NAME
chcpu - configure CPUsSYNOPSIS
chcpu -c|-d|-e|-g cpu-listDESCRIPTION
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).OPTIONS
-c, --configure cpu-listConfigure 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.
Disable the specified CPUs. Disabling a CPU
means that the kernel sets it offline.
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.
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 deconfigured.
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
vertical
The workload is spread across all available
CPUs.
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 help text and exit.
Print version and exit.
EXIT STATUS
chcpu has the following exit status values:success
failure
partial success
AUTHORS
Heiko <[email protected]>CarstensCOPYRIGHT
Copyright IBM Corp. 2011SEE ALSO
lscpu(1)REPORTING BUGS
For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.AVAILABILITY
The chcpu command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.2022-05-11 | util-linux 2.38.1 |