Re: Power consumption HZ250 vs. HZ1000

From: Pavel Machek
Date: Mon Jul 25 2005 - 10:56:50 EST


> I did some measurements in order to compare power drain with HZ250 and
> HZ1000.
> To measure the actual drain, I used the "smart" battery's internal measurement.
> (Available with acpi-sbs in /proc/acpi/sbs/SBS0/SB0/state.)
> No clue how accurate this is.
> Here some battery details, in case someone knows:
> charge reporting error: 25%
> SB specification: v1.1 (with PEC)
> manufacturer name: Panasonic
> manufacture date: 2004-11-27
> device name: 02ZL
> device chemistry: Lion
> Kernel: 2.6.13-rc3-mm1 + acpi-sbs
> CPU:
> cpu family : 6
> model : 13
> model name : Intel(R) Pentium(R) M processor 1.60GHz
> stepping : 6
> The "ondemand" governor was running, using acpi_cpufreq. (Idle at 600MHz).
> Systems was running X11/KDE to get a more or less realistic scenario. No
> cron jobs, network traffic or additional applications. WLAN and built-in
> display were disabled completely, all fans and LEDs were off, internal hard
> disc was running. Additional peripherals: external keyboard, mouse, display
> and externally-powered hard disk (USB).

USB devices prevent entering C3 and any interesting powersaving,
try without USB...
64 bytes from icmp_seq=28 ttl=51 time=448769.1 ms

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