What does Taskset do in Linux?

The taskset command is used to set or retrieve the CPU affinity of a running process given its pid, or to launch a new command with a given CPU affinity. CPU affinity is a scheduler property that “bonds” a process to a given set of CPUs on the system.

How do I enable Taskset in Linux?

To start with the “taskset” command, first, we need to know about process affinity. Process affinity is the scheduler property that helps to bind or unbind the process so that the process will run only with the allotted CPU. In Linux-like systems, there are multiple tools to set the affinity of the CPU of a process.

What is Linux Lscpu command?

DESCRIPTION top. lscpu gathers CPU architecture information from sysfs, /proc/cpuinfo and any applicable architecture-specific libraries (e.g. librtas on Powerpc). The command output can be optimized for parsing or for easy readability by humans.

How does Linux handle affinity?

The Linux scheduler will honor the given CPU affinity and the process will not run on any other CPUs. Note that the Linux scheduler also supports natural CPU affinity: the scheduler attempts to keep processes on the same CPU as long as practical for performance reasons.

What is the purpose of the taskset command?

The taskset command is used to set or retrieve the CPU affinity of a running process given its pid, or to launch a new command with a given CPU affinity. CPU affinity is a scheduler property that “bonds” a process to a given set of CPUs on the system.

How to assign CPU core using Taskset command?

CPU affinity of a running process can also be allocated using the mentioned command: $ taskset -cp 0, 2 1825 Using the “ taskset ” command, the user cannot only set the CPU affinity or range, but the user can also assign the CPU core to the process.

How to get CPU affinity from Taskset command?

If you want taskset to display CPU affinity of an already running process, use the command in the following way: Just replace PID with the ID of the process whose CPU affinity you want to fetch. For example: So hexadecimal value ‘f’ here means the process can run on any of the 4 processor cores: 0,1,2,3.

Which is an example of a Taskset return?

For example, When taskset returns, it is guaranteed that the given program has been scheduled to a legal CPU. specifiy a numerical list of processors instead of a bitmask. The list may contain multiple items, separated by comma, and ranges. For example, 0,5,7,9-11. A user must possess CAP_SYS_NICE to change the CPU affinity of a process.