brendangregg/perf-tools — pull request #7 by csfrancis (2014-09-07 18:56:13+00:00)
Title: Add support for TCP tail loss probes

Adds support for [TCP tail loss probes](http://lwn.net/Articles/542642/) to tcpretrans.

This adds another column to the output - a boolean column that indicates if the retransmit was a tail loss probe:

```
TIME PID LADDR:LPORT -- RADDR:RPORT STATE TLP
18:42:32 0 172.16.1.149:49509 R> 172.16.4.53:9092 ESTABLISHED Y
```