The ksoftirqd process keeps utilising a lot of system CPU time

Solution Verified - Updated -


  • 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


  • Red Hat Enterprise Linux 6.3

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content