Carsten Haitzler (The Rasterman) wrote: > On Tue, 19 Jun 2007 21:23:33 +0000 (UTC) Alec <[EMAIL PROTECTED]> > babbled: > > >>>> I've been using powertop to reduce the number of wakeups on my laptop, >>>> and currently enlightenment is top of the list at around 4 per second. >>>> >>> AFIAK there aren't any patches floating around, but you can change polling >>> intevals for modules and tweak the configs, closing all the windows etc. >>> >> Yup, I only have the pager module enabled, no activity and no windows aside >> from the powertop xterm. >> >> >>> I think the 3rd party net/wlan modules caused a lot more wakes than just >>> 4... I'm not sure how low you can go, since I can't see less than 61 wakes >>> from the radeon driver, but with e17 idle in xorg, I get 99% of the time >>> in C3. >>> >> True, the ipw2100 and the usb mouse cause ~4/sec each and prevent the kernel >> from reaching C3. With both of these gone and NoDRI for the radeon driver, I >> can get the kernel into C3 state most of the time with ~6-8 wakeups/sec. Of >> this, e17 is 4/sec, hence it would be nice to find the culprit and (if >> possible) remove it. >> > > if the mouse causes 4 interrupts/sec - this probably cause mouse events? thus > x > wakeups and then e wakeups to get the events. > > those 4 could be: > > 1. something polling - what, i don't know, but you will need to strace and/or > debug and find out. as already pointed out some modules like to poll - but > most > of them its in the 1 per second or multiple seconds between polls (except > cpufreq. > 2. it could be the result of an x client changing a property etc etc. like a > titlebar etc. see #1 - need to debug. > 3. every 10 secs e pings x clients to see if they are alive if they say they > do > the netwm ping protocol, but if you have enough windows these pings won't > happen at the same time so they will be spread out based on when the window > came up. > > Would it make sense to just have e ping all windows at the same time. This would mean that a new window might not get pinged for almost 20s, but is that so bad. I think as soon as one has a large amount of windows open (which I have all the time, hell why not use all those virtual desktops :)) this method would be better even if the polling was reduced to 5s. I don't know how feasible this is and I know you have a lot more important things on your plate it's just an idea. > i share your desire to reduce this, though 4/sec is really minimal when you > think about it :) > > I agree. Sony disables the hpet timer in bios and don't put an option in to enable it. I have ~ 100 wakeups/s just caused by the kernel because of this. <rant> The Sony bios really sucks. They have a bloody option to enable/disable a bios splash screen, but both hpet and virualization support are disabled and no way of enabling them. This is on an vaio sz, so their business line laptops. </rant>
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