Java Concurrency in practice
                Chapters: 1,2, 3 & 4
            Bjørn Christian Sebak (bse069@student.uib.no)
                Karianne Berg (karianne@ii.uib.no)
               INF329 – Spring 2007
    Chapter 1 - Introduction
      Brief history of concurrency
      Before OS, a computer executed a 
       single program from start to finnish
      But running a single program at a time 
       is an inefficient use of computer 
       hardware
      Therefore all modern OS run multiple 
       programs (in seperate processes)  
    Brief history of concurrency (2)
       Factors for running multiple processes:
          Resource utilization: While one program 
           waits for I/O, why not let another program 
           run and avoid wasting CPU cycles?
          Fairness: Multiple users/programs might 
           have equal claim of the computers 
           resources. Avoid having single large 
           programs „hog“ the machine.
          Convenience: Often desirable to create 
           smaller programs that perform a single 
           task (and coordinate them), than to have 
           one large program that do ALL the tasks