Trace viewing and analysis

As I mentioned the last time, we can use various tools other than the command line based babeltrace to help us view and analyse Common Trace Format (CTF) traces. There are a couple of graphical tools available, but I will only cover the most comprehensive one-TMF. In order to maintain the continuity of our thttpd experiment, let's trace it again while enabling the userspace events (- a -u options, as mentioned above) in addition to kernel events. Run the trace for some time while making some HTTP requests and generate the traces. I have already generated some traces if you need those. Get them from http://step.polymtl.ca/~suchakra/osfy/ osfy-thttpd-20140127-194024.tar.gz. We will need it later.