Fedora 9 powertop results
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)
