Add truncation in TrackletProcessorDisplaced

[cgsavard]

PR description:

Truncation has never been added to the TrackletProcessorDisplaced module and so these changes implement truncation there using the maxstep_['TP'] value in Settings.h here (as the other displaced modules do). Truncation in extended tracking is turned off by default and so this doesn't change the performance of anything, but allows us to properly study truncation for the full extended chain.

PR validation:

After running a couple of checks, the behavior of these changes is exactly as expected. With truncation off, nothing changes. With truncation on, TrackletProcessorDisplaced is capping its processing of objects to the value set in Settings.h.

[aehart]

@cgsavard The only thing I would suggest is adding a separate "TPD" key to the maxstep_ map here:

cmssw/L1Trigger/TrackFindingTracklet/interface/Settings.h

Lines 883 to 901 in 87c8b05

	std::unordered_map<std::string, unsigned int> maxstep_{
	{"IR", 156}, //IR will run at a higher clock speed to handle
	//input links running at 25 Gbits/s
	//Set to 108 to match firmware project 240 MHz clock
	{"VMR", 107},
	{"TE", 107},
	{"TC", 108},
	{"PR", 108},
	{"ME", 108},
	//NOTE: The MC is set to 108, but `mergedepth`
	//removes 3 iterations to emulate the delay
	//due to the HLS priority encoder
	{"MC", 108},
	{"TB", 108},
	{"MP", 108},
	{"TP", 108},
	{"TRE", 108},
	{"DR", 108}}; //Specifies how many tracks allowed per bin in DR

And then use that instead of "TP" in the code you've added. I can see it being useful being able to turn truncation on and off for the prompt and displaced modules separately.

[cgsavard]

The only thing I would suggest is adding a separate "TPD" key to the maxstep_ map

Done!

[aehart]

The only thing I would suggest is adding a separate "TPD" key to the maxstep_ map

Done!

Thanks, @cgsavard! But you should also change "TP" to "TPD" in TrackletProcessorDisplaced.cc, in order to use the new key in maxstep_, and I think you accidentally changed the default algorithm in L1TrackNtupleMaker_cfg.py to HYBRID_DISPLACED. That's probably why the CI is now failing.

[cgsavard]

@aehart Ah yes, I accidentally added the wrong file to the commit. I just fixed the commit so hopefully everything is good now!

[aehart]

Looks good to me. I'll let @tomalin merge this, in case he has any comments.