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Slide 11-1
Copyright © 2004 Pearson Education, Inc.
Operating Systems: A Modern Perspective, Chapter 11
Slide 11-2
Copyright © 2004 Pearson Education, Inc.
Operating Systems: A Modern Perspective, Chapter 11
11
Memory
Management
Slide 11-3
Copyright © 2004 Pearson Education, Inc.
Operating Systems: A Modern Perspective, Chapter 11
The External View of the Memory Manager
Hardware
Application
Program
File Mgr
Device Mgr
Memory Mgr
Process Mgr
UNIX
File Mgr
Device Mgr
Memory Mgr
Process Mgr
Windows
VMQuery()
VirtualFree()
VirtualLock()
ZeroMemory()
VirtualAlloc()
sbrk()
exec()
getrlimit()
shmalloc()
Slide 11-4
Copyright © 2004 Pearson Education, Inc.
Operating Systems: A Modern Perspective, Chapter 11
Memory Manager
•
Requirements
–
Minimize executable memory access time
–
Maximize executable memory size
–
Executable memory must be cost-effective
•
Today’s memory manager:
–
Allocates primary memory to processes
–
Maps process address space to primary memory
–
Minimizes access time using cost-effective
memory configuration
–
May use static or dynamic techniques
Slide 11-5
Copyright © 2004 Pearson Education, Inc.
Operating Systems: A Modern Perspective, Chapter 11
Storage Hierarchies
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