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By running native Linux applications in a 'Linux branded zone' under OpenSolaris, it's now possible to take adantage of Sun's slick DTrace facility.
To give an example of using DTrace on Linux applications, I needed an application to examine. I wanted a well known program that either didn't run on Solaris or operated sufficiently differently such examining the Linux version rather than the Solaris port made sense. I decided on /usr/bin/top partly because of the dramatic differences between how it operates on Linux vs. Solaris (due to the differences in /proc), but mostly because of what I've heard my colleague, Bryan, refer to as the "top problem": your system is slow, so you run top. What's the top process? Top!
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