Messages in this thread | | | From | Maciej Rutecki <> | Subject | Re: [REGRESSION] sudden cpu hogging in kernel 3.2 rc-series | Date | Mon, 21 Nov 2011 22:11:17 +0100 |
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On piątek, 18 listopada 2011 o 21:33:15 Nicolas Kalkhof wrote: > Hello, > > since the merges for kernel 3.2 came in late october, my mobile i7 2620M > sandybridge cpu/gpu seems to run hotter (approx 10 °C) when idling and > after some minutes according to top the cpu load goes up on all cores but > the cpu frequency stays low (800 MHz) as well as the gpu (650MHz) and the > system is responding well. Yet still additional 5-8 watts are continously > drained from the power supply. Something is throttling up :(. Oprofile > shows that the kernel hogs the cpu (see dump below). This happens with > every kernel since the 3.2 merge window closed up to latest linux-next. I > wasn't able to track the bad commit down yet. > > Could someone please confirm the issue? >
I observed similar behaviour, few minutes after boot, when KDE is working plasma-desktop process (sometimes another) uses 20-50% cpu. System and kernel works without any kernel, but cpu usage is greater than in 3.1 (and older).
Hardware: old hp/compaq nx6310
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Regards -- Maciej Rutecki http://www.mrutecki.pl -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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