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#1 2010-09-26 22:10:59

Knalltüte
Member
Registered: 2010-09-14
Posts: 7

Powermanagement C-States

Hello,

currently tuning the powermanagement of my lappy.

First some hardware info.

CPU: Athlon II X2 P320

So if i use acpitool -c it tells me different settings for the two cores.

I'll look getting it posted in here. smile

CPU type               : AMD Athlon(tm) II P320 Dual-Core Processor
  Min/Max frequency      : 800/800 MHz
  Current frequency      : 800 MHz
  Frequency governor     : powersave
  Freq. scaling driver   : powernow-k8
  Cache size             : 512 KB
  Bogomips               : 4190.74
  Bogomips               : 4191.07

  # of CPU's found       : 2

  Processor ID           : 0
  Bus mastering control  : no
  Power management       : no
  Throttling control     : yes
  Limit interface        : yes
  Active C-state         : C0
  C-states (incl. C0)    : 1
  T-state count          : 8
  Active T-state         : T0


  Processor ID           : 1
  Bus mastering control  : no
  Power management       : no
  Throttling control     : no
  Limit interface        : no
  Active C-state         : C0
  C-states (incl. C0)    : 0
  T-state count          : 96000  Active T-state         : 96000

Powertop will not give any c-state related info.

Powernow_k8 is installed.
I use HPET as clocksource.


Have you some tips?

Greetings
Michael

Last edited by Knalltüte (2010-09-26 22:43:01)

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#2 2010-09-26 22:13:59

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: Powermanagement C-States

Powertop is made by intel and it's for Intel processors, though it may give you some info about your cpu too.

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#3 2010-09-26 22:51:27

Knalltüte
Member
Registered: 2010-09-14
Posts: 7

Re: Powermanagement C-States

I updated output from acpitool first post.

Powertop tells me c-state information is not available. Complete dump:

PowerTOP 1.13   (C) 2007 - 2010 Intel Corporation 

Collecting data for 15 seconds 


< Detailed C-state information is not available.>
P-states (frequencies)
  2.10 Ghz     0.0%
  1500 Mhz     0.0%
   800 Mhz   100.0%
Wakeups-from-idle per second : 103.1    interval: 15.0s
Power usage (ACPI estimate): 16.0W (0.7 hours) 
Top causes for wakeups:
  29.4% ( 60.0)   [Rescheduling interrupts] <kernel IPI>
  17.4% ( 35.5)   [kernel scheduler] Load balancing tick
  14.5% ( 29.6)   firefox
  14.2% ( 29.0)   [extra timer interrupt]
  11.6% ( 23.7)   PS/2 keyboard/mouse/touchpad interrupt
   3.7% (  7.5)   [wlan0, ehci_hcd:usb1, ehci_hcd:usb2, ehci_hcd:usb3] <interrupt>
   3.4% (  6.9)   [kernel core] hrtimer_start (tick_sched_timer)
   2.9% (  5.9)   [kernel core] add_timer (wl_timer)
   1.0% (  2.0)   [kernel core] clocksource_watchdog (clocksource_watchdog)
   0.7% (  1.5)   [ahci] <interrupt>
   0.3% (  0.5)   hald-addon-stor
   0.2% (  0.3)   [ohci_hcd:usb4, ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7, radeon] <interrupt>
   0.1% (  0.2)   kslowd000
   0.1% (  0.2)   init
   0.1% (  0.2)   Thunar
   0.1% (  0.2)   [kernel core] laptop_io_completion (laptop_mode_timer_fn)
   0.1% (  0.2)   X
   0.1% (  0.1)   mousepad
   0.0% (  0.1)   [TLB shootdowns] <kernel IPI>
   0.0% (  0.1)   [kernel core] __enqueue_rt_entity (sched_rt_period_timer)
   0.0% (  0.1)   kslowd001
   0.0% (  0.1)   pidgin
   0.0% (  0.1)   flush-8:0
   0.0% (  0.1)   xfce4-panel

Suggestion: Enable Device Power Management by pressing the P key


Suggestion: Enable the CONFIG_PCIEASPM kernel configuration option.
PCI Link Powermanagement (ASPM) allows the hardware to go to low power mode
automatically when a PCI-E device is idle.

Recent USB suspend statistics
Active  Device name
  0.0%    USB device usb7 : OHCI Host Controller (Linux 2.6.35-ARCH ohci_hcd)
  0.0%    USB device usb6 : OHCI Host Controller (Linux 2.6.35-ARCH ohci_hcd)
  0.0%    USB device usb5 : OHCI Host Controller (Linux 2.6.35-ARCH ohci_hcd)
  0.0%    USB device usb4 : OHCI Host Controller (Linux 2.6.35-ARCH ohci_hcd)
  0.0%    USB device usb3 : EHCI Host Controller (Linux 2.6.35-ARCH ehci_hcd)
  0.0%    USB device usb2 : EHCI Host Controller (Linux 2.6.35-ARCH ehci_hcd)
  0.0%    USB device usb1 : EHCI Host Controller (Linux 2.6.35-ARCH ehci_hcd)

Runtime Device Power Management statistics
Active  Device name

Devices without runtime PM



05:00.0 Network controller: Broadcom Corporation Device 4727 
01:05.1 Audio device: ATI Technologies Inc RS880 Audio Device [Radeon HD 4200]
01:05.0 VGA compatible controller: ATI Technologies Inc M880G [Mobility Radeon HD 4200]
00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control
00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control
00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller
00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map
00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration
00:16.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:16.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2 Controller
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge 
00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller 
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) 
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller 
00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
7 more devices without runtime PM ommitted

Recent audio activity statistics
Active  Device name
  0.0%    hwC0D0 IDT 92HD88B1 

Recent SATA AHCI link activity statistics
Active    Partial    Slumber    Device name

Last edited by jasonwryan (2010-09-26 23:05:13)

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