RHEL6 performance issues on system with HPET timer device

Solution Verified - Updated -


The system intermittently exhibits symptoms of 'general slowness' even if the workload is low or the system appears to be idle. For example, delayed responses during ssh sessions. In the extreme case the system can appear to be temporarily frozen. The issue was originally observed on KVM hosts. However, it can occur in other application environments as well.


  • Red Hat Enterprise Linux 6.1
  • x86_64
  • system with HPET timer device
  • Intel(R) Xeon(R) CPU X5570 @ 2.93GHz

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