Messages in this thread | | | Date | Wed, 8 May 2013 16:56:33 -0400 | From | Dave Jones <> | Subject | Re: rcu_preempt running flat out on idle desktop. |
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On Wed, May 08, 2013 at 01:52:58PM -0700, Paul E. McKenney wrote: > On Wed, May 08, 2013 at 04:30:42PM -0400, Dave Jones wrote:
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 10 root 20 0 0 0 0 S 200.0 0.0 185301:36 rcu_preempt > > 553 root 20 0 268m 76m 6764 S 200.0 2.6 144579:53 Xorg > > 1199 root 20 0 0 0 0 S 200.0 0.0 306:17.85 kworker/1:0 > > 501 root 20 0 0 0 0 S 200.0 0.0 4471:03 kworker/0:2 > > 12 root 20 0 0 0 0 S 200.0 0.0 67277:16 rcuop/1 > > 1237 davej 20 0 535m 15m 8484 S 200.0 0.5 3645:16 Terminal > > 859 davej 20 0 117m 3036 1336 S 200.0 0.1 1986:55 htop > > > > There are a lot of processes allegedly using "200%" of CPU time, a handful > > in the "196%" range, and then a bunch at 0. > > Yow!!! 185301 minutes is 128 days, which is a truly impressive amount of > CPU time to accumulate in a few short hours.
perf top doesn't show anything out of the ordinary. Just as an idle desktop should behave, it's spending a bunch of time in delay_tsc.
> This is 3.9, or Linus's current tree? I am guessing the latter, but > figured I should ask.
Yeah, the latter. (v3.9-11572-g5af43c2)
Dave
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