BIOS不支持導致Linux內核耗電增加

http://linux.solidot.org/article.pl?sid=11/10/08/0323217

幾個月前,Phoronix報導說,自Linux 2.6.38開始,移動Linux用戶發現電力消耗迅速飈升,電池續航時間迅速減少,它聲稱電源退化問題是PCI接口動態電源管理(ASPM)中的一個改變導致的。現在,它再次報導稱Linux 3.0和3.1都沒有解決電源退化問題。實際上,耗電量增加並不是內核,而是BIOS不支持ASPM導致的。ASPM設計是讓PCI接口設備在空閒時進入低耗電狀態,以節省電力。然而,如果BIOS通知內核它不支持ASPM,但不知為何BIOS卻仍然在某些設備上默認啟用ASPM,問題就出現了。RedHat內核開發者已經發佈了補丁修正問題:補丁的功能是讓BIOS不支持ASPM時讓ASPM進入關閉狀態。但關閉ASPM會導致耗電量略微上升,筆記本用戶可以使用Jupiter或tuned優化電力消耗。

按: 有冇 C Hing 用過 Jupiter 或 tuned ? 有冇用 ?

http://linux.solidot.org/article.pl?sid=11/10/08/0323217
handsomepork 發表於 2011-10-8 23:18


個網站抄得好似下http://slashdot.org/

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個網站抄得好似下
computer1975 發表於 2011-10-9 11:39



本身就係用同一套 Web App。。。

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回復 3# liangsuilong

個名都抵死,二個尾都係dot

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An anonymous reader writes "The significant Linux kernel power regression reported back in April, which ended up being attributed to PCI-E Active State Power Management, is still not resolved even as Ubuntu 11.10 and Fedora 16 approach. Until Linux is able to handle ASPM in a manner more like Windows or the device drivers explicitly set the ASPM flag, users of many modern laptops need to use the "pcie_aspm=force" option to regain much of their battery life. At least a power bug affecting newer Intel hardware with the "energy performance bias" feature has been fixed. There's more information in this LaunchPad bug report and in the latest power consumption testing."

source:http://linux.slashdot.org/story/ ... -usage-remains-high

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