Systems Performance


Book Description

The Complete Guide to Optimizing Systems Performance Written by the winner of the 2013 LISA Award for Outstanding Achievement in System Administration Large-scale enterprise, cloud, and virtualized computing systems have introduced serious performance challenges. Now, internationally renowned performance expert Brendan Gregg has brought together proven methodologies, tools, and metrics for analyzing and tuning even the most complex environments. Systems Performance: Enterprise and the Cloud focuses on Linux(R) and Unix(R) performance, while illuminating performance issues that are relevant to all operating systems. You'll gain deep insight into how systems work and perform, and learn methodologies for analyzing and improving system and application performance. Gregg presents examples from bare-metal systems and virtualized cloud tenants running Linux-based Ubuntu(R), Fedora(R), CentOS, and the illumos-based Joyent(R) SmartOS(TM) and OmniTI OmniOS(R). He systematically covers modern systems performance, including the "traditional" analysis of CPUs, memory, disks, and networks, and new areas including cloud computing and dynamic tracing. This book also helps you identify and fix the "unknown unknowns" of complex performance: bottlenecks that emerge from elements and interactions you were not aware of. The text concludes with a detailed case study, showing how a real cloud customer issue was analyzed from start to finish. Coverage includes - Modern performance analysis and tuning: terminology, concepts, models, methods, and techniques - Dynamic tracing techniques and tools, including examples of DTrace, SystemTap, and perf - Kernel internals: uncovering what the OS is doing - Using system observability tools, interfaces, and frameworks - Understanding and monitoring application performance - Optimizing CPUs: processors, cores, hardware threads, caches, interconnects, and kernel scheduling - Memory optimization: virtual memory, paging, swapping, memory architectures, busses, address spaces, and allocators - File system I/O, including caching - Storage devices/controllers, disk I/O workloads, RAID, and kernel I/O - Network-related performance issues: protocols, sockets, interfaces, and physical connections - Performance implications of OS and hardware-based virtualization, and new issues encountered with cloud computing - Benchmarking: getting accurate results and avoiding common mistakes This guide is indispensable for anyone who operates enterprise or cloud environments: system, network, database, and web admins; developers; and other professionals. For students and others new to optimization, it also provides exercises reflecting Gregg's extensive instructional experience.




Past Performance Handbook


Book Description

The Best Guide to Past Performance Evaluation in Government Contracting Just Got Better! The Past Performance Handbook has long been the resource contracting professionals have turned to for guidance on evaluating contractor performance and making award decisions in competitive acquisitions based on the evaluation results. Now this essential resource has been completely updated and revised to bring readers the most up-to-date information they need to conduct past performance evaluations. Past Performance Handbook: Applying Commercial Practices to Federal Procurement, Second Edition, not only includes a detailed explanation of the process of past performance evaluation, but also presents new approaches to standardizing assessment areas and rating scales, streamlining the source selection process, and ensuring that awards are made to the most qualified offerors. This thoroughly revised second edition offers: • Additional focus on the collaboration between the government and contractors in providing past performance information • Enhanced definitions of numerical scoring, adjectival ratings, color coding schema, and risk assessments — all consistent with the current guidelines issued by the Department of Defense and the Office of Federal Procurement Policy (OFPP) • Updated citations from the Federal Acquisition Regulation, OFPP, and the Government Accountability Office (GAO) • Abridged GAO decisions that provide details for citations included in the text. Contracting officers and contractors working with the government will find value in every chapter of this updated edition.




High-Performance Training for Sports


Book Description

High-Performance Training for Sports changes the landscape of athletic conditioning and sports performance. This groundbreaking work presents the latest and most effective philosophies, protocols and programmes for developing today’s athletes. High-Performance Training for Sports features contributions from global leaders in athletic performance training, coaching and rehabilitation. Experts share the cutting-edge knowledge and techniques they’ve used with Olympians as well as top athletes and teams from the NBA, NFL, MLB, English Premier League, Tour de France and International Rugby. Combining the latest science and research with proven training protocols, High-Performance Training for Sports will guide you in these areas: • Optimise the effectiveness of cross-training. • Translate strength into speed. • Increase aerobic capacity and generate anaerobic power. • Maintain peak conditioning throughout the season. • Minimise the interference effect. • Design energy-specific performance programmes. Whether you are working with high-performance athletes of all ages or with those recovering from injury, High-Performance Training for Sports is the definitive guide for developing all aspects of athletic performance. It is a must-own guide for any serious strength and conditioning coach, trainer, rehabilitator or athlete.




