关于cpu 降频的问题

dutongtie

为什么windows下和linux下面的最小频率不一样，例如在windows下会出现600M、而linux 最小是800。

2. # cpufreq-info
4. cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
5. Report errors and bugs to cpufreq@vger.kernel.org, please.
6. analyzing CPU 0:
7.   driver: acpi-cpufreq
8.   CPUs which run at the same hardware frequency: 0 1
9.   CPUs which need to have their frequency coordinated by software: 0
10.   maximum transition latency: 10.0 us.
11.   hardware limits: 800 MHz - 2.10 GHz
12.   available frequency steps: 2.10 GHz, 2.10 GHz, 1.60 GHz, 1.20 GHz, 800 MHz
13.   available cpufreq governors: conservative, ondemand, powersave, userspace, performance
14.   current policy: frequency should be within 800 MHz and 2.10 GHz.
15.                   The governor "ondemand" may decide which speed to use
16.                   within this range.
17.   current CPU frequency is 800 MHz (asserted by call to hardware).
18. analyzing CPU 1:
19.   driver: acpi-cpufreq
20.   CPUs which run at the same hardware frequency: 0 1
21.   CPUs which need to have their frequency coordinated by software: 1
22.   maximum transition latency: 10.0 us.
23.   hardware limits: 800 MHz - 2.10 GHz
24.   available frequency steps: 2.10 GHz, 2.10 GHz, 1.60 GHz, 1.20 GHz, 800 MHz
25.   available cpufreq governors: conservative, ondemand, powersave, userspace, performance
26.   current policy: frequency should be within 800 MHz and 2.10 GHz.
27.                   The governor "ondemand" may decide which speed to use
28.                   within this range.
29.   current CPU frequency is 800 MHz (asserted by call to hardware).

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available frequency steps 识别是否有问题？？
有人知道吗？？

而且我在snow leopard里面查询到是有13档 最低档是600M

liwangli

楼主啥U啊,怎么用的是通用的ACPI模块.
像我用AMD的三核,用的是powernow-k8,intel处理器也应该有自己的模块吧.加载正确模块就应该能正确调频了吧

cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: powernow-k8
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 8.0 us.
  hardware limits: 800 MHz - 2.90 GHz
  available frequency steps: 2.90 GHz, 2.20 GHz, 1.70 GHz, 800 MHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 800 MHz and 2.90 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.
analyzing CPU 1:
  driver: powernow-k8
  CPUs which run at the same hardware frequency: 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 8.0 us.
  hardware limits: 800 MHz - 2.90 GHz
  available frequency steps: 2.90 GHz, 2.20 GHz, 1.70 GHz, 800 MHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 800 MHz and 2.90 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.
analyzing CPU 2:
  driver: powernow-k8
  CPUs which run at the same hardware frequency: 2
  CPUs which need to have their frequency coordinated by software: 2
  maximum transition latency: 8.0 us.
  hardware limits: 800 MHz - 2.90 GHz
  available frequency steps: 2.90 GHz, 2.20 GHz, 1.70 GHz, 800 MHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 800 MHz and 2.90 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 800 MHz.

dutongtie

我现在是能降频的，不过只是和windows不一样，就是最低频率在windows下是600M，而linux里面是800M, 所以我觉得奇怪，好象linux里面不能识别所有可用于降频的cpu频率，这样linux里面温度会比windows里面高点的。

我是intel Core2 Duo T8100 （主频是2.1G）
驱动用的是 ACPI Processor P-States driver

1. 
   
2.       *** CPUFreq processor drivers ***                          │ │  
   
3.   │ │    < >   Processor Clocking Control interface driver                │ │  
   
4.   │ │    <*>   ACPI Processor P-States driver                             │ │  
   
5.   │ │    < >   AMD Opteron/Athlon64 PowerNow!                             │ │  
   
6.   │ │    < >   Intel Enhanced SpeedStep (deprecated)                      │ │  
   
7.   │ │    < >   Intel Pentium 4 clock modulation      
   

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pdfan

--- /toor/etc/cpufreqd.conf.===        2010-03-10 08:28:30.000000000 +0800
+++ /etc/cpufreqd.conf        2010-07-19 17:54:26.000000000 +0800
@@ -3,15 +3,16 @@

[General]
pidfile=/var/run/cpufreqd.pid
-poll_interval=2
+#=== poll_interval=2
+poll_interval=12
verbosity=4
-#enable_remote=1
-#remote_group=root
+enable_remote=1
+remote_group=root
[/General]

-#[acpi]
-#acpid_socket=/var/run/acpid.socket
-#[/acpi]
+[acpi]
+acpid_socket=/var/run/acpid.socket
+[/acpi]

#[nforce2_atxp1]
#vcore_path=/some/path
@@ -65,13 +66,13 @@
policy=powersave
[/Profile]

-#[Profile]
-#name=Conservative High
-#minfreq=33%
-#maxfreq=100%
-#policy=conservative
-#[/Profile]
-#
+[Profile]
+name=Conservative High
+minfreq=33%
+maxfreq=100%
+policy=conservative
+[/Profile]
+
#[Profile]
#name=Conservative Low
#minfreq=0%
@@ -86,7 +87,8 @@
[Rule]
name=AC Rule
ac=on                    # (on/off)
-profile=Performance High
+#=== profile=Performance High
+profile=Conservative High
[/Rule]
  
# conservative mode when not AC

freeobject

Post by pdfan;2104893
--- /toor/etc/cpufreqd.conf.===        2010-03-10
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# conservative mode when not AC

关于cpu降压，请看 http://www.linuxsir.cn/bbs/thread350360.html 搞了一下phc-intel, 提高cpu最低频

签名很有意思，其实世界最大的恶敌是小曰本及其在中国及全球各地b红色证权走狗。