traffic: replace print to debug so we can control output
For performance test automation, we need to parse output from
script/traffic_replay
, but we were using print/debug and stdout/stderr
randomly, which means too much noise in output and the --debuglevel
option
can not actually control it.
This patch make the print/debug usage follow such convention:
- Use
print
directly for result we want in stdout - Use
debugN
methods for debug/progress info, which will check debuglevel and print to stderr if allowed