[arm-allstar] Turbo Mode

[David McGough]

Steve,

If you see: cpuinfo_min_freq = 600 MHz  ...then turbo mode is off.  Even 
with it off, the CPU will still burst to the max frequency (1200).

I use these coolers on the SoC chips and no other heatsinks:

https://www.ebay.com/itm/331971574352

...They're pricey but I've found them to get the job done. I have the
RPi3B's placed where a little air from the repeater PA fan hits them, too.
...Not a blast, just a very gentle breeze.

The highest core temp I've seen so far was 44C. ....And, that was with a 
free-space cabinet temp of 106F. I'm sure the air off the heatsink was 
HOT.

73, David KB4FXC


On Fri, 22 Jun 2018, "Steve Agee via arm-allstar" wrote:

> I have a Pi 3b at a site where the commercial air conditioning has 
> failed. The cpu_stats.sh is reporting the temperature in red. I'm trying 
> to run:
> [root at asterisk]# cpu_turbo.sh off
> 
> and I'm getting the reply:
> "Turbo Mode set to OFF at next reboot"
> 
> But when it reboots, it still shows as in turbo mode:
> cpuinfo_cur_freq = 1200 MHz.
> cpuinfo_max_freq = 1200 MHz.
> cpuinfo_min_freq = 600 MHz.
> 
> I'm just trying to keep it from burning up until the A/C gets fixed. 
> What am I doing wrong that I cannot turn off turbo mode?
> 
> N5ZUA
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