Re: [beagleboard] Setting the CPU speed.
Could altering the frequency be considered a power saving feature? -- 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] Setting the CPU speed.
On Monday, March 17, 2014 3:28:57 PM UTC, Charles Steinkuehler wrote: On 3/16/2014 9:59 AM, cwrse...@gmail.com javascript: wrote: Whatever happens, the frequency stays at 550 MHz. All ideas welcome - Will Are you running from the DC power jack? The board is limited to 550 MHz if you use USB power to avoid drawing more current than USB can provide. No, I'm running off the DC power jack. Suspicious, though, that the BBB is using 550 MHz which doesn't seem to be one of the standard speed steps. I've wondered about that. Will -- 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] Setting the CPU speed.
No, I'm running off the DC power jack. Suspicious, though, that the BBB is using 550 MHz which doesn't seem to be one of the standard speed steps. I've wondered about that. Sounds like a misconfigured kernel.. uname -r would help Regards, -- Robert Nelson http://www.rcn-ee.com/ -- 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] Setting the CPU speed.
On 3/16/2014 9:59 AM, cwrseckf...@gmail.com wrote: Whatever happens, the frequency stays at 550 MHz. All ideas welcome - Will Are you running from the DC power jack? The board is limited to 550 MHz if you use USB power to avoid drawing more current than USB can provide. -- Charles Steinkuehler char...@steinkuehler.net -- 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] Setting the CPU speed.
Sorry, I should have said that I'd tried cpuinfo. I can change the governor (with -g), but not the frequency: tuppence ~ # cpufreq-set -f 1000MHz tuppence ~ # 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 userspace may decide which speed to use within this range. current CPU frequency is 550 MHz (asserted by call to hardware). cpufreq stats: 300 MHz:nan%, 600 MHz:nan%, 800 MHz:nan%, 1000 MHz:nan% tuppence ~ # Whatever happens, the frequency stays at 550 MHz. All ideas welcome - Will -- 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.
[beagleboard] Setting the CPU speed.
I've been looking at the speed of my BBB and not really understanding what's going on. The files under /sys/devices/system/cpu/cpu0/cpufreq show that the performance governor is in use, but the speed is a constant 550,000 whatever the load. The scaling_setspeed unsupported entry probably reflects this; does anyone know how I set up a kernel to handle the BBB's CPU speed control? (This is on debian, btw) Thanks - Will tuppence ~ # cpuspeed.sh affected_cpus 0 cpuinfo_cur_freq 55 cpuinfo_max_freq 100 cpuinfo_min_freq 30 cpuinfo_transition_latency 30 related_cpus 0 scaling_available_frequencies 30 60 80 100 scaling_available_governors conservative ondemand userspace powersave performance scaling_cur_freq 55 scaling_driver generic_cpu0 scaling_governor performance scaling_max_freq 100 scaling_min_freq 30 scaling_setspeed unsupported tuppence ~ # -- 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] Setting the CPU speed.
cpufreq-info cpufreq-set 2014-03-14 13:31 GMT+04:00 cwrseckf...@gmail.com: I've been looking at the speed of my BBB and not really understanding what's going on. The files under /sys/devices/system/cpu/cpu0/cpufreq show that the performance governor is in use, but the speed is a constant 550,000 whatever the load. The scaling_setspeed unsupported entry probably reflects this; does anyone know how I set up a kernel to handle the BBB's CPU speed control? (This is on debian, btw) Thanks - Will tuppence ~ # cpuspeed.sh affected_cpus 0 cpuinfo_cur_freq 55 cpuinfo_max_freq 100 cpuinfo_min_freq 30 cpuinfo_transition_latency 30 related_cpus 0 scaling_available_frequencies 30 60 80 100 scaling_available_governors conservative ondemand userspace powersave performance scaling_cur_freq 55 scaling_driver generic_cpu0 scaling_governor performance scaling_max_freq 100 scaling_min_freq 30 scaling_setspeed unsupported tuppence ~ # -- 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. -- LinkedIn - http://www.linkedin.com/in/maximpodbereznyy Company - http://www.linkedin.com/company/mentorel Facebook - https://www.facebook.com/mentorel.company -- 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] Setting the CPU speed.
