reducing power usage of Fedora - how you can help!

[Robert M. Albrecht]

Hi,

powertop -d from my standard idle desktop.

Firefox, Thunderbird and Pidgin are running in the background.

It seems, the wlan card is pure evil :-O

cu romal


[root at helios ~]# powertop -d
PowerTOP 1.7    (C) 2007 Intel Corporation

Sammle Daten für 5 Sekunden
Cn          Avg residency (5s)
C0 (Prozessor läuft)    (10,7%)
C1                0,0ms ( 0,0%)
C2                3,9ms (83,6%)
C3                5,3ms ( 5,8%)
P-states (frequencies)
  1,86 GHz     3,4%
  1,60 GHz     0,0%
  1060 MHz     0,4%
   800 MHz    96,2%
Wakeups-from-idle per second : 223,4
Keine ACPI Stromverbrauch-Schätzung verfügbar
Top causes for wakeups:
  28,7% ( 77,0)       <interrupt> : ipw2200
  15,7% ( 42,2)       S06cpuspeed : queue_delayed_work_on
(delayed_work_timer_fn)
   5,4% ( 14,6)                 X : do_setitimer (it_real_fn)
   5,1% ( 13,8)   at-spi-registry : schedule_timeout (process_timeout)
   4,5% ( 12,0)       firefox-bin : futex_wait (hrtimer_wakeup)
   4,2% ( 11,4)             pcscd : schedule_timeout (process_timeout)
   4,2% ( 11,2)       <interrupt> : uhci_hcd:usb4, HDA Intel
   3,7% ( 10,0)     <kernel core> : ehci_work (ehci_watchdog)
   3,7% ( 10,0)   <kernel module> : sky2_probe (sky2_idle)
   3,7% ( 10,0)   /usr/bin/sealer : schedule_timeout (process_timeout)
   3,3% (  8,8)       <interrupt> : libata
   2,1% (  5,6)   hald-addon-acpi : schedule_timeout (process_timeout)
   1,8% (  4,8)   thunderbird-bin : futex_wait (hrtimer_wakeup)
   1,5% (  4,0)   <kernel module> : usb_hcd_poll_rh_status (rh_timer_func)
   1,2% (  3,2)             fnfxd : do_nanosleep (hrtimer_wakeup)
   1,1% (  3,0)       <interrupt> : eth1
   1,0% (  2,6)             pcscd : do_nanosleep (hrtimer_wakeup)
   1,0% (  2,6)   <kernel module> : ipw_up (delayed_work_timer_fn)
   0,9% (  2,4)    gnome-terminal : schedule_timeout (process_timeout)
   0,9% (  2,4)     <kernel core> : uhci_scan_schedule (uhci_fsbr_timeout)
   0,8% (  2,2)       <interrupt> : uhci_hcd:usb2, ahci
   0,7% (  2,0)   multiload-apple : schedule_timeout (process_timeout)
   0,4% (  1,0)     <kernel core> : queue_delayed_work_on
(delayed_work_timer_fn)
   0,4% (  1,0)            dhcdbd : schedule_timeout (process_timeout)
   0,4% (  1,0)    cpufreq-applet : schedule_timeout (process_timeout)
   0,4% (  1,0)         automount : futex_wait (hrtimer_wakeup)
   0,4% (  1,0)         nm-applet : schedule_timeout (process_timeout)
   0,2% (  0,6)   <kernel module> : neigh_table_init_no_netlink
(neigh_periodic_timer)
   0,2% (  0,6)        gam_server : schedule_timeout (process_timeout)
   0,2% (  0,6)    NetworkManager : schedule_timeout (process_timeout)
   0,2% (  0,6)   gnome-vfs-daemo : schedule_timeout (process_timeout)
   0,1% (  0,4)                 X : schedule_timeout (process_timeout)
   0,1% (  0,4)            pidgin : schedule_timeout (process_timeout)
   0,1% (  0,4)     <kernel core> : sk_reset_timer (tcp_delack_timer)
   0,1% (  0,4)    sensors-applet : schedule_timeout (process_timeout)
   0,1% (  0,4)     <kernel core> : neigh_table_init_no_netlink
(neigh_periodic_timer)
   0,1% (  0,4)   hald-addon-stor : schedule_timeout (process_timeout)
   0,1% (  0,4)     <kernel core> : neigh_update (neigh_timer_handler)
   0,1% (  0,2)       <interrupt> : i8042
   0,1% (  0,2)   pam_timestamp_c : schedule_timeout (process_timeout)
   0,1% (  0,2)              init : schedule_timeout (process_timeout)
   0,1% (  0,2)         ssh-agent : do_setitimer (it_real_fn)
   0,1% (  0,2)            pidgin : sk_reset_timer (tcp_write_timer)
   0,1% (  0,2)   gnome-power-man : schedule_timeout (process_timeout)
   0,1% (  0,2)         S99smartd : __netdev_watchdog_up (dev_watchdog)
   0,1% (  0,2)    mapping-daemon : schedule_timeout (process_timeout)
   0,1% (  0,2)     <kernel core> : page_writeback_init (wb_timer_fn)
   0,1% (  0,2)             cupsd : schedule_timeout (process_timeout)
   0,1% (  0,2)             pcscd : uhci_scan_schedule (uhci_fsbr_timeout)
   0,1% (  0,2)       gnome-panel : schedule_timeout (process_timeout)
[root at helios ~]#


Bill Nottingham schrieb:
> Would you like your laptop battery to last longer? Would you like your
> servers to use less electricity? We certainly would. So we're investigating
> and fixing Fedora to use less juice.
> 
> One of the biggest power problems is apps that wake up the CPU
> unnecessarily. With the tickless kernel for x86 (and soon x86_64),
> every time this happens it's a chance for power savings lost.
> 
> HOW YOU CAN HELP
> ----------------
> 
> We'd like to get as many reports of misbehaving apps as possible.
> 
> 1) Install the 'powertop' package
> 
> 2) Run it in a terminal window on a reasonably idle system with your
>    normal combination of apps. (If you run it when you're actively
>    compiling a kernel, watching a movie, or doing other CPU-intensive
>    things, the results aren't as useful.)
> 
> 3) Note the results. If you'd like to capture them for safe-keeping
>    later, you can use the (Fedora-specific) '-d' option to dump them
>    to stdout, rather than pasting from the running app.
> 
> 4) Report the results. You can add reports here, on #fedora-devel,
>    or to the upstream powertop community at power at bughost.org or
>    #powertop on irc.oftc.net.
>    
>    *** Please use a service such as http://pastebin.ca/ rather than
>    pasting powertop reports directly to an IRC channel. ***
>    
>    If you've got a specific app you know is misbehaving, please
>    file a bug with the details, and set it to block the 'wakeup'
>    bug in Fedora bugzilla. (bug number 204948.)
> 
> Thanks for your assistance and help.
> 
> Bill
>