[Verse 1] Deep beneath the userland surface lies a treasure Hidden tracers in the kernel, tracking every measure Function calls cascade through layers, breadcrumbs in the code ftrace waits inside proc-slash-sys, ready to decode [Chorus] Trace cmd captures, filters, and displays Function graph reveals the call maze Set your tracer, mount debugfs first Ring buffer holds what kernels rehearse Echo function into current-tracer Watch the magic unfold, behavior unblurred [Verse 2] Debugfs mounted, twenty-eight gigs of tracing power Available tracers listed, choose your finest hour Function tracer shows the entries, graph shows call and return Indent levels paint the picture, watch the stack frames churn [Chorus] Trace cmd captures, filters, and displays Function graph reveals the call maze Set your tracer, mount debugfs first Ring buffer holds what kernels rehearse Echo function into current-tracer Watch the magic unfold, behavior unblurred [Bridge] Set func filter narrows focus, glob patterns work their charm Tracing on enables capture, buffer size prevents alarm Events from twenty subsystems, scheduler, memory, disk Trace cmd record saves sessions, trace cmd report can sift [Verse 3] Kprobes pierce any function, dynamic probes on demand Uprobes reach userspace targets, crossing kernel borderland Trace markers leave breadcrumbs, custom events you define Performance counters correlate, timestamp every line [Chorus] Trace cmd captures, filters, and displays Function graph reveals the call maze Set your tracer, mount debugfs first Ring buffer holds what kernels rehearse Echo function into current-tracer Watch the magic unfold, behavior unblurred [Outro] From boot trace to latency hunting Kernel secrets stop their shunting Ftrace reveals the hidden dance Giving systems engineers their chance
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