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10% Instant Discount up to INR 750 on Axis Bank Debit Card Non-EMI Trxn.Chapter on Software Tools, Assembler, Interprocess Communication, File Sytsems and Protection and Security are substantially rewritten. Sections on hashing function,garbage collection, codee optimisation, relocation and linking concepts, deadlock handling algorithms, system states adn many others have been elaborated upon and rewritten to enhance understanding. The section on threads has been rewritten Discussion of working set allocator is revised completely-elaborations are added to the examples on working set allocator. Table Of Contents: Chapter 1 Language Processors Chapter 2 Data Structures for Language Processing Chapter 3 Scanning and Parsing Chapter 4 Assemblers Chapter 5 Macros and Macro Processors Chapter 6 Compilers and Interpreters Chapter 7 Linkers Chapter 8 Software Tools Chapter 9 Evolution of OS Functions Chapter 10 Processes Chapter 11 Scheduling Chapter 12 Deadlocks Chapter 13 Process Synchronisation Chapter 14 Interprocess Communication Chapter 15 Memory Management Chapter 16 IO Organization and IO Programming Chapter 17 File Systems Chapter 18 Protection and Security Chapter 19 Distributed Operating SystemsIndex Special Features: Added a section on resource allocation and user interface functions. Numerous improvements in the presentation of concepts have been effected throughout errors adn ambiguities have been corrected.
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The metrics demonstrate that substantial reductions in code space and more modest improvements in execution speed can be obtained using these techniques.Extensively rewritten to enhance readability and cohesion. Finally, metrics on the improvements obtained across architectures and across the optimization techniques are provided along with proposed lines of further research. I demonstrate the portability of the Machine Code Optimizer to the Motorola MC68000 and the Digital VAX-11 instruction sets. This optimizer operates in a production environment and incorporates a machine-independent architecture representation that allows it to be ported across a large class of machines. I then describe the implementation of a Machine Code Optimizer containing the code elimination, code distribution, and operand reduction algorithms. I show that the problem of finding optimal solutions for code distribution to be NP-Complete and discuss heuristics for practical solutions. The specific details of certain algorithms are then described: code elimination to remove unreachable code, code distribution to re-order sections of code, operand reduction to convert operands to use more advantageous addressing modes available on the target architecture, and macro compression to collapse common sequences of instructions. I then describe a Machine Code Optimizer that improves code in executable task files in that environment. I begin by demonstrating the need for optimizations at this level in the UNIX programming environment. I describe the details of the implementation which allows these techniques to be re-targeted easily and report on improvements gained when optimizing production software. In addition to a theoretical treatment of this class of optimization techniques, this dissertation reports on an implementation of these techniques in a production environment. I concentrate on techniques which, for various reasons, cannot be applied earlier in the compilation process. This dissertation explores classes of compiler optimization techniques that are applicable late in the compilation process, after all executable code for a program has been linked.
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