RHEL8: no_balance_cores in tuned cpu-partitioning profile may not work

Solution In Progress - Updated -


The following options are set in activated cpu-partitioning tuned profile:


If a multi-threaded task or a task with a lot of subtasks is executed in the system like this:

taskset -c <isolated_CPUs_list> ./task


taskset -c <all_CPUs> ./task

then all threads or childs (including the main process) are able to migrate within allowed CPUs affinity despite manual for tuned-profiles-cpu-partitioning says:

              List of CPUs not be considered by the kernel when doing system wide process load-balancing. Usually, this list
              should  be the same as isolated_cores=. This option is optional.


  • Red Hat Enterprise Linux 8
  • tuned cpu-partitioning profile is used

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