Chris Quenelle is a tools developer at Oracle Corp. He's worked on performance and debugging tools at Sun and Oracle for over 15 years. He reads comic books and science fiction,and has more tivos than he can keep track of.

 

May 2006
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Anti-help

This is great. I’ve complained about vacuous GUI help before,but I was just faced with the worst example I’ve ever seen.  I almost laughed out loud when I saw it.  A file chooser comes up in this tool,and glued onto the left hand side of the file chooser is this fine specimen of [...]

vfork and posix_spawn

I’m not sure why this paper got called “Minimizing Memory Usage for Creating Application Subprocesses”,it should have been called “MT-safe vfork and posix_spawn“.  When UNIX was developed,processes were single-threaded,and this had some strong influences on a few of its basic mechanisms.  vfork() is one of those mechanisms.  If you’ve ever been bit [...]

Getting started with dtrace

Vijay forwarded me an email from Eugene and here’s what I wrote:

Eugene wrote:I have a code and I’d like to figure out where the user code is when brk is being called. Can this be done with truss? If it’s done with dtrace I need some serious handholding. Canned scripts (or whatever) would [...]