-- | The memory used by instances on a given node.
iMem :: Node -> Int
iMem t = truncate (tMem t) - nMem t - xMem t - fMem t
iMem :: Node -> Int
iMem t = truncate (tMem t) - nMem t - xMem t - fMem t
iMem t = truncate (tMem t) - nMem t - xMem t - fMem t