(PHP 8 >= 8.4.0)
pcntl_getcpuaffinity — Get the cpu affinity of a process
Retrieve the cpu affinity of the pid.
pidnull , the current process ID is used.
Returns the cpu affinity mask of the process, or false on failure.
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.
A ValueError is thrown when
pid is an invalid process id
or the cpu mask had failed to be created.
If pid is a process for which the current
user has no allowed permission, a E_WARNING
is emitted.