The chrt command allows you to set or manipulate the real-time attributes of a Linux process. Real-time attributes refer to the scheduling priority and CPU affinity of a process, which can affect the amount of CPU time and resources that a process receives.
To set the real-time attributes of a process, you can use the chrt command with the -f option followed by the desired priority level and the process ID. For example:
chrt -f 99 1234
This will set the real-time priority of the process with ID 1234 to 99, which is the highest possible priority level.
To set the CPU affinity of a process, you can use the chrt command with the -a option followed by the desired CPU mask and the process ID. For example:
chrt -a 0x3 1234
This will set the CPU affinity of the process with ID 1234 to CPUs 0 and 1, as specified by the 0x3 CPU mask.
It's important to note that you may need to have root privileges to use the chrt command to set the real-time attributes of a process.
For more information about using the chrt command, you can refer to the chrt manual page or use the --help option. For example:
man chrt
chrt --help
It's also important to note that you should use caution when setting the real-time attributes of a process, as it can affect the performance and behavior of your system.