gem5 Simulator System.  http://gem5.org
gem5 is copyrighted software; use the --copyright option for details.

gem5 compiled Jul  8 2015 14:45:30
gem5 started Jul  8 2015 14:46:17
gem5 executing on galapagos-15.cs.wisc.edu
command line: build/ALPHA/gem5.opt -d build/ALPHA/tests/opt/quick/se/03.learning-gem5/alpha/linux/learning-gem5-p1-two-level -re /afs/cs.wisc.edu/p/multifacet/users/powerjg/gem5-tutorial/gem5/tests/run.py build/ALPHA/tests/opt/quick/se/03.learning-gem5/alpha/linux/learning-gem5-p1-two-level

Global frequency set at 1000000000000 ticks per second
Beginning simulation!
info: Entering event queue @ 0.  Starting simulation...
info: Increasing stack size by one page.
Hello world!
Exiting @ tick 61608000 because target called exit()