Fast retransmit

fr_ev
The number of Fast retransmit events occurred during the lifetime of a connection.

fr_repkts
The number of packets retransmitted during Fast retransmit events.

fr_wait
The wait time of Fast retransmit events.

fr_rec
The recovery time of Fast retransmit events.

fr_undo
The supurious times of Fast retransmit events.

Timeout

to_ev
The number of Timeout events occurred during the lifetime of a connection.

to_repkts
The number of packets retransmitted during Timeout events.

to_wait
The wait time of Timeout events.

to_rec
The recovery time of Timeout events.

to_undo
The supurious times of Timeout events.

Furthermore, we classify Timeout events according to the congestion state during which they happen.