A lot of rescheduling interrupts on idle isolated CPU core

Solution Verified - Updated -

Issue

In some cases on Red Hat Enterprise Linux 7 system where some CPU cores are isolated and the rest of CPU cores are not isolated there might be a lot of rescheduling interrupts arriving to isolated CPU cores. In most cases on idle system rescheduling interrupts will arrive to first isolated CPU core but may arrive to other isolated CPUs.
There should be at least two non-isolated CPU cores configured to observe such situation.

Environment

  • Red Hat Enterprise Linux 7

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