>Number:         153674
>Category:       kern
>Synopsis:       i386/XEN idle thread shows wrong percentages
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 04 12:50:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Florian Smeets
>Release:        FreeBSD 9.0-CURRENT
>Organization:
>Environment:
FreeBSD ec2 9.0-CURRENT FreeBSD 9.0-CURRENT #111: Sat Jan  1 09:45:23 UTC 2011  
   [email protected]:/usr/obj/i386.i386/usr/src/sys/XEN  i386

>Description:
>From time to time the idle thread does not seem to get accounted correctly, it 
>goes through the roof and then comes down slowly, but only in top's process 
>list. The header seems correct.

CPU:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

  PID USERNAME  THR PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND


   11 root        1 171 ki31     0K     8K RUN     19.1H 24566.89% idle
   12 root       11 -64    -     0K    88K WAIT     1:28  2.00% intr
>How-To-Repeat:
I've seen this on an EC2 instance running ami-5b82b72f. This seems to happen 
when the instance has been idle for a while and suddenly has do to some work.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:
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