В сообщении от 14 of September 2010 00:19:55 автор Jesse Barnes написал: > On Tue, 14 Sep 2010 00:10:08 +0300 > > Vasily Khoruzhick <anars...@gmail.com> wrote: > > В сообщении от 13 of September 2010 23:44:41 автор Jesse Barnes написал: > > > I remember seeing a similar problem on an Eee PC I had; it seemed to be > > > timer/interrupt related somehow. If I booted with clocksource=tsc > > > (or maybe it was pit) I got nice smooth animations, but if I used the > > > HPET things were really slow. > > > > > > Does the same work for you? > > > > Yeah, it works for me (will use it as temporary workaround). But it > > definitely is not clean solution, as I can't use nohz mode with tsc > > clocksource :) > > Thomas, does this ring any bells for you? > > I think the root symptom of the issue is that we get a much reduced i915 > interrupt frequency (or no interrupts) on some 945GM platforms when > using HPET as our clock source. > > In fact, on the platform I tested, it seemed that the i915 IRQs wouldn't > generate interrupts at all when HPET was used. But shaking the mouse or > generating network traffic was enough to get i915 interrupts coming in, > even though neither of those interrupts were shared with the i915 > device. > > Here's hoping you have some ideas to try... > > Thanks,
Jesse, is it possible to disable wait for vsync somehow? cpufreq is not working for me with nohz=no for some reason, as result cpu temperature and power usage are higher. I prefer to see tearing but with low power usage and without jerky keyboard :) Regards Vasily
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