DTrace for Linux

unfortunately, it doesn't look like we'll get the full experience.

Well, it is only pushed by RedHat (hence the adoption by Fedora only) so progress is slow. But steady I'd say. There are patch for a lots of server and SystemTap seems compatible with Dtrace entrypoints so I guess the thing now is to document it better.

A "state of the Union" document and good documentation and example would indeed be very welcome. It's a very promising and underestimated piece of technology. I'm really enthusiastic about it but I didn't take the time to study it yet.

systemtap adds a ton of complexity over dtrace. You can do more with it, but the really simple things that have large benefits are no longer really simple (which causes them to lose some of their benefit).

I've burned a lot of time trying to get it working on ubuntu -- one of my guys actually did by bringing over a fedora kernel. He said it wasn't easy.

I'm hoping Linux gets something like this in the mainline. I don't care of it's dtrace, systemtap, or something in between. This functionality is critical for both development and operation of production systems. Unfortunately, people don't seem to understand that until they have access to such a tool and realize they can answer all kinds of questions they never knew they could.