From: "Steven Rostedt" <rostedt@xxxxxxxxxxx> To: "Philippe Duplessis-Guindon" <pduplessis@xxxxxxxxxxxx> Cc: "linux-trace-devel" <linux-trace-devel@xxxxxxxxxxxxxxx> Sent: Monday, June 1, 2020 2:36:43 PM Subject: Re: Ftrace plugin for Babeltrace2 On Mon, 1 Jun 2020 12:45:10 -0400 (EDT) Philippe Duplessis-Guindon <pduplessis@xxxxxxxxxxxx> wrote: >> Hi everyone, >> >> >> My name is Philippe and I am an intern at EfficiOs for the summer. This email is > Hi Philippe! > I believe we met before. Correct me if I'm wrong. You must be mistaking me with the other Philippe at EfficiOs. I am an intern who started last month! >> >> to inform you about my summer project, ask for recommendations and your opinion. >> >> >> My project will consist of implementing a Babeltrace2 [1] plugin to be able to consume >> >> ftrace traces. The plugin will act as a source component in the babeltrace2 graph system. > This is awesome! >> >> >> I was wondering if you can give me your first thoughts about this project, and >> >> any advice on where to find information to begin with, since I am new to ftrace. >> >> I have already read the doc [2][3][4], but I was wondering if there are more resources >> >> that could help me with my work. >> >> >> Also, I was wondering which version of libtraceevent I should use. The one in the kernel, >> >> or the one in the trace-cmd repo? My guess would be to take the one in trace-cmd since >> >> there are more recent commits, but I am asking just to make sure. > Well it shouldn't matter, as I try to keep the two insync, but because > of the current environment (COVID-19 and all), I've been falling behind. Perfect! > There's talk in moving it out of both the kernel and trace-cmd and make > libtraceevent a stand alone library. But that will take some > coordination. That would be great! >> >> >> The major focus of the project will be to match ftrace concepts to babeltrace 2 >> >> internal representation. >> >> >> [1] https://babeltrace.org/ >> >> [2] https://github.com/torvalds/linux/tree/master/tools/lib/traceevent/Documentation >> >> [3] https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git/tree/Documentation >> >> [4] https://www.kernel.org/doc/Documentation/trace/ftrace.txt >> > Ideally, we would like to get KernelShark to use babeltrace as well, to > increase what it can read. Sounds good, I'll have this in mind while implementing my plugin. > Thanks for reaching out. If there's anything else you need, please feel > free to ask. Thank you, Philippe
|