Bug#607924: Power management
On Feb 19 2011, Phillip Susi wrote:
> On 02/19/2011 09:18 PM, Rogério Brito wrote:
> >And even if p4-clockmod is fixed, there are other arches (read: PowerPC)
> >where the same with p4-clockmod is true.
>
> I'm still wondering how p4-clockmod can be controlled with a
> userspace governor, but not any of the kernel ones.
Oh, dear:
,----[ powernowd -d -v -v -v -n -l 10 ]
| Using lower pct of 10%
| PowerNow Daemon v1.00, (c) 2003-2008 John Clemens
| Settings:
| verbosity: 3
| mode: 1 (AGGRESSIVE)
| step: 100 MHz (100000 kHz)
| lowwater: 10 %
| highwater: 80 %
| poll interval: 1000 ms
| about to return count = 1
| Found 2 scalable units: -- 1 'CPU' per scalable unit
| cpu0: 333Mhz - 2666Mhz (8 steps)
| step1 : 2666Mhz
| step2 : 2333Mhz
| step3 : 1999Mhz
| step4 : 1666Mhz
| step5 : 1333Mhz
| step6 : 999Mhz
| step7 : 666Mhz
| step8 : 333Mhz
| cpu1: 333Mhz - 2666Mhz (8 steps)
| step1 : 2666Mhz
| step2 : 2333Mhz
| step3 : 1999Mhz
| step4 : 1666Mhz
| step5 : 1333Mhz
| step6 : 999Mhz
| step7 : 666Mhz
| step8 : 333Mhz
| Setting speed to 2333275
| Setting speed to 1999950
| Setting speed to 1666625
| Setting speed to 1333300
| Setting speed to 999975
| Setting speed to 2333275
| Setting speed to 1999950
| Setting speed to 1666625
| Setting speed to 666650
| Setting speed to 333325
| Setting speed to 1333300
| Setting speed to 999975
| Setting speed to 666650
| Setting speed to 333325
| Setting speed to 2666600
| Setting speed to 2333275
| Setting speed to 1999950
| Setting speed to 1666625
| Setting speed to 1333300
| Setting speed to 999975
| Setting speed to 666650
| Setting speed to 333325
| Setting speed to 2666600
| Setting speed to 2333275
| Setting speed to 1999950
| Setting speed to 1666625
| Setting speed to 1333300
| Setting speed to 999975
| Setting speed to 666650
| Setting speed to 333325
| ^CSetting speed to 2666600
| Setting speed to 2666600
| Statistics:
| 32 speed changes in 105 seconds
| PowerNow Daemon Exiting.
`----
> Are you guessing about PowerPC or do you know of a specific problem with
> their scaling driver that prevents it from working with the kernel
> governors?
No, I am *not* guessing. I *have* PowerPC boxes. They suffer the same "too
high latency" stuff from ondemand/conservative governors.
Regards,
--
Rogério Brito : rbrito@{ime.usp.br,gmail.com} : GPG key 4096R/BCFCAAAA
http://rb.doesntexist.org : Packages for LaTeX : algorithms.berlios.de
DebianQA: http://qa.debian.org/developer.php?login=rbrito%40ime.usp.br
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