chcpu 命令

常用示例

说明

chcpu 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). CPUs are specified by their logical IDs using a comma-separated cpu-list that can contain individual addresses or ranges (e.g., `0,5,7,9-11`).

参数

-c, --configure _cpu-list_

Configure the specified CPUs. 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. The kernel sets them offline.

-e, --enable _cpu-list_

Enable the specified CPUs. The kernel sets them online. A CPU must be configured before it can be enabled.

-g, --deconfigure _cpu-list_

Deconfigure the specified CPUs. The hypervisor removes the CPU from the virtual hardware and returns it to the CPU pool.

-p, --dispatch _mode_

Set the CPU dispatching mode (polarization). Supported modes are `horizontal` (workload spread across all CPUs) and `vertical` (workload concentrated on few CPUs). Only effective if the hardware architecture and hypervisor support CPU polarization.

-r, --rescan

Trigger a rescan of CPUs. After a rescan, the Linux kernel recognizes new CPUs.

-h, --help

Display help text and exit.

-V, --version

Print version information and exit.