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Introduction ------------ 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 can later be displayed in a PNG, SVG or EPS-encoded chart. The boot process is modified to start the boot logger (/sbin/bootchartd) instead of /sbin/init. The boot logger will run in background and collect information from the proc file system (/proc/[PID]/stat, /proc/stat and /proc/diskstats). The statistics are logged to a virtual memory file system (tmpfs). Once the boot process completes (denoted by the existence of specific processes), the log files are packaged to /var/log/bootchart.tgz. The log package can later be processed using a Java application which builds the process tree and renders a performance chart. The chart may then be analyzed to examine process dependency and overall resource utilization. A renderer web form is also available on the project web site. Running ------- 1. Install bootchartd and the bootchart renderer. See INSTALL for details. 2. Modify your boot loader (GRUB/LILO) if necessary. Alternatively, change the kernel command line interactively upon reboot. Reboot. 3. Verify that /var/log/bootchart.tgz was created and contains the log files. 4. Render the chart by running: $ java -jar bootchart.jar Alternatively (if no Java Development Kit is installed to build the JAR package), the web renderer may be used. The web form is available at: http://www.bootchart.org To use the web renderer from a script, run: curl --form format=svg --form log=@/var/log/bootchart.tgz \ http://bootchart.klika.si:8080/bootchart/render > bootchart.svgz (optionally replacing the svg/bootchart.svgz pair with png/bootchart.png or eps/bootchart.eps.gz) 5. View the generated image and analyze the chart. SVG images may be viewed using any of the following programs: - rsvg-view (librsvg; GNOME) - svgdisplay (ksvg; KDE) - Gimp (using the gimp-svg plugin) - Inkscape - Squiggle (Batik; http://xml.apache.org/batik/) To get help for additional options, run: $ java -jar bootchart -h http://www.bootchart.org Ziga Mahkovec <ziga.mahkovec@klika.si>
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