Investigating Issues in Linux Embedded Systems

Explore techniques for investigating issues in Linux embedded systems through this informative conference talk. Learn about common problems encountered during development of new products like SoCs and IC chips, and discover various Linux features and tools for troubleshooting. Gain insights into Yoshihiro Shimoda's experiences with Renesas R-Car Linux embedded systems, including case studies on USB HID driver issues, NFS rootfs problems, kernel panics, device driver probing failures, and performance concerns. Understand how to leverage debugging techniques such as #define DEBUG, memtest, ftrace, perf, and memory logging to identify root causes efficiently. Enhance your Linux embedded system development skills and streamline your troubleshooting process to save time and effort.

Intro
Overview of this session
When do we observe issues?
What kind of issues do we observe?
How to find the root cause?
Investigation ways - #define DEBUG
Investigation ways - memtest
Investigation ways - ftrace
Investigation ways - perf
Investigation ways - memory logging example
Case studies - The USB HID driver cannot work correctly
Case studies - NFS rootfs cannot work on a new SoC
Case studies - Kernel panic while data transferring
Case studies - Probing a device driver fails
Case studies - Performance issue
Summary