Messages in this thread | | | Date | Wed, 23 May 2012 16:53:59 -0500 | From | Jonathan Nieder <> | Subject | Re: [3.2.16 -> 3.2.17 regression] High reported CPU load when idle |
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Hi Anders,
Anders Boström wrote[1]:
> Starting with 3.2.17-1, the CPU load accounting is broken when the > computer is idle. The CPU load is reported as >0.50 when > idle. 3.2.16-1 don't suffer from this problem. > > Suspected patch is the upstream patch > "sched: Fix nohz load accounting -- again!" > commit 5e2d50da11f0e6ec3ce8fe658d7c83b0b4346c68 to 3.2 and > originating from c308b56b5398779cd3da0f62ab26b0453494c3d4 . > > See also: > > https://bugs.launchpad.net/unity/+bug/991370 > https://lkml.org/lkml/2012/5/22/310 > https://bugzilla.redhat.com/show_bug.cgi?id=822877 > https://bbs.archlinux.org/viewtopic.php?id=141289
Thanks for writing.
If I understand correctly, the load average calculation both before and after that commit is broken, in different ways.
I'm cc-ing Lesław Kopeć, Aman Gupta, and Doug Smythies who worked on the above change[2]. I recommend pulling Thomas Gleixner <tglx@linutronix.de> into the conversation once you have a better idea of what's going on or a new change to recommend. If you'd like to also track this on a bugtracker, http://bugzilla.kernel.org/, product Process Management, component Scheduler might be a good place.
Aside from that, I can't really offer much to help you, but others on linux-kernel might.
Hope that helps, Jonathan
[1] http://bugs.debian.org/674153 [2] http://thread.gmane.org/gmane.linux.kernel/1249223/focus=1262319 [3] http://thread.gmane.org/gmane.linux.kernel/1291870/focus=1292058 -- 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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