What's a good real-time log watching program?

This is something I've wanted for a while but not had the inclination to get 
it going.  The thing that finally made me want to do it is when my workstation 
gave the below log messages and decided to stop supporting USB 3.0 ports.  As 
the ports that are most convenient for connecting my keyboard and mouse are 
USB 3.0 that was inconvenient.  Removing the xhci modules and loading them 
again fixed the problem.  So what I want in this instance is a program that 
will detect one of the below messages and then run a script that will run some 
rmmod and modprobe commands to fix it.  I want it to know which log entries it 
has dealt with to avoid performing the operation twice (which would cause 
problems) or maybe have a list of log messages in the problem solved category.

Any suggestions?


[18408.111698] xhci_hcd 0000:06:00.0: xHCI host not responding to stop 
endpoint command.
[18408.111716] xhci_hcd 0000:06:00.0: xHCI host controller not responding, 
assume dead
[18408.111738] xhci_hcd 0000:06:00.0: HC died; cleaning up
[18408.111747] xhci_hcd 0000:06:00.0: Timeout while waiting for configure 
endpoint command