What does it mean for memory in a multiprocessor to be uniform? What is the alternative? 9. Explain the coherence problem for multicore and multiprocessor caches. What is a vector machine? Where does...

What does it mean for memory in a multiprocessor to be uniform? What is the alternative? 9. Explain the coherence problem for multicore and multiprocessor caches. What is a vector machine? Where does vector technology appear in modern systems? Explain the differences among coroutines, threads, lightweight processes, and heavyweight processes.