Enhancing Performance to Export Processor Hazard Information

Explore the intricacies of modern microprocessor instruction execution pipelines in this 28-minute conference talk from the Linux Plumbers Conference. Delve into the efficiency metrics of Instructions Per Cycle (IPC) and Cycles Per Instruction (CPI), and examine the various hazards affecting these metrics, including data, structural, and control hazards. Learn about the critical role of hazard information in performance analysis and software tuning. Discover a proposed architecture-neutral extension to perf for exporting hazard data from different architectures, with a focus on its application to IBM Power processors. Gain insights into the APIs and example outputs of this enhancement, covering topics such as basic instruction pipeline, puffs, memory data sources, data structures, and hazard information modes.

Introduction
Overview
Basic Instruction Pipeline
Puffs
Memory Data Source
Data Structure
Approach
Enhancements
Data dump
Hazard information mode
Questions