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Linux Foundation

We Need to Talk About Systemd - Boot Time Optimization for the New init daemon

Linux Foundation via YouTube

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Overview

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This course explains how systemd works and how its units and dependencies affect boot time. It demonstrates measuring systemd startup, removing unnecessary tasks, and reordering remaining tasks for faster boots.

Syllabus

Intro
About Chris Simmonds
What is an init daemon?
Init daemons for embedded use cases
Systemd is not just an init daemon
What are the advantages of systemd?
Units, services and targets
Unit dependencies
Order: Before and After
The default target
Reverse dependencies: WantedBy
The Install section
systemcti
Reducing boot time
Measuring systemd boot time
First attempt
systemd-analyze 3/3
2nd attempt
Other useful systemd features
Watchdog
Resource limits
systemd-analyze 2/3

Taught by

Linux Foundation

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