Table of contents : Preface Acknowledgments About the Author 1 Introduction 2 Methodologies 3 Operating Systems 4 Observability Tools 5 Applications 6 CPUs 7 Memory 8 File Systems 9 Disks 10 Network 11 Cloud Computing 12 Benchmarking 13 perf 14 Ftrace 15 BPF 16 Case Study A USE Method: Linux B sar Summary C bpftrace One-Liners D Solutions to Selected Exercises E Systems Performance Who’s Who Glossary