chcpu can modify the state of CPUs. It can enable or disable CPUs,
scan for new CPUs, change the CPU dispatching mode of the underlying
hypervisor, and request CPUs from the hypervisor (configure) or
return CPUs to the hypervisor (deconfigure).
Some options have a cpu-list argument. Use this argument to specify
a comma-separated list of CPUs. The list can contain individual CPU
addresses or ranges of addresses. For example, 0,5,7,9-11 makes the
command applicable to the CPUs with the addresses 0, 5, 7, 9, 10, and
-c, --configure cpu-list
Configure the specified CPUs. Configuring a CPU means that
the hypervisor takes a CPU from the CPU pool and assigns it to
the virtual hardware on which your kernel runs.
-d, --disable cpu-list
Disable the specified CPUs. Disabling a CPU means that the
kernel sets it offline.
-e, --enable cpu-list
Enable the specified CPUs. Enabling a CPU means that the
kernel sets it online. A CPU must be configured, see -c,
before it can be enabled.
-g, --deconfigure cpu-list
Deconfigure the specified CPUs. Deconfiguring a CPU means
that the hypervisor removes the CPU from the virtual hardware
on which the Linux instance runs and returns it to the CPU
pool. A CPU must be offline, see -d, before it can be
-p, --dispatch mode
Set the CPU dispatching mode (polarization). This option has
an effect only if your hardware architecture and hypervisor
support CPU polarization. Available modes are:
horizontal The workload is spread across all available
vertical The workload is concentrated on few CPUs.
Trigger a rescan of CPUs. After a rescan, the Linux kernel
recognizes the new CPUs. Use this option on systems that do
not automatically detect newly attached CPUs.
Display version information and exit.
Display help text and exit.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
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firstname.lastname@example.org. This page was obtained from the
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2017-03-13. If you discover any rendering problems in this HTML ver‐
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util-linux July 2014 CHCPU(8)