Role of Operating System

• mémoire
• mémoire - matière potentielle : architecture divides memory into segments
• mémoire - matière potentielle : multiprocessor
• mémoire - matière potentielle : model
• expression écrite
• mémoire - matière potentielle : access system
• mémoire - matière potentielle : references

Nov-20-03 CSE 542: Operating Systems 1 Role of Operating System • Operating systems are designed to provide uniform abstraction across multiple applications: fair sharing of resources • General purpose OS like Solaris in wizard.cse.nd.edu – Mail, web, samba server, telnet, emacs … – Memory fs, afs, ufs … – Fibre channel devices, floppy disks … • What about applications/services such as video games, data base servers, mail servers – OS gets in the way of these applications in the name of fairness (MSDOS is the ideal OS!!)

• uniform abstraction across multiple applications
• multiple man-machine interaction to the sequential processing of absentee-user jobs
• programs access files
• hardware from a virtual address to a real address
• computer industry
• multics
• memory
• system