I just learned to use ftrace and perf and there are some stuff they are in common I don't understand--trace events. I guess they are some kernel internal functions, ftrace will record their name when they're called if they're enabled. Is that right? All the evens are sorted in groups listed below. Would someone tell me what they stand for or where I can get information about them in detail. thx.
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Each of those is the name of the code in the linux kernel which printed the log message. For example, rcu is the lockless list code. It stands for Read Copy Update. The names will roughly match up with names of files or directories in the kernel source. Look in the Documentation directory of the kernel source for more information.