taskset:tldr:bfcef

The command "taskset --cpu-list ${cpu_id_1}-${cpu_id_4}" is used to specify the CPU affinity for a task or a group of tasks in Linux.

Here's a breakdown of the command:

• "taskset" is the command used to manage CPU affinity.
• "--cpu-list" is an option used to specify a list of CPUs or ranges of CPUs.
• "${cpu_id_1}-${cpu_id_4}" refers to the range of CPU IDs you want to assign to the task(s). The variables ${cpu_id_1} and ${cpu_id_4} represent the starting and ending CPU IDs, respectively.

For example, if you have four CPUs with IDs 0, 1, 2, and 3, and you want to assign tasks to CPUs 1 to 4, you can use the command "taskset --cpu-list 1-4". This sets the CPU affinity for the tasks, meaning they will only run on the specified CPUs.

This command is typically used when you want to control which CPUs are utilized by specific tasks or processes, which can be useful in maintaining performance, isolating workloads, or optimizing resource allocation.