ChronoSync

I made the change that if the exclude interest is greater than MAX_NDN_PACKET_SIZE then don't send it and return:

all_changes_here

Seems to work - NLSR can converge, recover.

Then I ran a few NLSR convergence experiments in Mini-NDN:

• 10 node experiment (run on my laptop)
  • NSync : 2150 Sync interests, converges in at least 35 seconds
  • Chronosync: 6320 Sync interests, converges in at least 35 seconds
• 33 node current testbed (run on powerful machine)
  • NSync : 12000 Sync interests, converges in at least 30 seconds
  • Chronosync: 31493 Sync interests, converges in at least 30 seconds

So the number of sync interests is greater 2.5 times from the old implementation.

I saw that exclude interest is sent upon every sync data received.
Alex's comment here confirms:
https://gerrit.named-data.net/#/c/3605/11/src/logic.cpp (Exclude filter change)

logic: Sending exclude filter always when receiving sync data is not ideal solution, as it simply inflates the number of interests sent.
The solution we thought would work is to send such interests only when simultaneous data generation is detected.
This will incur addition delay, but would not incur unnecessary cost.

If I want to follow this suggestion apart from the MAX_NDN_PACKET_SIZE one, how can I detect simultaneous data generation?

(I think this is the reason why I am getting the size error in the small 4 node topology (even 2 node topology) when there is only one node producing data in quick succession).