Chapter 6. CPUs

CPUs execute all software and are a common starting point for performance analysis. If you find a workload to be limited by the CPUs (“CPU bound”), you can investigate further by using CPU and processor-centric tools. There are countless sampling profilers and metrics available to help you understand CPU usage. Nonetheless (if perhaps surprisingly), there are still a number of areas where BPF tracing can help even further with CPU analysis.

Learning Objectives:

  • Understand CPU modes, the behavior of the CPU scheduler, and CPU caches

  • Understand areas for CPU scheduler, usage, and hardware analysis with BPF

  • Learn a strategy for successful analysis of CPU performance

  • Solve issues of short-lived processes consuming CPU resources ...

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