Installing and Using Perf tool

To Install perf:

apt-get install linux-tools-common

apt-get install linux-tools-generic

apt-get install linux-tools-`uname -r`

To start monitoring a service using perf (for 10 seconds): (link from Brendan Gregg)

perf record -p PID sleep 10

To report usage

perf report

I, Geek