cooling down the system by software

[Romeo]

anybody implement cpufreq-info/cpufreq-set (package) on UnRaid?

this package allow lower cpu frequency when idle, to save electricity and be cool.

 

for example my squeeze server

squeeze:~# cpufreq-info

cpufrequtils 007: cpufreq-info © Dominik Brodowski 2004-2009

Report errors and bugs to [email protected], please.

analyzing CPU 0:

 driver: powernow-k7

 CPUs which run at the same hardware frequency: 0

 CPUs which need to have their frequency coordinated by software: 0

 maximum transition latency: 200 us.

 hardware limits: 667 MHz - 1.00 GHz

 available frequency steps: 667 MHz, 800 MHz, 1.00 GHz

 available cpufreq governors: powersave, conservative, userspace, ondemand, performance

 current policy: frequency should be within 667 MHz and 1.00 GHz.

                 The governor "ondemand" may decide which speed to use

                 within this range.

 current CPU frequency is 1.00 GHz (asserted by call to hardware).

cpufreq stats: 667 MHz:88.74%, 800 MHz:0.12%, 1.00 GHz:11.15%  (126789)

[Romeo]

any one success install cpufreq package?

[BRiT]

You first need to have all the proper kernel options setup in the unRAID distro. The proper kernel options were enabled in the short-lived and ill-fated 4.5.7 and 4.5.8 releases but have been removed in the 4.6 release. You can't get anywhere without proper kernel support.

 

Ideally that software packaged should be included in the next base unRAID 5.0 beta 3 release as well as the needed kernel options and modules.

[kizer]

I saw this earlier and honestly I think it would be a great idea. My phone does it of all things which is really nice because when I'm not using it meaning screen off and it sitting there it sips on battery power all day at 400MHZ and then when I pick it up to use it, it ramps up to 1.2GHZ. The battery savings alone has been HUGE. Sure the concern isn't Battery power, but it would be nice to keep the house power low and the case heat cool.

 

I know the numbers are not even close to a PC, but I went from

Normal Clock Speed all day - 16hours of use normally I would have 35-40% before shutting off.

Under Clocked with a variable - 16hours of use normally 50-70% before shutting off

 

Normal use meaning some calls, some emails playing on the internet.

[Romeo]

there huge waste of power, like 170W when all 8 is spinned up, and like 90W when idle...i beliave possible to low to 20-25W.

every 10W a day it's 130gram Co2

so 50W of saving it's  650gramm Co2 a day!!!

 

Tom, please compilte cpu scalling feature into the kernel - it's will be your contribution to the preservation of the environment.

[bubbaQ]

every 10W a day it's 130gram Co2

so 50W of saving it's  650gramm Co2 a day!!!

 

Where do treeehuggers come up with this crap?

 

i beliave possible to low to 20-25W.

 

Not with more than 2 drives.  Frequency scaling alone saves almost nothing.  Undervolting is what is necessary to save power, and that won't save as much as you think.  On many mobos, the Northbridge pulls nearly as much juice as the CPU.

 

And efficiencies of the PSU are not going to be high at both low power and at usage power... you have to pick a happy medium.  Get large, green drives, and minimize the number of drives, pick a low-power chipset (AMD or nvidia rather than Intel) and low-power CPU, and the smallest  80+ Gold certified PSU that fits your rig's specs.

[Romeo]

bubbaQ from here

 

 

when i say 20-25W it's with parked drivers, that most state of the storage. at night, at middle of the day.

 

[kizer]

every 10W a day it's 130gram Co2

so 50W of saving it's  650gramm Co2 a day!!!

 

Where do treeehuggers come up with this crap?

 

i beliave possible to low to 20-25W.

 

Not with more than 2 drives.  Frequency scaling alone saves almost nothing.  Undervolting is what is necessary to save power, and that won't save as much as you think.  On many mobos, the Northbridge pulls nearly as much juice as the CPU.

 

And efficiencies of the PSU are not going to be high at both low power and at usage power... you have to pick a happy medium.  Get large, green drives, and minimize the number of drives, pick a low-power chipset (AMD or nvidia rather than Intel) and low-power CPU, and the smallest  80+ Gold certified PSU that fits your rig's specs.

 

BubbaQ I think your very right with the example I gave. The kernel I was running was a scaleable Clock speed and it was undervolted.

[bubbaQ]

bubbaQ from here

 

People will believe almost anything the read on the internets.  As a chemical engineer for 25 years, I can tell you quite confidently that such numbers are horsehockey.  In fact, they vary so widely that no single number is correct.

 

Mobile devices are much more aggressive with power savings than desktops.... that is why some mITX systems actually use mobile CPUs since they have much more aggressive power saving features.  You can't compare those to a desktop mobo.  Even some Atoms have crappy systems that waste heat.... so just picking a CPU does not guarantee anything.

 

Check SPCR since waste energy comes out as heat, and heat means fans are needed to cool which means noise.... so the folks at SPCR are very concerned with heat, and their lab generally does things right in testing.