Added Node tracing section
Added Node tracing section

goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop