Improvement And Realization Of Dynamic Memory Management Mechanism

Dynamic memory management is necessary for memory resource management in computer system. The existing dynamic memory management methods are inefficient,and have high cost of time.Based on the development of our own operating system for teaching object,this thesis describes the basic theories,architectures,procedures,concepts,algorithms and technologies about the memory management in an operating system.The thesis recounts the realization of the boundary tag method and the buddy system allocator method,which had been improved. A dynamic memory management method using multilevel bitmap catalogue structure is introduced in the paper. A detailed description of the structure of multilevel bitmap catalogue as well as algorithms using multilevel bitmap catalogue is given. The thesis also describes the implement of a 2-level bitmap catalogue method in detail. Then it compares the performance of the three different methods,and draws a conclusion by the analysis. Subsequently,the thesis describes the particular memory management mode of the kernel buffer,depicts the implement of the mode,and analyzes its performance. Finally,the paper proposes the assumption of the betterment and confirms the way of future works.