On Sat, Feb 7, 2009 at 6:57 PM, Amit k. Saha <amitsaha...@gmail.com> wrote: > Hell all,
Hello all :-) > > I am working on an article on DTrace. I am trying to explain that > there are basically two (or more?) ways in which probes can be written > for user level processes. Here is what I know and have written: > > "" > > For user-level code, there are two ways in which probes can be > defined- User-Level Statically Defined Tracing (USDT) or PID provider. > > In USDT, custom probe points are inserted into application code > according to well defined guidelines and practices. Once the custom > probe points are integrated and the application code is compiled and > the binary is run, the probes become available for consumption by > DTrace user level consumers. Note that, the probe points are activated > only when the binary is running. > > Does this mean that DTrace cannot be used with applications with no > USDT probes defined? No. > > The PID provider can be used to probe any user level process, whether > USDT probes was defined for it or not. Using the PID provider is a > very generic and easy way to play around with DTrace. Code a simple > application in your favorite programming language and have fun with > DTrace by observing the function call flow, stack trace and lots more > """ > > Could any of you please verify the correctness of what I know? > > > Thanks a lot! > > Best, > Amit > -- > Amit Kumar Saha > http://amitksaha.blogspot.com > http://amitsaha.in.googlepages.com/ > *Bangalore Open Java Users Group*:http:www.bojug.in > > "Recursion is the basic iteration mechanism in Scheme" > --- http://c2.com/cgi/wiki?TailRecursion > -- Amit Kumar Saha http://amitksaha.blogspot.com http://amitsaha.in.googlepages.com/ *Bangalore Open Java Users Group*:http:www.bojug.in "Recursion is the basic iteration mechanism in Scheme" --- http://c2.com/cgi/wiki?TailRecursion _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