Systems Performance


Book Description

Systems Performance, Second Edition, covers concepts, strategy, tools, and tuning for operating systems and applications, using Linux-based operating systems as the primary example. A deep understanding of these tools and techniques is critical for developers today. Implementing the strategies described in this thoroughly revised and updated edition can lead to a better end-user experience and lower costs, especially for cloud computing environments that charge by the OS instance. Systems performance expert and best-selling author Brendan Gregg summarizes relevant operating system, hardware, and application theory to quickly get professionals up to speed even if they have never analyzed performance before. Gregg then provides in-depth explanations of the latest tools and techniques, including extended BPF, and shows how to get the most out of cloud, web, and large-scale enterprise systems. Key topics covered include Hardware, kernel, and application internals, and how they perform Methodologies for rapid performance analysis of complex systems Optimizing CPU, memory, file system, disk, and networking usage Sophisticated profiling and tracing with perf, Ftrace, and BPF (BCC and bpftrace) Performance challenges associated with cloud computing hypervisors Benchmarking more effectively Featuring up-to-date coverage of Linux operating systems and environments, Systems Performance, Second Edition, also addresses issues that apply to any computer system. The book will be a go-to reference for many years to come and, like the first edition, required reading at leading tech companies. Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details.




Handbook of Self-Regulation of Learning and Performance


Book Description

Self-regulated learning (or self-regulation) refers to the process whereby learners personally activate and sustain cognitions, affects, and behaviours that are systematically oriented toward the attainment of learning goals. This is the first volume to integrate into a single volume all aspects of the field of self-regulation of learning and performance: basic domains, applications to content areas, instructional issues, methodological issues, and individual differences. It draws on research from such diverse areas as cognitive, educational, clinical, social, and organizational psychology. Distinguishing features include: Chapter Structure – To ensure uniformity and coherence across chapters, each chapter author addresses the theoretical ideas underlying their topic, research evidence bearing on these ideas, future research directions, and implications for educational practice. International – Because research on self-regulation is increasingly global, a significant number of interntional contributors are included (see table of contents). Readable – In order to make the book accessible to students, chapters have been carefully edited for clarity, conciseness, and organizational consistency. Expertise – All chapters are written by leading researchers from around the world who are highly regarded experts on their particular topics and are active contributors to the field.




The Cambridge Handbook of Expertise and Expert Performance


Book Description

In this book, some of the world's foremost 'experts on expertise' provide scientific knowledge on expertise and expert performance.




The Effective Manager


Book Description

The how-to guide for exceptional management from the bottom up The Effective Manager is a hands-on practical guide to great management at every level. Written by the man behind Manager Tools, the world's number-one business podcast, this book distills the author's 25 years of management training expertise into clear, actionable steps to start taking today. First, you'll identify what "effective management" actually looks like: can you get the job done at a high level? Do you attract and retain top talent without burning them out? Then you'll dig into the four critical behaviors that make a manager great, and learn how to adjust your own behavior to be the leader your team needs. You'll learn the four major tools that should be a part of every manager's repertoire, how to use them, and even how to introduce them to the team in a productive, non-disruptive way. Most management books are written for CEOs and geared toward improving corporate management, but this book is expressly aimed at managers of any level—with a behavioral framework designed to be tailored to your team's specific needs. Understand your team's strengths, weaknesses, and goals in a meaningful way Stop limiting feedback to when something goes wrong Motivate your people to continuous improvement Spread the work around and let people stretch their skills Effective managers are good at the job and "good at people." The key is combining those skills to foster your team's development, get better and better results, and maintain a culture of positive productivity. The Effective Manager shows you how to turn good into great with clear, actionable, expert guidance.




High Performance Python


Book Description

Your Python code may run correctly, but you need it to run faster. Updated for Python 3, this expanded edition shows you how to locate performance bottlenecks and significantly speed up your code in high-data-volume programs. By exploring the fundamental theory behind design choices, High Performance Python helps you gain a deeper understanding of Python’s implementation. How do you take advantage of multicore architectures or clusters? Or build a system that scales up and down without losing reliability? Experienced Python programmers will learn concrete solutions to many issues, along with war stories from companies that use high-performance Python for social media analytics, productionized machine learning, and more. Get a better grasp of NumPy, Cython, and profilers Learn how Python abstracts the underlying computer architecture Use profiling to find bottlenecks in CPU time and memory usage Write efficient programs by choosing appropriate data structures Speed up matrix and vector computations Use tools to compile Python down to machine code Manage multiple I/O and computational operations concurrently Convert multiprocessing code to run on local or remote clusters Deploy code faster using tools like Docker




Web Performance Tuning


Book Description

This handbook is for anyone responsible for a Web site, from the person running a personal site off a Linux PC at home up to large corporate site managers who wants to improve their performance right now.