The ksoftirqd process keeps utilising a lot of system CPU time

Solution Verified - Updated -

Issue

  • According to top, the ksoftirqd process consistently generates a high percentage of CPU utilisation
  • The perf report indicates the following:
     42,73%  ksoftirqd/0  [kernel.kallsyms]  [k] find_busiest_group
     14,24%  ksoftirqd/0  [kernel.kallsyms]  [k] local_clock
     14,24%  ksoftirqd/0  [kernel.kallsyms]  [k] find_next_bit
     14,24%  ksoftirqd/0  [kernel.kallsyms]  [k] memcpy
     14,24%  ksoftirqd/0  [kernel.kallsyms]  [k] _spin_lock
      0,28%  ksoftirqd/0  [kernel.kallsyms]  [k] perf_pmu_nop_void
      0,01%  ksoftirqd/0  [kernel.kallsyms]  [k] native_write_msr_safe

Environment

  • Red Hat Enterprise Linux 6.3

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