Decided this evening to grab some quick profile data for a uhd_fft.py,
running at 50Msps from a USRP2.
The kernel was occupied 41% of the time–no great surprise. Handling
interrupts, doing the network stack “stuff”.
The next largest chunk was libc (memcpy_sse) 12.5%
Then uhd (convert_sc8_item32_1_to_fcxx_1) 11.4%
Then libgnuradio-core 7.5%
So, the big surprise there was that libpython was so high on the list,
since Python isn’t used in copying data within the flow-graph. I didn’t
get any symbol information for libpython, so I wonder what it is
doing all that time?
Shirleys Bay Radio Astronomy Consortium