CP102 Lecture Notes - Lecture 5: Computer Hardware, Power Density, Application Software
Document Summary
Chapter 5: system sotware the os, uility programs and file. Make the incredible advance in the underlying hardware available to a rapid evolving body of applicaions: processing, communicaions, storage, interacion. Computer-system operaion: one or more cpus, device controllers connect through common bus providing access to shared memory, concurrent execuion of cpus and devices compeing for memory cycles. The world is a large distributed system: microprocessors in everything, vast infrastructure behind them. Not only pcs connected to the internet: smartphone shipments exceed pc shipments, 4 billion phones in the world smartphone has taken over for the next decade. Technology trends: moore"s law: predicted that the transistor density of semiconductor chips would double roughly every 18 months, microprocessors have become smaller, denser, and more powerful. People-to-computer raio over time: today, there are muliple cpus per person. Power density: potenial power density reaching amazing levels, on the lip side, batery life is very important.
