Bootchart

Bootchart is a tool for performance analysis and visualization of the Linux boot process. Resource utilization and process information are collected during the user-space portion of the boot process and are later rendered in a PNG, SVG or EPS encoded chart. For embedded systems several developers have tried to use bootchart to analyze boot time, but problems arose. There have been several efforts to modify bootchart to make it more useful for embedded development.

Bootchart-Lite

 * bootchart-lite-en.pdf Presentation by Shuuji Miyake of Fujitsu Software Technologies Limited, about bootchart deficiencies in the embedded space and ideas for fixing them.
 * Not sure this is related to bootchart-lite project on Google Code, below--that was created by Fred Chien of OpenMoko.
 * Bootchart-lite Project Home

ubootchart
Like Bootchart Lite, an implementation of the ideas from "embootchart".


 * ubootchart Project Home
 * Initial blog post

EmBootchart

 * Visualizing Resource Usage During Boot Presentation on 'embootchart' by Matthew Klahn and Moosa Muhammad of Motorola about bootchart deficiencies in the embedded space, and a program (unfortunately never published) to fix them.

BusyBox
Busybox has a C implementation of bootchartd. It compiles to less than 40k (static uclibc i386 build). It will be available in the busybox-1.17.0 release. Please send bug reports, improvements to busybox mailing list.


 * Busybox Project Home
 * bootchartd applet code

Usage: bootchartd start [PROG ARGS]|stop|init

Options:

start: start background logging; with PROG, run PROG, then kill logging with USR1

stop: send USR1 to all bootchartd processes

init: start background logging; stop when getty/xdm is seen (for init scripts)

Under PID 1: start background logging, then execute $bootchart_init, /init, /sbin/init

This makes it possible to start bootchartd even before init by booting kernel with:

init=/bin/bootchartd bootchart_init=/path/to/regular/init

SystemTap Scripts
A related project is a set of System Tap scripts to provide information about boot time. See Bootprobe