Fedora 9 powertop results

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Latest revision as of 23:59, 14 October 2011

    PowerTOP version 1.9       (C) 2007 Intel Corporation
Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        (12.0%)         2.11 Ghz    28.2%
C1                0.0ms ( 0.0%)         1.60 Ghz     1.0%
C2                0.2ms ( 0.6%)         1200 Mhz     0.8%
C3                1.6ms (87.3%)          800 Mhz    70.0%


Wakeups-from-idle per second : 568.1 interval: 15.0s

Power usage (ACPI estimate): 16.1W (1.9 hours)

Top causes for wakeups:
 70.6% (406.2)       <interrupt> : PS/2 keyboard/mouse/touchpad 
 14.8% ( 85.4)      <kernel IPI> : Rescheduling interrupts 
  3.6% ( 20.9)              Xorg : schedule_timeout (process_timeout) 
  2.6% ( 14.8)       <interrupt> : iwl3945 
  1.7% (  9.8)       <interrupt> : ata_piix
  1.3% (  7.6)       <interrupt> : ehci_hcd:usb2, uhci_hcd:usb5
  1.2% (  6.8)    gnome-terminal : schedule_timeout (process_timeout)
  1.0% (  6.0)   USB device  2-6 : USB2.0-CRW (Generic)
  0.9% (  5.0)   gnome-system-mo : schedule_timeout (process_timeout)
  0.4% (  2.4)       <interrupt> : acpi
  0.2% (  1.1)   <kernel module> : neigh_table_init_no_netlink (neigh_periodic_timer)
  0.2% (  1.0)    cpufreq-applet : schedule_timeout (process_timeout)
  0.2% (  0.9)   hald-addon-stor : schedule_timeout (process_timeout)
  0.2% (  0.9)     <kernel core> : ehci_work (ehci_watchdog)
  0.1% (  0.6)       <interrupt> : ahci
  0.1% (  0.5)           iwl3945 : ieee80211_sta_work (ieee80211_sta_timer)

Suggestion: Disable 'hal' from polling your cdrom with:

 hal-disable-polling --device /dev/scd0 

'hal' is the component that auto-opens a window if you plug in a CD but disables SATA power saving from kicking in.

Q - Quit   R - Refresh   K - kill hald-addon-storage


ASUS F9E-2P174

Intel Core 2 Duo T8100 2.1GHz, 
1GB RAM, 120GB HDD, 
VGA Intel GMA X3100, 
12.1 inch screen

[fa9@asus ~]$ uname -a

 Linux asus 2.6.25.14-108.fc9.i686 #1 SMP Mon Aug 4 14:08:11 EDT 2008 i686 i686 i386 GNU/Linux

As Normal, laptop was at 16v something

Contents

writeback

Suggestion: increase the VM dirty writeback time from 4.99 to 15 seconds with:

 echo 1500 > /proc/sys/vm/dirty_writeback_centisecs

This wakes the disk up less frequenty for background VM activity

so to reverse this I guess you'd do

 echo 500 > /proc/sys/vm/dirty_writeback_centisec

|Done, no visible change|

OpticalDrivePolling

Suggestion: Disable 'hal' from polling your cdrom with:

 hal-disable-polling --device /dev/scd0

'hal' is the component that auto-opens a window if you plug in a CD but disables SATA power saving from kicking in.

to revert, I assume it will be:

 hal-disable-polling --device /dev/scd0

|Done, not much changes either, keeps on complaining I should diable but it's done already and reported as such by my system|

Spare some on the HDD

Suggestion: Enable SATA ALPM link power management via:

 echo min_power > /sys/class/scsi_host/host0/link_power_management_policy

How to reverese this one??? echo max_power looks delirious...

|Done anyway, won a full half volt out of it. Cool|

End Result

Now around 13.5v I am NOT happy with this lappie. 2 hours to 2.5 if lucky hours max.

powertop says

Power usage (ACPI estimate): 13.0W (3.0 hours)
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