root ~ # acpitool -c CPU type : Genuine Intel(R) CPU U2300 @ 1.20GHz CPU speed : 1200.161 MHz Cache size : 1024 KB Bogomips : 2401.33 Bogomips : 2401.10 # of CPU's found : 2 Processor ID : 0 Bus mastering control : yes Power management : yes Throttling control : yes Limit interface : yes Active C-state : C0 C-states (incl. C0) : 2 Usage of state C1 : 4759885 (87.3 %) T-state count : 8 Active T-state : T0 Processor ID : 1 Bus mastering control : yes Power management : yes Throttling control : yes Limit interface : yes Active C-state : C0 C-states (incl. C0) : 2 Usage of state C1 : 4294840 (86.6 %) T-state count : 8 Active T-state : T0 On Mon, Feb 22, 2010 at 10:04 AM, Stefano Z. <mie.iscrizioni@xxxxxxxxx> wrote: > no, my dual celeron su2300 dosen't support speedstep, it stay fixed to 1.2ghz > but i have found the problem, i think this problem have to do with KMS... > I have istalled kernel26 2.6.31.6-1 and the problem disappered but obviously > this is not the solution i want ;-) > If i install 2.6.32+ kernel the problem reappear. > Another thing that happens is that the cpu(s) Temperature with kernels >>2.6.31 stay > about on 53+C while with kernel <2.6.32 stays on 42C... > > > > On Mon, Feb 22, 2010 at 9:43 AM, Andrea Fagiani <andfagiani@xxxxxxxxx> wrote: >> On 02/22/2010 04:53 AM, Brendan Long wrote: >>> >>> 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. >>> >>> >> >> Be sure to have cpu-freq-utils installed, as well as loading the right >> modules (acpi-cpufreq, cpufreq_ondemand, if you plan on using the same >> governor as ubuntu does), and add `cpufreq` to your DAEMONS array in >> rc.conf. >> On my system, with laptop-mode-tools the powertop output is very similar to >> what Brendan said. Also, the 31k+ wakeups definitely mean there's some issue >> on your config. >> >
