There is no --set-tags
option for 4.3. The way systrace works changed significantly, and the documentation hasn't yet been updated. (Edit: it has been updated for 4.3)
The systrace.py
script checks the device version, and forwards the commands to systrace-legacy.py
for pre-4.3 devices. That's why the old command still works for older devices.
An example for a 4.3 device would be:
python systrace.py gfx view sched dalvik
That is, you just list the tags you want as arguments to the command that starts the tracing.
I have an example (which also shows off the new app-defined tag feature) here.