Under what circumstances does

When a kernel thread suffers a page fault,another kernel thread can be switched in to use the interleaving time in a useful manner.A single-threaded process,on the other hand,will not be capable of performing useful work when a page fault takes place .Therefore,in scenarios where a program might suffer from frequent page faults or has to wait for other system events,a multi-threaded solution would perform better even on a

single-processor system.