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taskset — Get or set a process' CPU affinity or start a new process with a defined CPU affinity. More informat

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandaffinityprocessclicpusetgettaskset

linux

Problem

How to use the taskset command: Get or set a process' CPU affinity or start a new process with a defined CPU affinity. More information: <https://manned.org/taskset>.

Solution

taskset — Get or set a process' CPU affinity or start a new process with a defined CPU affinity. More information: <https://manned.org/taskset>.

Get a running process' CPU affinity by PID:

taskset {{[-p|--pid]}} {{[-c|--cpu-list]}} {{pid}}

Set a running process' CPU affinity by PID:

taskset {{[-p|--pid]}} {{[-c|--cpu-list]}} {{cpu_id}} {{pid}}

Start a new process with affinity for a single CPU:

taskset {{[-c|--cpu-list]}} {{cpu_id}} {{command}}

Start a new process with affinity for multiple non-sequential CPUs:

taskset {{[-c|--cpu-list]}} {{cpu_id_1,cpu_id_2,cpu_id_3,...}}

Start a new process with affinity for CPUs 1 through 4:

taskset {{[-c|--cpu-list]}} {{cpu_id_1}}-{{cpu_id_4}}

Code Snippets

Get a running process' CPU affinity by PID

taskset {{[-p|--pid]}} {{[-c|--cpu-list]}} {{pid}}

Set a running process' CPU affinity by PID

taskset {{[-p|--pid]}} {{[-c|--cpu-list]}} {{cpu_id}} {{pid}}

Start a new process with affinity for a single CPU

taskset {{[-c|--cpu-list]}} {{cpu_id}} {{command}}

Start a new process with affinity for multiple non-sequential CPUs

taskset {{[-c|--cpu-list]}} {{cpu_id_1,cpu_id_2,cpu_id_3,...}}

Start a new process with affinity for CPUs 1 through 4

taskset {{[-c|--cpu-list]}} {{cpu_id_1}}-{{cpu_id_4}}

Context

tldr-pages: linux/taskset

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