An OS supports both user$-$level threads and

kernel$-$level threads. Do you agree with the following recommendations about when to use

user$-$level threads and when kernel$-$level threads?

Why, or why not?

a$.$ If a candidate for a thread is a CPU$-$bound

computation, make it a kernel$-$level thread

if the system contains multiple processors;

otherwise, make it a user$-$level thread.

b$.$ If a candidate for a thread is an I$/$O$-$bound

computation, make it a user$-$level thread if

the process containing it does not contain

a kernel$-$level thread; otherwise, make it a

kernel$-$level thread.