Memory management pdf
[PDF File]Memory Management in the Java HotSpot Virtual Machine
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Memory management is the process of recognizing when allocated objects are no longer needed, deallocating (freeing) the memory used by such objects, and making it available for subsequent allocations. In some programming languages, memory management is the programmer’s responsibility. The complexity of that task
[PDF File]Memory Management - University of California, Davis
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Memory Management Raju Pandey Department of Computer Sciences University of California, Davis Spring 2011. Overview • Goals of memory management: Subdividing memory to accommodate multiple processes Memory needs to be allocated to ensure a reasonable supply of
[PDF File]6.096 Lecture 8: Memory Management - MIT OpenCourseWare
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•Another way to allocate memory, where the memory will remain allocated until you manually de-allocate it •Returns a pointer to the newly allocated memory •Terminology note: –If using int x; the allocation occurs on a region of memory called the stack –If using new int; the allocation occurs on a region of memory called the heap
[PDF File]Memory Management - Princeton University
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Memory Management CS 217 Memory Management • Problem 1: Two programs can’t control all of memory simultaneously • Problem 2: One program shouldn’t be allowed to access/change the memory of another program • Problem 3: Machine may have only 256MB of memory, while virtual address space is 4GB 0 0xffffffff Text Data BSS Stack Heap 0x2000 OS
[PDF File]Operating Systems – Memory Management
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Memory-Management Unit (MMU) • Hardware device that maps logical/virtual to physical address. • In MMU the value in the relocation register is added to every address generated by a program at the time the address is sent to memory. • The program deals with logical addresses; it
[PDF File]Lecture 10: Memory Management
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2 CSE 120 – Lecture 10 Memory Management Next few lectures are going to cover memory management Goals of memory management To provide a convenient abstraction for programming To allocate scarce memory resources among competing processes to maximize performance with minimal overhead
[PDF File]Memory Management Different types of Memory Management
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A virtual memory system consists of software (in the operating system) and memory mapping hardware. The needed hardware may be implemented as a separate IC chip, a memory management unit (MMU). 11 Uses for Memory Mapping Relocation. A MMU makes it possible for all processes in memory to start at the same address. Artificially contiguous addresses.
[PDF File]OPERATING SYSTEMS MEMORY MANAGEMENT - WPI
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8: Memory Management 4 MEMORY MANAGEMENT • The concept of a logical address space that is bound to a separate physical address space is central to proper memory management. • Logical address – generated by the CPU; also referred to as virtual address • Physical address – address seen by the memory unit • Logical and physical addresses are the same in compile-time and load-
[PDF File]Memory Management
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Memory-Management Unit (MMU) • Hardware device – at run time maps virtual to physical address • Many methods possible • Consider simple scheme where the value in the relocation register is added to every address generated by a user process at the time it is sent to memory
[PDF File]Chapter 9: Memory Management
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Operating System Concepts 9.1 Silberschatz, Galvin and Gagne 2002 Chapter 9: Memory Management Background Swapping Contiguous Allocation Paging Segmentation Segmentation with Paging Operating System Concepts 9.2 Silberschatz, Galvin and Gagne 2002 Background Program must be brought into memory and placed within a process for it to be run.
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