13 ;;Quote: a scalable parallel system preserves efficiency if both processors and problem size increase together

14 ;;Quote: a parallel system consists of a parallel algorithm and a parallel architecture; they cannot be separated

14+;;Quote: the total overhead of a parallel system is a function of problem size and number of processors; overhead due to idling, communication, contention, etc.

14 ;;Quote: the isoefficiency function balances problem size with number of processors; a highly scalable system allows small increments in problem size to use increasing numbers of processors efficiently

15 ;;Quote: a parallel system is cost-optimal if the total parallel time is proportional to the best serial time

16 ;;Quote: use isoefficiency to compare two parallel algorithms; low overhead is not OK if it limits concurrency