Redirecting stdout to build/MIPS/tests/opt/quick/se/00.hello/mips/linux/simple-timing-ruby/simout Redirecting stderr to build/MIPS/tests/opt/quick/se/00.hello/mips/linux/simple-timing-ruby/simerr gem5 Simulator System. http://gem5.org gem5 is copyrighted software; use the --copyright option for details. gem5 compiled Sep 9 2012 13:41:09 gem5 started Sep 9 2012 13:41:16 gem5 executing on ribera.cs.wisc.edu command line: build/MIPS/gem5.opt -d build/MIPS/tests/opt/quick/se/00.hello/mips/linux/simple-timing-ruby -re tests/run.py build/MIPS/tests/opt/quick/se/00.hello/mips/linux/simple-timing-ruby Global frequency set at 1000000000 ticks per second info: Entering event queue @ 0. Starting simulation... info: Increasing stack size by one page. Hello World! Exiting @ tick 125334 because target called exit()