[Translated from mos] bug-Wrong Kernel Statistic and mosbug-wrong between Oracle Linux 5.9 and Oracle Linux 6.4

[Translated from mos] bug-Wrong Kernel Statistic and mosbug-wrong between Oracle Linux 5.9 and Oracle Linux 6.4
Bug between Oracle Linux 5.9 and Oracle Linux 6.4 -- Wrong Kernel Statistic in Version 2.6.39-400. X. X

Reference:
Wrong Kernel Statistic in Version 2.6.39-400. X. X (Doc ID 1552713.1)

Applicable:
Linux OS-Version Oracle Linux 5.9 with Unbreakable Enterprise Kernel [2.6.39] to Oracle Linux 6.4 with Unbreakable Enterprise Kernel [2.6.39] [Release OL5U9 to OL6U4]
Linux x86-64
Linux x86

Symptoms:
When running continuously, both mpstat and sar will occasionally report 0% for all of the various cpu times, including idle. A single mpstat will
Report odd usage even on a mostly idle machine, for example:


Linux 2.6.39-400.17.2.el6uek.x86 _ 64 (test.oracle.com)
11:14:25 CPU % usr % nice % sys % iowait % irq % soft % steal % guest % idle
11:14:25 all 3.44 0.10 4.38 3.97 0.00 0.06 50.82 0.00 37.23


Change:
The system was upgraded to a UEK kernel with a version later than 2.6.39-400

Cause:
Unpublished BUG 16567925-incorrect cpu utilization stats with 2.6.39-400.17.1

Solution:
Upgrade to kernel 2.6.39-400.22.1 or later.