Multithreading in Uniprocessor [closed]

Question

I wish to know how multi-threading in a uniprocessor system is helpful my doubt is when you create the thread it is going to take the execution time slice from the main thread only and other thing is scheduling of threads (context switch between the threads) will also takes considerable amount of time (preemptive kernel) and at a time processor is going to execute only one thread.

Answer 1

Many processes have their speed bound by the slow speed of I/O devices such as disks. Using multiple threads, you can do useful work even while waiting for a slow disk access to complete. Of course, if your process is not I/O bound, then multi-threading on a single processor can cause slow-downs, rather than speed-ups - it's a question of horses for courses.