Improved Code Optimization Techniques for Embedded Processors PDF Download

Author: Sunil R. Atri
Publisher:
ISBN:
Category :
Languages : en
Pages : 152

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Author: Rainer Leupers
Publisher: Springer Science & Business Media
ISBN: 1475731698
Category : Computers
Languages : en
Pages : 218

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Book Description
The building blocks of today's and future embedded systems are complex intellectual property components, or cores, many of which are programmable processors. Traditionally, these embedded processors mostly have been pro grammed in assembly languages due to efficiency reasons. This implies time consuming programming, extensive debugging, and low code portability. The requirements of short time-to-market and dependability of embedded systems are obviously much better met by using high-level language (e.g. C) compil ers instead of assembly. However, the use of C compilers frequently incurs a code quality overhead as compared to manually written assembly programs. Due to the need for efficient embedded systems, this overhead must be very low in order to make compilers useful in practice. In turn, this requires new compiler techniques that take the specific constraints in embedded system de sign into account. An example are the specialized architectures of recent DSP and multimedia processors, which are not yet sufficiently exploited by existing compilers.

Author: Heiko Falk
Publisher: Springer Science & Business Media
ISBN: 1402028296
Category : Computers
Languages : en
Pages : 234

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Book Description
This book focuses on source-to-source code transformations that remove addressing-related overhead present in most multimedia or signal processing application programs. This approach is complementary to existing compiler technology. What is particularly attractive about the transformation flow pre sented here is that its behavior is nearly independent of the target processor platform and the underlying compiler. Hence, the different source code trans formations developed here lead to impressive performance improvements on most existing processor architecture styles, ranging from RISCs like ARM7 or MIPS over Superscalars like Intel-Pentium, PowerPC, DEC-Alpha, Sun and HP, to VLIW DSPs like TI C6x and Philips TriMedia. The source code did not have to be modified between processors to obtain these results. Apart from the performance improvements, the estimated energy is also significantly reduced for a given application run. These results were not obtained for academic codes but for realistic and rep resentative applications, all selected from the multimedia domain. That shows the industrial relevance and importance of this research. At the same time, the scientific novelty and quality of the contributions have lead to several excellent papers that have been published in internationally renowned conferences like e. g. DATE. This book is hence of interest for academic researchers, both because of the overall description of the methodology and related work context and for the detailed descriptions of the compilation techniques and algorithms.

Author: Manish Verma
Publisher: Springer Science & Business Media
ISBN: 1402058977
Category : Technology & Engineering
Languages : en
Pages : 192

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Book Description
This book proposes novel memory hierarchies and software optimization techniques for the optimal utilization of memory hierarchies. It presents a wide range of optimizations, progressively increasing in the complexity of analysis and of memory hierarchies. The final chapter covers optimization techniques for applications consisting of multiple processes found in most modern embedded devices.

Author: Paul Lokuciejewski
Publisher: Springer Science & Business Media
ISBN: 9048199298
Category : Technology & Engineering
Languages : en
Pages : 268

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Book Description
For real-time systems, the worst-case execution time (WCET) is the key objective to be considered. Traditionally, code for real-time systems is generated without taking this objective into account and the WCET is computed only after code generation. Worst-Case Execution Time Aware Compilation Techniques for Real-Time Systems presents the first comprehensive approach integrating WCET considerations into the code generation process. Based on the proposed reconciliation between a compiler and a timing analyzer, a wide range of novel optimization techniques is provided. Among others, the techniques cover source code and assembly level optimizations, exploit machine learning techniques and address the design of modern systems that have to meet multiple objectives. Using these optimizations, the WCET of real-time applications can be reduced by about 30% to 45% on the average. This opens opportunities for decreasing clock speeds, costs and energy consumption of embedded processors. The proposed techniques can be used for all types real-time systems, including automotive and avionics IT systems.

Author: Max Domeika
Publisher: Newnes
ISBN: 0080558585
Category : Technology & Engineering
Languages : en
Pages : 435

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Book Description
The multicore revolution has reached the deployment stage in embedded systems ranging from small ultramobile devices to large telecommunication servers. The transition from single to multicore processors, motivated by the need to increase performance while conserving power, has placed great responsibility on the shoulders of software engineers. In this new embedded multicore era, the toughest task is the development of code to support more sophisticated systems. This book provides embedded engineers with solid grounding in the skills required to develop software targeting multicore processors. Within the text, the author undertakes an in-depth exploration of performance analysis, and a close-up look at the tools of the trade. Both general multicore design principles and processor-specific optimization techniques are revealed. Detailed coverage of critical issues for multicore employment within embedded systems is provided, including the Threading Development Cycle, with discussions of analysis, design, development, debugging, and performance tuning of threaded applications. Software development techniques engendering optimal mobility and energy efficiency are highlighted through multiple case studies, which provide practical “how-to advice on implementing the latest multicore processors. Finally, future trends are discussed, including terascale, speculative multithreading, transactional memory, interconnects, and the software-specific implications of these looming architectural developments. This is the only book to explain software optimization for embedded multi-core systems Helpful tips, tricks and design secrets from an Intel programming expert, with detailed examples using the popular X86 architecture Covers hot topics, including ultramobile devices, low-power designs, Pthreads vs. OpenMP, and heterogeneous cores

