history:

ghci Fib.hs 
ghci Fib.hs +RTS -N1
ghci Fib.hs +RTS -N4
ghc --make -threaded -fforce-recomp -O -rtsopts Fib.hs && ./Fib +RTS -N1 -sstderr
ghc --make -threaded -fforce-recomp -O -rtsopts Fib.hs && ./Fib +RTS -N2 -sstderr
ghc --make -threaded -fforce-recomp -O -rtsopts Fib.hs && ./Fib +RTS -N4 -sstderr
cabal update
cabal install parallel
cabal install ThreadScope
cabal install monad-par