Changes between Initial Version and Version 1 of TipAndDoc/Hardware/cpufreq


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Timestamp:
Sep 2, 2011 5:38:16 AM (9 years ago)
Author:
mitty
Comment:

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  • TipAndDoc/Hardware/cpufreq

    v1 v1  
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     3 * [http://d.hatena.ne.jp/kakurasan/20070720/p1 動的にCPUクロックや電圧を変更するcpufreqの概要とcpufreqdデーモンについて - 試験運用中なLinux備忘録] 
     4 * [http://d.hatena.ne.jp/kakurasan/20080804/p1 cpufreqdでlm_sensorsを使用して、センサの値に応じたクロック・電圧制御を行う - 試験運用中なLinux備忘録] 
     5 
     6 * [https://bugs.archlinux.org/task/15284 FS#15284 : cannot switch to ondemand governor] 
     7 > {{{ 
     8 > I have a Intel(R) Pentium(R) 4 CPU 2.66GHz 
     9 > im using p4-clockmod with ondemand and performance governors, but after upgrading to kernel 2.6.30, i cannot switch to ondemand governor  
     10 >  
     11 > from dmesg output i see: 
     12 > "ondemand governor failed, too long transition latency of HW, fallback to performance governor" 
     13 >  
     14 > Additional info: 
     15 > kernel26 2.6.30-5 
     16 >  
     17 > Steps to reproduce: 
     18 > cpufreq-set -g ondemand 
     19 > }}} 
     20 > * comment by Jan de Groot (JGC) - Saturday, 27 June 2009, 07:33 GMT-4 
     21 >  * You should not use ondemand with clockmod. The clockmod module has a very high switching latency, that's why it's disabled in 2.6.30. The error message says it all I think. 
     22 * [https://bbs.archlinux.org/viewtopic.php?id=101464 cpufreq ondemand governor problem with p4-clockmod |SOLVED| (Page 1) / Kernel & Hardware / Arch Linux Forums]