On 02/21/2010 04:55 PM, Xavier Chantry wrote: > On Mon, Feb 22, 2010 at 12:42 AM, Stefano Z. <mie.iscrizioni@xxxxxxxxx> wrote: > >> hi >> >> i've bought a new notebook (hp pavilion dm1-1150sl) and installed >> archlinux. >> i have see a strange thing with powertop, i'm running the vanilla arch kernel26, >> and i have see this behaviour: >> Cn Avg residency P-states (frequencies) >> C0 (cpu occupata) (31,6%) >> C0 0,0ms ( 0,0%) >> C1 mwait 0,1ms ( 0,7%) >> C4 mwait 0,0ms (67,8%) >> Wakeups-from-idle per second : 31483,5 interval: 10,0s >> --- >> as you can see, i have a LOT of wakeups per seconds very low c1 states >> lot of c0 and c4 states, >> a wattmeter tell me that archlinux consume about 25/26watt >> Then i have boot a live ubuntu distro and see this: >> Cn permanenza media P-state (frequenze) >> C0 (cpu occupata) ( 0,6%) >> polling 0,0 ms ( 0,0%) >> C1 mwait 26,7 ms (68,6%) >> C4 mwait 1,2 ms (30,8%) >> Wakeup-da-idle al secondo: 281,3 intervallo: 15,0s >> --- >> as you can see the wakeups are a LOT lower than on arch and we have >> lot of c1 and c4 state, >> power consumption is about 20W, the same that i have with win7 (about 18/20w). >> For meaning about cX state see here: >> http://www.lesswatts.org/projects/powertop/powertop.php >> >> thanks! >> >> > You didn't give enough information so we will need to check the basis : > - which cpufreq driver and governor are you using in both cases (check > cpufreq-info) > - what processes does powertop show as causes for wakeups ? > - what processes does top show in term of cpu usage ? > > Here is what I got in the last few minutes when i was writing this : > C4 mwait 3.4ms (92.5%) 800 Mhz 98.0% > Wakeups-from-idle per second : 279.4 interval: 10.0s > > I have a core 2 duo with acpi-cpufreq loaded and conservative governor. > $ grep cpufreq /etc/rc.conf > MODULES=(acpi-cpufreq) > DAEMONS=(syslog-ng net-profiles crond dbus hal alsa cpufreq storage-fixup) > $ grep governor /etc/conf.d/cpufreq > # valid governors: > governor="conservative" > They may just not have cpu-freq-utils installed maybe? I'm using laptop-mode-tools with compiz and GNOME running (but not doing anything) and it's saying 99.2% C4, 0.8% C0. This is with another Core2 and laptop-mode is set to use the powersave governor on battery (which is how I tested). When I plug it in, it jumps up to 25%, but I don't really care how active the processor is when it's on battery.
