ParkBench modules

  tick1  -- timer resolution
  tick2  -- timer tests
  rinf1  -- DO loops
  poly1  -- polynomial evaluation, cache tests
  poly2  -- polynomail evaluation, memory tests
  comms1 -- MPI ping-pong test
  comms2 -- message exchange test
  comms3 -- bandwidth saturation
  poly3  -- distributed polynomial evaluation
  synch1 -- barrier synchronization
  lu_solver -- LU factorization
  matmul -- matrix multiply
  trans  -- distributed matrix transpose
  qr     -- qr factorization
  trd    -- eigenvalues for symmetrix matrices
  mg     -- multigrid
  ft     -- NAS parallel FFT
  lu     -- NAS parallel LU factorization
  bt     -- NAS parallel block tridiagonal
  sp     -- NAS parallel scalar pentadiagonal