re: [beagleboard] Re: CPU speed and kernel builds
We test the boards at the factory at 1GHz on USB and DC prior to shipping. The issue there is if you have a SD card, then that can exceed the 500mA when it is being hit hard. Default is the governor is active and it runs at 300MHz so unless you give it something meaningful to do, it sits at 300MHz. Load it up, and it goes to 1GHz. Gerald On Fri, Mar 21, 2014 at 12:37 PM, William Hermans yyrk...@gmail.com wrote: That would be false, but ive heard teh same stories. I run my own BBB from USB, and at idle it runs at 300Mhz, then once under a load of 66% or greater it will swing up to 1Ghz. ondemand governor I do believe. On Fri, Mar 21, 2014 at 10:34 AM, Scott Force scooby.fo...@gmail.comwrote: How are you powering your BBB? I've heard that if you power it via USB instead of the 5V DC connector, that the CPU speed will be reduced due to the lower power. On 21 March 2014 10:38, Dennis Cote denn...@harding.ca wrote: On Friday, March 21, 2014 8:24:50 AM UTC-6, cwrse...@gmail.com wrote: Okay, I'm officially confused. I've been trying to increase the speed of my BBB from the default 550MHz to 1GHz, and failing; How are you measuring the CPU frequency? I have noticed that cpufreq-info gives different answers depending upon the arguments. With no arguments mine always returns 300 MHz when running with the 300 1000 ondemand governor. If I use the cpufreq-info -f command I get the same results, always 300 MHz, both at idle and under load. If I use the sudo cpufreq-info -w command, I get 300 MHz at idle and 1000 MHz under load. The -w option reads the frequency from the hardware and requires root privledges. HTH Dennis Cote -- 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. -- 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.
