操作系统课件Introduction.ppt

Operating System CITS, NanKai University * SANGUO KILL Android: Google Motorola Winphone: Microsoft Nokia IOS: Apple Operating System CITS, NanKai University * History of OS in CHINA mid-1960s ~ 1970s YangfuQing 150 System (1MIPS) It was used in oil prospection Mid-1970s DJS200/XT2: developed with high-level programming language 1978, GX73 Multi-CPU real-time OS 1983, series of YHOS Unix/Linux: COSIX, Hopen, Delta OS, Smart EOS,中软Linux, 红旗Linux, 东方Linux Operating System CITS, NanKai University * The culture of OS and Computing Powerful, Efficient and Convenient The world is created by “lazy” guys (lazybones) Recycling of concepts and ideas Do you like this digital world? Do you dread this digital world? Operating System CITS, NanKai University * Thanks for your time!Questions Answers Operating System CITS, NanKai University * Processing steps of OS Human-Computer Interaction Input the content of the program (keyboard) Command IDE to compile the program (mouse) Output the exe file to disk (file system) Question 1: How can computer know your input? Question 2: How can IDE compile and generate exe files? Exe file loading Create a thread to run the program (Thread) Load the Exe file from disk to memory (Memory) Schedule the thread to occupy CPU time (Thread) Question 3: How to allocate memory for a thread? Question 4: How to schedule the thread? Program running Load instruction from memory to CPU register (Thread) Execute the first instruction of the program Question 5: The mechanism of instruction execution Operating System CITS, NanKai University * Processing steps of OS (cont.) Interaction between Graphic card and CPU Load graphic card driver (I/O device) Set the content to be displayed (BUS DMA) Question 6: The working mode of driver and BUSDMA Print the string on monitor Convert the string to be pixel-matrix (I/O device) Start printing…. Question 7:The working mode of monitor Exiting steps Block the graphic driver thread, it will wait for next calling Rele