[Discuss-gnuradio] Profiling, stopping the flow graph

[Dan Halperin]

Hi,

What options are there for profiling GNU Radio code? I've done some
Python profiling, and some C profiling, but what options are there for
this crazy SWIG-driven mix of the two?

Also, a flow graph question. In the main loop of the transmit path of my
benchmarking program, I have the following (hopefully self-explanatory
code):

        fg.start()

        self.num_to_send = options.packets
        self.bytes_per_packet = options.bytes
        util.rand_init(options.seed)

        for i in range(self.num_to_send):
            # generate random payload here into buf
            buf = util.random_bytes(self.bytes_per_packet)
            if i % 10 == 0:
                print "> sending packet #", i
            mac.send_buffer_unreliably(buf)
#            sleep(.01)

#        sleep (1)
#        sys.exit(0)

        fg.stop()     # tell flow graph to stop.
        fg.wait()     # wait for it to finish

If the sleep(.01) line is uncommented, then the flow graph does not
stop, and instead I quit using the sleep(1); sys.exit(0); however
everything works fine with no sleeping. What could be causing this? Is
it something weird involving code running in the same thread that
shouldn't be?

Thanks,

Dan