BootChart

 Bootchart is a tool for performance analysis and visualization of the GNU/Linux boot process. Resource utilization and process information are collected during the boot process and are later rendered in a PNG, SVG or EPS encoded chart. 

"The challenge is to create a single poster showing graphically what is going on during the boot, what is the utilization of resources, how the current boot differs from the ideal world of 100% disk and CPU utilization, and thus, where are the opportunities for optimization."  

Bootchart provides a shell script to be run by the kernel in the init phase. The script will run in background and collect process information, CPU statistics and disk usage statistics from the /proc file system. The performance data are stored in memory and are written to disk once the boot process completes.

The boot log file is later processed using a Java application (or the web form) which builds the process tree and renders a performance chart in different formats: 

The chart can then be analyzed to examine process dependency and overall resource utilization

 

编译bootchart.jar 

jackie_gnu@host:~/test/bootchart/bootchart-0.9$ antBuildfile: build.xmlprepare:    [mkdir] Created dir: /home/jackie_gnu/test/bootchart/bootchart-0.9/buildclasses:    [javac] Compiling 28 source files to /home/jackie_gnu/test/bootchart/bootchart-0.9/build    [javac] Note: /home/jackie_gnu/test/bootchart/bootchart-0.9/lib/org/apache/commons/cli/TypeHandler.java uses or overrides a deprecated API.    [javac] Note: Recompile with -Xlint:deprecation for details.    [javac] Note: Some input files use unchecked or unsafe operations.    [javac] Note: Recompile with -Xlint:unchecked for details.    [javac] Compiling 26 source files to /home/jackie_gnu/test/bootchart/bootchart-0.9/build    [javac] Note: Some input files use unchecked or unsafe operations.    [javac] Note: Recompile with -Xlint:unchecked for details.jar:      [jar] Building jar: /home/jackie_gnu/test/bootchart/bootchart-0.9/bootchart.jarjavadoc:    [mkdir] Created dir: /home/jackie_gnu/test/bootchart/bootchart-0.9/javadoc/api  [javadoc] Generating Javadoc  [javadoc] Javadoc execution  [javadoc] Loading source files for package org.bootchart...  [javadoc] Loading source files for package org.bootchart.common...  [javadoc] Loading source files for package org.bootchart.parser...  [javadoc] Loading source files for package org.bootchart.parser.linux...  [javadoc] Loading source files for package org.bootchart.renderer...  [javadoc] Constructing Javadoc information...  [javadoc] Standard Doclet version 1.6.0_18  [javadoc] Building tree for all the packages and classes...  [javadoc] Building index for all the packages and classes...  [javadoc] Building index for all classes...all:BUILD SUCCESSFULTotal time: 9 seconds

 

生成bootchart.png

java -jar bootchar.jar example/bootchart.tgz bootchart.png