OpenSolaris

1. Project: Chime Visualization Tool for DTrace
   1. Installation
   2. Change Log
      1. Known Issues
   3. Displays
   4. Adding New Displays
      1. New Display Wizard
         1. Adding Drilldown
      2. Command Line
      3. XML Properties
   5. Java DTrace API
      1. jdtrace Example
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Screenshots of Displays from Steven Reynolds' 2007 JavaOne Presentation

Steven Reynolds presented Chime at JavaOne this month, and he posted his presentation slides and display descriptions here. I downloaded the displays from his page, ran them on my desktop, and took a screenshot of each one:

• java_method_calls.xml
• java_thread_method_calls.xml
• monitor_wait_times.xml

Java Method Calls

Java Thread Method Calls

Steven helpfully pointed out in the Description (above) a way to find thread IDs:

prstat -p <JVM pid> -L or prstat -p <JVM pid> -mL

The first time I ran the display, I neglected to scroll down the Description pane and missed that tip, but I ended up finding thread IDs my own way with Chime:

/opt/OSOL0chime/bin/chime -n 'syscall:::entry / execname == "java" / { @syscalls[pid, tid] = count(); }'

For those unfamiliar with the Chime -n option, check out how to generate displays on the Command Line.

Monitor Wait Times

Thanks Steven, and nice job! I hope you'll be presenting Chime at JavaOne again next year.