CONFIG_RCU_NOCB_CPU_ALL: All CPUs are build_forced no-CBs CPUs

General informations

The Linux kernel configuration item CONFIG_RCU_NOCB_CPU_ALL:

• prompt: All CPUs are build_forced no-CBs CPUs
• type: bool
• depends on: (none)
• defined in init/Kconfig
• found in Linux kernels: 3.10–3.19, 4.0–4.12

Help text

This option forces all CPUs to be no-CBs CPUs. The rcu_nocbs= boot parameter will be ignored. All CPUs' RCU callbacks will be executed in the context of per-CPU rcuo kthreads created for this purpose. Assuming that the kthreads whose names start with "rcuo" are bound to "housekeeping" CPUs, this reduces OS jitter on the remaining CPUs, but might decrease memory locality during RCU-callback invocation, thus potentially degrading throughput.

Select this if all CPUs need to be no-CBs CPUs for real-time or energy-efficiency reasons.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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