On Sun, 25 Jan 2015 16:29:00 -0800, "Robert P. J. Day" said: > what's wrong with ftrace? but seriously, you know what newcomers > might get some value out of doing if they want to contribute? writing > some really, really good documentation or tutorials.
If somebody were to do a really good "Top 25 perf/ftrace tricks/recipes" for the best incantations for common use cases, they'd have a hard time buying themselves a beer at a gathering of Linux geeks. ;) For example: "I don't care the exact function, but which .o or .so is my program spending its time in?" (And yes, this *does* come up a lot -for large programs, there's usually no one single function that burns enough CPU time to dominate - but if you look at the top 5 shared libraries, you can pretty much tell "Yeah, those 5 are where I expect it to be burning a lot of time" or "Wow, why is *that* library I've never heard of at number 2 on the list?"...)
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