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Architecture of the Windows Kernel

Architecture of theWindows KernelBerlinApril 2008 Dave Probert, Kernel ArchitectWindows Core Operating Systems DivisionMicrosoft CorporationMS/HP 2008 Microsoft Corporation 2008 Over-simplified OS historyMulticsUNIX v6/v7 BSD/SVR4 Linux/MacOSRSX-11 VMSNTCP/MMS/DOSWin9xOf all the interesting operating systemsonly UNIX and NT matter (and maybe Symbian)MachTenexAccentSystem38OS/360VM/ 370 SymbianMCPNT vs UNIX Design EnvironmentsEnvironment which influencedfundamental design decisionsWindows (NT)UNIX32-bit program address spaceMbytes of physical memoryVirtual memoryMbytes of disk, removable disksMultiprocessor (4-way)Micro-controller based I/O devicesClient/Server distributed computingLarge, diverse user populations16-bit program address spaceKbytes of physical memorySwapping system with memory mappingKbytes of disk, fixed disksUniprocessorState-machine based I/O devicesStandalone interactive systemsSmall number of friendly usersEffect on OS DesignNT vs UNIXA lthough both Windows and Linux have adapted to changes in theenvironment, the original design environments ( in 1989 and 1973) heavilyinfluenced t

NT kernel philosophy •Reliability, Security, Portability, Compatibility are all paramount •Performance important –Multi-threaded, asynchronous •General facilities that can be re-used –Support kernel-mode extensibility (for better or worse) –Provide unified mechanisms that can be shared –Kernel/executive split provides a clean ...

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