Placeholder for benchmarking commands

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First off, I'd suggest printing out a copy of the GNU coding standards, and NOT read it. Burn them, it's a great symbolic gesture.

https://wiki.linuxfoundation.org/images/1/1c/Network_data_flow_through_kernel.png https://wiki.linuxfoundation.org/networking/kernel_flow

perf uses kprobes/uprobes for dynamique tracing.

perf for Performance counter but also uses ftrace for PERF_TYPE_TRACEPOINT. results are written to ringbuffer with mmap.

http://lxr.linux.no/#linux+v2.6.39/tools/perf/design.txt