How to figure out rx flow graph for benchmark_rx_ofdm.py

Hi all,

I was tracing down the gnuradio code for benchmark_rx_ofdm.py
tb.start(), seems to start the scheduler in the c code and I don’t know
where to look next.

http://gnuradio.org/trac/attachment/wiki/Wireless/gr_ofdm.ppt?format=raw
has the flow graph for receiver.

Do you know how I can really find out in the code where each block is
located?

Thank you!

Mikie