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Asked: 2026-06-13T11:41:59+00:00

I’m playing around with linux scheduling with sched.h and bump into some questions. From

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I’m playing around with linux scheduling with sched.h and bump into some questions.

From what I know, Linux scheduler do not treat threads and processes differently when scheduling. Threads are just like process which shares common resources.

Ok, Say I have Process-A and it is set to CPU core 0 and SCHED_FIFO property is set; which will runs until another higher priority tasks kicks in. If Process-A creates a new thread, will the thread inherit the same property? (i.e. be bind to CPU 0 with SCHED_FIFO properties or will it be DEFAULT?)

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  1. Editorial Team

    You can actually test this with a simple program, but from various man pages:

    sched_setaffinity:

    A child created via fork(2) inherits its parent’s CPU affinity mask.
    The affinity mask is preserved across an execve(2).

    pthread_create:

    The new thread inherits copies of the calling thread’s capability sets
    (see
    capabilities(7)) and CPU affinity mask (see sched_setaffinity(2)).

    sched_setscheduler:

    Child processes inherit the scheduling policy and parameters across a
    fork(2).
    The scheduling policy and parameters are preserved across execve(2).

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