Honestly unless you have a specific reason I think the default ( ondemand ) governor is probably the best. While idle for me the CPU has always been 300Mhz, and with a heavy load ( over 60% load ) the CPU goes up to 1Ghz. On Fri, Mar 14, 2014 at 4:14 AM, Maxim Podbereznyy lisar...@gmail.comwrote: cpufreq-info cpufreq-set 2014-03-14 13:31 GMT+04:00 cwrseckf...@gmail.com: I've been looking at the speed of my BBB and not really understanding what's going on. The files under /sys/devices/system/cpu/cpu0/cpufreq show that the performance governor is in use, but the speed is a constant 550,000 whatever the load. The scaling_setspeed unsupported entry probably reflects this; does anyone know how I set up a kernel to handle the BBB's CPU speed control? (This is on debian, btw) Thanks - Will tuppence ~ # cpuspeed.sh affected_cpus 0 cpuinfo_cur_freq 55 cpuinfo_max_freq 100 cpuinfo_min_freq 30 cpuinfo_transition_latency 30 related_cpus 0 scaling_available_frequencies 30 60 80 100 scaling_available_governors conservative ondemand userspace powersave performance scaling_cur_freq 55 scaling_driver generic_cpu0 scaling_governor performance scaling_max_freq 100 scaling_min_freq 30 scaling_setspeed unsupported tuppence ~ # -- 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. -- LinkedIn - http://www.linkedin.com/in/maximpodbereznyy Company - http://www.linkedin.com/company/mentorel Facebook - https://www.facebook.com/mentorel.company -- 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] Setting the CPU speed.
I would like to test my application at different lower CPU Frequencies to make sure that it would work on a custom board with a lower specced sitara processor. Could I lock the CPU at max 600 or 720 MHz ? On Friday, March 14, 2014 4:34:30 PM UTC-5, William Hermans wrote: Honestly unless you have a specific reason I think the default ( ondemand ) governor is probably the best. While idle for me the CPU has always been 300Mhz, and with a heavy load ( over 60% load ) the CPU goes up to 1Ghz. On Fri, Mar 14, 2014 at 4:14 AM, Maxim Podbereznyy lisa...@gmail.comjavascript: wrote: cpufreq-info cpufreq-set 2014-03-14 13:31 GMT+04:00 cwrse...@gmail.com javascript:: I've been looking at the speed of my BBB and not really understanding what's going on. The files under /sys/devices/system/cpu/cpu0/cpufreq show that the performance governor is in use, but the speed is a constant 550,000 whatever the load. The scaling_setspeed unsupported entry probably reflects this; does anyone know how I set up a kernel to handle the BBB's CPU speed control? (This is on debian, btw) Thanks - Will tuppence ~ # cpuspeed.sh affected_cpus 0 cpuinfo_cur_freq 55 cpuinfo_max_freq 100 cpuinfo_min_freq 30 cpuinfo_transition_latency 30 related_cpus 0 scaling_available_frequencies 30 60 80 100 scaling_available_governors conservative ondemand userspace powersave performance scaling_cur_freq 55 scaling_driver generic_cpu0 scaling_governor performance scaling_max_freq 100 scaling_min_freq 30 scaling_setspeed unsupported tuppence ~ # -- 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...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- LinkedIn - http://www.linkedin.com/in/maximpodbereznyy Company - http://www.linkedin.com/company/mentorel Facebook - https://www.facebook.com/mentorel.company -- 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...@googlegroups.com javascript:. 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] Setting the CPU speed.
On Fri, Mar 14, 2014 at 4:46 PM, Carl-Fredrik Sundström audio...@gmail.com wrote: I would like to test my application at different lower CPU Frequencies to make sure that it would work on a custom board with a lower specced sitara processor. Could I lock the CPU at max 600 or 720 MHz ? voodoo@am335x-boneblack-512mb-1:~$ sudo cpufreq-set -f 80 voodoo@am335x-boneblack-512mb-1:~$ 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 userspace may decide which speed to use within this range. current CPU frequency is 800 MHz. = BINGO cpufreq stats: 300 MHz:3.87%, 600 MHz:0.01%, 800 MHz:0.01%, 1000 MHz:96.11% (30) just use cpufreq-set -f (freq) Regards, -- Robert Nelson http://www.rcn-ee.com/ -- 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.
