Essay on Cis Memory Management - 1577 Words

CIS:328 Abstract The purpose of this paper is to show how memory is used in executing programs and its critical support for applications. C++ is a general purpose programming language that runs programs using memory management. Two operating system environments are commonly used in compiling, building and executing C++ applications. These are the windows and UNIX / Linux (or some UNIX / Linux derivative) operating system. In this paper we will explore the implementation of memory management, processes and threads. Memory Management What is a Memory Model? A memory model allows a compiler to perform many important optimizations. Even simple compiler optimizations like loop fusion move statements in the program can influence the†¦show more content†¦Other functions need to be used to segment the virtual memory pages into useful segments. Since virtual memory is allocated by pages, a number of special paging features can be used on virtual memory that cannot be used on other types of memory. For instance, pages can be locked (to prevent read/write access), or they can be protected from any particular access mode (read, write, execute). Heap memory and allocating a memory block Each program is provided with a default process heap, but a process may optionally allocate any number of additional heaps, if more storage is needed. The heap functions will manage their virtual memory usage automatically, and therefore heaps can be set to grow if they are being filled up with data. If a heap is allowed to grow automatically, the heap functions will automatically allocate additional pages as needed. On the x86 architecture the heap grows in size towards higher memory addresses. To use heap memory, a heap must first be allocated (or a handle must be obtained to the default heap). Once you have obtained a handle to a heap, you can pass that handle to the memory allocation functions, to allocate memory from that particular heap. Managing process specific memory The cpu executes a large number of programs while its main concern is the excution of uer programs, the cpu is also needed for other system activities. These activities arecalled processs. A process is a program in execution. Typically a batch job is a process.Show MoreRelatedIndividual Success and Importance of EI and CI1587 Words   |  7 Pagesare number of notations and abbreviations used for both such as CI, IQ, EI and EQ. This essay will use the abbreviations of EI and CI for emotional intelligence and cognitive intelligence respectively. Kreitner and Kinicki (2013) refer to EI as the ability to manage oneself and social relationships in mature and constructive ways. 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