pcntl_setcpuaffinity

    (PHP 8 >= 8.4.0)

    pcntl_setcpuaffinity — Set the cpu affinity of a process

    Description

    pcntl_setcpuaffinity(?int $pid = null, array $hmask = ?): bool

    Sets the cpu affinity for the pid with the cpu affinity mask given by hmask.

    Parameters

    pid
    If null, the current process ID is used.
    hmask
    The cpu affinity mask comprised of one or more cpu id for binding the process to.

    Return Values

    Returns true on success or false on failure.

    Warning

    This function may return Boolean false, but may also return a non-Boolean value which evaluates to false. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

    Errors/Exceptions

    A TypeError is thrown if one of the cpu id from the hmask is invalid. A ValueError is thrown if pid is an invalid process id or the cpu mask had failed to be created.

    See Also

    • pcntl_setcpuaffinity()

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