Hello,
Using kernel:
2.6.18-92.1.13.el5.centos.plus
the cpu throttling works as desired (see 2 traces below)
------------- trace snips --------------
dmesg | grep -i pow
ACPI: SSDT (v001 PTLTD POWERNOW 0x00000001 LTP 0x00000001) @ 0x3fff9b40
powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ processors (
2 cpu cores) (version 2.20.00)
powernow-k8: 0 : fid 0x10 (2400 MHz), vid 0x8
powernow-k8: 1 : fid 0xe (2200 MHz), vid 0xa
powernow-k8: 2 : fid 0xc (2000 MHz), vid 0xc
powernow-k8: 3 : fid 0xa (1800 MHz), vid 0xe
powernow-k8: 4 : fid 0x2 (1000 MHz), vid 0x12
ACPI: Power Button (FF) [PWRF]
ACPI: Power Button (CM) [PWRB]
#cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux at brodo.de, please.
analyzing CPU 0:
driver: powernow-k8
CPUs which need to switch frequency at the same time: 0 1
hardware limits: 1000 MHz - 2.40 GHz
available frequency steps: 2.40 GHz, 2.20 GHz, 2.00 GHz, 1.80 GHz, 1000 MHz
available cpufreq governors: ondemand, userspace, performance
current policy: frequency should be within 1000 MHz and 2.40 GHz.
The governor "ondemand" may decide which speed to
use
within this range.
current CPU frequency is 1000 MHz (asserted by call to hardware).
(ditto for cpu 1)
------------- end snip ----------
When I update to the newer xx-128.1.6 centosplus kernel all the throttling stops
and the box runs at highest speed.
I noticed that the 92* kernel has no separate powernow-k8.ko module, while the
128* kernel does. Does this module now need to be force loaded?
This box is used as a desktop.
--
Mark
On Thu, 2009-04-09 at 22:39 -0700, Mark Pryor wrote:> Hello, > > Using kernel: > 2.6.18-92.1.13.el5.centos.plus > > the cpu throttling works as desired (see 2 traces below) > > ------------- trace snips -------------- > dmesg | grep -i pow > ACPI: SSDT (v001 PTLTD POWERNOW 0x00000001 LTP 0x00000001) @ 0x3fff9b40 > powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ processors ( 2 cpu cores) (version 2.20.00) > powernow-k8: 0 : fid 0x10 (2400 MHz), vid 0x8 > powernow-k8: 1 : fid 0xe (2200 MHz), vid 0xa > powernow-k8: 2 : fid 0xc (2000 MHz), vid 0xc > powernow-k8: 3 : fid 0xa (1800 MHz), vid 0xe > powernow-k8: 4 : fid 0x2 (1000 MHz), vid 0x12 > ACPI: Power Button (FF) [PWRF] > ACPI: Power Button (CM) [PWRB] > > #cpufreq-info > cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006 > Report errors and bugs to linux at brodo.de, please. > analyzing CPU 0: > driver: powernow-k8 > CPUs which need to switch frequency at the same time: 0 1 > hardware limits: 1000 MHz - 2.40 GHz > available frequency steps: 2.40 GHz, 2.20 GHz, 2.00 GHz, 1.80 GHz, 1000 MHz > available cpufreq governors: ondemand, userspace, performance > current policy: frequency should be within 1000 MHz and 2.40 GHz. > The governor "ondemand" may decide which speed to use > within this range. > current CPU frequency is 1000 MHz (asserted by call to hardware). > (ditto for cpu 1) > > ------------- end snip ---------- > > When I update to the newer xx-128.1.6 centosplus kernel all the throttling stops and the box runs at highest speed. > > I noticed that the 92* kernel has no separate powernow-k8.ko module, while the 128* kernel does. Does this module now need to be force loaded? > > This box is used as a desktop. > ---Have a look at /etc/sysconf/apmd CPUFREQ="performance" And /etc/sysconfig/cpuspeed Self explanatory. Also there is a Gnome Applet you can add to the Gnome Panel called cpufreq scalling monitor. "The Easy Way" To use the above you may have to load the correct driver for them and restart the cpuspeed service. JohnStanley
On Thu, 2009-04-09 at 22:39 -0700, Mark Pryor wrote:> Does this module now need to be force loaded?--- Ohh! Also yes, some of the modules have to be manualy loaded as per RedHat Documentation and CentOS Documentation.. JohnStanley
Mark Pryor wrote on Thu, 9 Apr 2009 22:39:53 -0700 (PDT):> When I update to the newer xx-128.1.6 centosplus kernel all the throttling > stops and the box runs at highest speed.FYI: It works like before with the normal kernels, no problems. Kai -- Kai Sch?tzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com
Mark Pryor wrote:> Using kernel: > 2.6.18-92.1.13.el5.centos.plus > the cpu throttling works as desired (see 2 traces below)...> When I update to the newer xx-128.1.6 centosplus kernel all the throttling stops and the box runs at highest speed.This is an issue that came up in the early 5.2 days, and has been recurring since. I lost cpuspeed control on my desktop at home as well ( amdx24800/m2n) with the kernel update. Have not started digging into this, but the last time I did upstream blamed it on badly done acpi code in the system BIOS. It *should* now be possible to blacklist the powernow-k8.ko code and let the kernel fallback to using the generic acpi layer again. YMMV. -- Karanbir Singh : http://www.karan.org/ : 2522219 at icq