Getting ready

Static tracepoints can be instrumented using custom kernel modules, and also through the event tracing infrastructure. Enabling any of the tracing features in the kernel will create a /sys/kernel/debug/tracing/ directory; for example, the function tracing feature as explained in the Using the kernel function tracing system in Chapter 2, The BSP Layer.

So before continuing with this recipe, you need to configure the function tracing feature in the Linux kernel as explained before.

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