The chcpu command is a utility in Linux that is used to change the CPU affinity of a process. CPU affinity is a way to specify which CPU or CPUs a process should be allowed to run on. By setting the CPU affinity of a process, you can control how the process is scheduled on the CPU, which can be useful for optimizing performance or avoiding CPU contention.
To use the chcpu command, you will need to specify the process ID of the process that you want to change the CPU affinity of, and the CPU or CPUs that you want the process to be allowed to run on.
To set the CPU affinity of a process to a specific CPU, use the -p option followed by the process ID and the CPU number:
# chcpu -p 12345 0
This will set the CPU affinity of the process with ID 12345 to CPU 0.
If you encounter the below error while running the command chcpu:
chcpu: command not found
you may try installing the below package as per your choice of distribution:
| Distribution | Command |
|---|---|
| Debian | apt-get install util-linux |
| Ubuntu | apt-get install util-linux |
| Alpine | apk add util-linux |
| Arch Linux | pacman -S util-linux |
| Kali Linux | apt-get install util-linux |
| CentOS | yum install util-linux |
| Fedora | dnf install util-linux |
| OS X | brew install util-linux |
| Raspbian | apt-get install util-linux |
deepika Command Examples
1.Disable CPUs via a list of CPU ID numbers:
chcpu -d 1,3
2.Enable a set of CPUs via a range of CPU ID numbers:
chcpu -e 1-10