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OS - Introduction to Systems

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  • 1. Introduction to GeneralComputer Systems (Memory) Organized By: Vinay Arora Assistant Professor CSED, TU Vinay Arora CSED,TU
  • 2. Disclaimer This is NOT A COPYRIGHT MATERIAL Content has been taken mainly from the following books: Operating Systems Concepts By Silberschatz & Galvin,Operating Systems: Internals and Design Principles By William Stallings www.os-book.com www.cs.jhu.edu/~yairamir/cs418/os2/sld001.htm www.personal.kent.edu/~rmuhamma/OpSystems/os.html http://msdn.microsoft.com/en-us/library/ms685096(VS.85).aspxhttp://www.computer.howsttuffworks.com/operating-system6.htm http://williamstallings.com/OS/Animations.html Etc… Vinay Arora CSED,TU
  • 3. Computer Memory Computer Memory refers to the physical devices used to store data or programs (sequences of instructions) on a temporary or permanent basis for use in an electronic digital computer. Computer Data Storage, often called Storage or Memory, refers to computer components and recording media that retain digital data used for computing for some interval of time. The term Memory identifies data storage that comes in the form of chips. The word Storage is used for memory that exists on tapes or disks. Vinay Arora CSED,TU
  • 4. Computer Memory Hierarchy Vinay Arora CSED,TU
  • 5. Data Flow – Disk to CPU Vinay Arora CSED,TU
  • 6. Data Flowing b/w CPU & RAM Vinay Arora CSED,TU
  • 7. Real Life/Time Example Real Life/Time Example – Librarian while issuing a particular requested BOOK using BACKPACK and SHELF Vinay Arora CSED,TU
  • 8. Real Life/Time Example Real Life/Time Example – Librarian while issuing a particular requested BOOK using BACKPACK and SHELF Vinay Arora CSED,TU
  • 9. L1 & L2 Cache Vinay Arora CSED,TU
  • 10. L1 & L2 Cache Vinay Arora CSED,TU
  • 11. L1 & L2 Cache Vinay Arora CSED,TU
  • 12. L1, L2, Main Memory ,Hard Disk L1 Cache - Memory accesses at full microprocessor speed (around 10 nanoseconds, 4 kilobytes to 16 kilobytes in size) L2 Cache - Memory access of type SRAM (around 20 to 30 nanoseconds, 128 kilobytes to 512 kilobytes in size) Main Memory - Memory access of type RAM (around 60 nanoseconds, 32 megabytes to 128 megabytes in size) Hard Disk - Mechanical, slow (around 12 milliseconds, 1 gigabyte to 10 gigabytes in size) Vinay Arora CSED,TU
  • 13. Motherboard Vinay Arora CSED,TU
  • 14. RAM Vinay Arora CSED,TU
  • 15. Thnx… Vinay Arora CSED,TU