Author: Mike Brogioli
Publisher: Elsevier Inc. Chapters
ISBN: 012807244X
Category : Technology & Engineering
Languages : en
Pages : 42

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Book Description
Optimization metrics for compiled code are not always measured in resulting execution clock cycles on the target architecture. Consider a modern cellular telephone or wireless device which may download executables over a wireless network connection or backhaul infrastructure. In such cases, it is often advantageous for the compiler to reduce the size of the compiled code which must be downloaded to the wireless device. By reducing the size of the code needed to be downloaded, savings are achieved in terms of bandwidth required for each wireless point of download. Optimization metrics such as the memory system performance of compiled code are other metrics which are often important to developers. These are metrics correlated to the dynamic run-time behavior of not only the compiled code on the target processor, but also the underlying memory system, caches, DRAM and buses, etc. By efficiently arranging the data within the application or, more specifically, the order in which data and corresponding data structures are accessed by the application dynamically at run-time, significant performance improvements can be gained at the memory-system level. In addition, vectorizing compilers can also improve performance due to spatial locality of data when SIMD instruction sets are present and varying memory-system alignment conditions are met.

Author: Clifford Liem
Publisher: Springer Science & Business Media
ISBN: 1475764227
Category : Computers
Languages : en
Pages : 174

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Book Description
Embedded core processors are becoming a vital part of today's system-on-a-chip in the growing areas of telecommunications, multimedia and consumer electronics. This is mainly in response to a need to track evolving standards with the flexibility of embedded software. Consequently, maintaining the high product performance and low product cost requires a careful design of the processor tuned to the application domain. With the increased presence of instruction-set processors, retargetable software compilation techniques are critical, not only for improving engineering productivity, but to allow designers to explore the architectural possibilities for the application domain. Retargetable Compilers for Embedded Core Processors, with a Foreword written by Ahmed Jerraya and Pierre Paulin, overviews the techniques of modern retargetable compilers and shows the application of practical techniques to embedded instruction-set processors. The methods are highlighted with examples from industry processors used in products for multimedia, telecommunications, and consumer electronics. An emphasis is given to the methodology and experience gained in applying two different retargetable compiler approaches in industrial settings. The book also discusses many pragmatic areas such as language support, source code abstraction levels, validation strategies, and source-level debugging. In addition, new compiler techniques are described which support address generation for DSP architecture trends. The contribution is an address calculation transformation based on an architectural model. Retargetable Compilers for Embedded Core Processors will be of interest to embedded system designers and programmers, the developers of electronic design automation (EDA) tools for embedded systems, and researchers in hardware/software co-design.

Author: Jason D. Bakos
Publisher: Morgan Kaufmann
ISBN: 0128004126
Category : Computers
Languages : en
Pages : 317

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Book Description
Embedded Systems: ARM Programming and Optimization combines an exploration of the ARM architecture with an examination of the facilities offered by the Linux operating system to explain how various features of program design can influence processor performance. It demonstrates methods by which a programmer can optimize program code in a way that does not impact its behavior but improves its performance. Several applications, including image transformations, fractal generation, image convolution, and computer vision tasks, are used to describe and demonstrate these methods. From this, the reader will gain insight into computer architecture and application design, as well as gain practical knowledge in the area of embedded software design for modern embedded systems. Covers three ARM instruction set architectures, the ARMv6 and ARMv7-A, as well as three ARM cores, the ARM11 on the Raspberry Pi, Cortex-A9 on the Xilinx Zynq 7020, and Cortex-A15 on the NVIDIA Tegra K1 Describes how to fully leverage the facilities offered by the Linux operating system, including the Linux GCC compiler toolchain and debug tools, performance monitoring support, OpenMP multicore runtime environment, video frame buffer, and video capture capabilities Designed to accompany and work with most of the low cost Linux/ARM embedded development boards currently available

Author: Andreas Krall
Publisher: Springer Science & Business Media
ISBN: 3540201459
Category : Computers
Languages : en
Pages : 414

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Book Description
This book constitutes the refereed proceedings of the 7th International Workshop on Software and Compilers for Embedded Systems, SCOPES 2003, held in Vienna, Austria in September 2003. The 26 revised full papers presented were carefully reviewed and selected from 43 submissions. The papers are organized in topical sections on code size reduction, code selection, loop optimizations, automatic retargeting, system design, register allocation, offset assignment, analysis and profiling, and memory and cache optimzations.