Is Parallel Programming Hard, And, If So, What Can You Do About It? pdf epub mobi txt 电子书 下载 2025

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The purpose of this book is to help you understand how to program shared-memory parallel machines without risking your sanity.1 By describing the algorithms and designs that have worked well in the past, we hope to help you avoid at least some of the pitfalls that have beset parallel projects. But you should think of this book as a foundation on which to build, rather than as a completed cathedral. Your mission, if you choose to accept, is to help make further progress in the exciting field of parallel programming, progress that should in time render this book obsolete. Parallel programming is not as hard as it is reputed, and it is hoped that this book makes it even

easier for you.

Paul McKenney is a Distinguished Engineer and CTO of Linux at

IBM's Linux Technology Center (LTC). He is the maintainer of

the Linux kernel's implementation of RCU and a contributor to

the user-level implementation. He chaired the Linux Plumbers

Conference Program Committee in 2009 and 2011, and served on

the Linux Kernel Summit Program Committee in 2010 and 2011.

He has published one netbook, one book chapter, and more than

one hundred papers and presentations, and holds more than 80

patents in the USA, PRC, and elsewhere.

1
Introduction
1.1 Historic Parallel Programming Difficulties . . . . . . . . . . . . . . . . .
1.2 Parallel Programming Goals . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 Productivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.3 Generality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Alternatives to Parallel Programming . . . . . . . . . . . . . . . . . . . .
1.3.1 Multiple Instances of a Sequential Application . . . . . . . . . .
1.3.2 Make Use of Existing Parallel Software . . . . . . . . . . . . . .
1.3.3 Performance Optimization . . . . . . . . . . . . . . . . . . . . .
1.4 What Makes Parallel Programming Hard? . . . . . . . . . . . . . . . . .
1.4.1 Work Partitioning . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.2 Parallel Access Control . . . . . . . . . . . . . . . . . . . . . . .
1.4.3 Resource Partitioning and Replication . . . . . . . . . . . . . . .
1.4.4 Interacting With Hardware . . . . . . . . . . . . . . . . . . . . .
1.4.5 Composite Capabilities . . . . . . . . . . . . . . . . . . . . . . .
1.4.6 How Do Languages and Environments Assist With These Tasks? .
1.5 Guide to This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.1 Quick Quizzes . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2 Sample Source Code . . . . . . . . . . . . . . . . . . . . . . . .
2 Hardware and its Habits
2.1 Overview . . . . . . . . . . . . . . .
2.1.1 Pipelined CPUs . . . . . . . .
2.1.2 Memory References . . . . .
2.1.3 Atomic Operations . . . . . .
2.1.4 Memory Barriers . . . . . . .
2.1.5 Cache Misses . . . . . . . . .
2.1.6 I/O Operations . . . . . . . .
2.2 Overheads . . . . . . . . . . . . . . .
2.2.1 Hardware System Architecture
2.2.2 Costs of Operations . . . . . .
2.3 Hardware Free Lunch? . . . . . . . .
2.3.1 3D Integration . . . . . . . .
2.3.2 Novel Materials and Processes
2.3.3 Special-Purpose Accelerators
2.3.4 Existing Parallel Software . .
2.4 Software Design Implications . . . . .
...
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