$6\mathrm{.}2$ Assume that a system has multiple processing cores. For each of the following scenarios, describe

which is a better locking mechanism$-$a spinlock or a mutex lock where waiting processes sleep while

waiting for the lock to become available: $(5$ points$)$

The lock is to beheld for a short duration.

The lock is to beheld for along duratiol.

A thread may be put to sleep while holding the lock.