Unit OS5: Windows Memory Management

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26Virtual Address Space (V.A.S.)System space contains:Executive, kernel, and HALStatically-allocated systemwidedata cellsPage tables (remapped foreach process)Executive heaps (pools)Kernel-mode device drivers(in nonpaged pool)File system cacheA kernel-mode stack forevery thread in everyprocessUseraccessibleKernel-modeaccessible}Unique perprocess000000007FFFFFFF}Systemwide80000000FFFFFFFF
27<strong>Windows</strong> User ProcessAddress Space LayoutRange Size Function0x0 – 0xFFFF 64 KB No-access region to catch incorrect pointer ref.0x10000 -07FFEFFFF2 GB minus atleast 192kbThe private process address space0x7FFDE000 -0x7FFDEFFF0x7FFDF000 -0x7FFDFFFF0x7FFE0000 -0x7FFE0FFF0x7FFE1000 –0x7FFEFFFF0x7FFF0000 –0x7FFFFFFF4 KB Thread Environment Block (TEB) for first thread, more TEBsare created at the page prior to that page4 KB Process Environment Block (PEB)4 KB Shared user data page – read-only, mapped to system space,contains system time, clock tick count, version number(avoid kernel-mode transition)60 KB No-access region64 KB No-access region to prevent threads from passing buffersthat straddle user/system space boundary
Page 1 and 2: Windows Memory Management (I)Memory
Page 3 and 4: 3IntroductionMain Tasks:Translating
Page 5 and 6: 5Main ComponentsSystem services for
Page 7 and 8: 7Large PagesArchitecture Small Page
Page 9 and 10: 9Large PagesDisadvantage of large p
Page 11 and 12: 11Reserving & Committing MemoryOpti
Page 13 and 14: 13Shared MemoryLike most modern OS
Page 15 and 16: 15Viewing DLLs & Memory MappedFiles
Page 17 and 18: 17Controlling DEPBCD nx values:OptI
Page 19 and 20: 19DEP on 32-bit WindowsHardware DEP
Page 21 and 22: 21Copy-On-Write PagesUsed for shari
Page 23 and 24: 23How Copy-On-Write WorksAfterOrig.
Page 25: 25Virtual Address Space (V.A.S.)Pro
Page 29 and 30: 29Large Address Space AwareImagesIm
Page 31 and 32: 31Address Windowing Extensions32-bi
Page 33 and 34: 33Working Set ManagementDefault wor
Page 35 and 36: 35Look-Aside ListsAnother fast memo
Page 37 and 38: Heap Manager StructureTwo layers:Co
Page 39 and 40: Physical Memory Limits32-Bit 64-Bit
Page 41 and 42: 41Cache SupportSystem wide cache me
Page 43 and 44: 43Windows API MemoryManagement Arch
Page 45 and 46: 45Source Code ReferencesWindows Res
Page 47: ContentView DLLs using “listdll.e

Unit OS5: Windows Memory Management

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