--- instance0 ---
received 5 messages
0x500
0x501
0x502
0x503
0x504
done
--- instance1 ---
0 cancel result True
0 send result True
1 cancel result True
1 send result True
2 cancel result True
2 send result True
3 cancel result True
3 send result True
4 cancel result True
4 send result True
total cancels 5
total sent OK
