Darwin OS
- 1. 1 Darwin OS Prepared By: Patel Nidhi B 131060753016
- 2. 2 AGENDA o o o o OS X Architecture Introduction to Darwin I/O Kit Networking
- 3. 3 OS X Architecture - overview o Layered architecture o Features include Improved reliability & performance Enhance networking Object based system programming interface Support for industry standards
- 4. 4 Cont… o OS manly depend on the Core OS – Kernel OS (Darwin) o Kernel enhancements for MAC OS X o Preemption Multitasking – let scheduling process to share time – supports real time behavior o Memory Protection o Improved Networking Facilities o Support for Macintosh & non-Macintosh File System o Object- Oriented API
- 5. 5 Introduction- DARWIN o Its Unix-derived OS core that provides the underlying foundation for Mac OS X o Forms core set of components for OS x & iOS o Open Source Technology o Same system s/w forms the core – free environment for Developers
- 6. 6 o Darwin mainly based on o BSD o Mach o Apple Technologies o Includes the facilities for o o o o Creating device drivers Improved reliability and performance Virtual File System design Premier networking facility
- 7. 7 Kernel(Darwin) Architecture o Mainly Include environments o o o o Mach kernel BSD I/O Kit File System
- 8. 8 Cont.. o Mach o Manages - Processor Resources (CPU Usage + Memory) Handles Scheduling - Provides Memory Protection - Messaging Center for entire OS o Mach Component Provides Remote Procedure Calls Scheduler support for symmetric multiprocessing (SMP) Real time services support Virtual memory support
- 9. 9 Cont… o BSD o Provides “OS personality” services o Based on BSD Kernel – FreeBSD o BSD Component Provides File System Networking Free BSD Kernel API Kernel Support for Threads Support for syscall
- 10. 10 Cont… o Networking o Enhance the BSD network capability for modern features o Network Address Translation (NAT) & Firewalls o Networking Component provides Support for both IP MultiHoming Routing – multicast support Packet Fltering
- 11. 11 Cont… o File System o Support of many file system like ( HFS, UFS, NFS etc.) o Default File System (HFS+) o File System Provides Enhanced Virtual File System (VFS) – let the file system stackable Increased Performance on previous versions
- 12. 12 Cont… o I/O kit o Framework for Driver development – many Devices o Modular and Extensible o Object oriented i/o architecture – restricted subset of C++ o I/O kit component provides True plug and play Dynamic device management On-demand loading of drivers Multiprocessor capabilities
- 13. 13 Kernel Extension o Gives ability to dynamically load the pieces of Code to Kernel – KEXTs o No need to recompile the Kernel – Monolithic
- 14. 14 Thank you…