N
-------------------
1 + σ(N-1) + κ(N-1)
where ...
N = number of processes,
σ = amount of contention, ie the degree to which work is serial rather than parallel,
κ = cost of consistency: ie the work the system must do to synchronise shared data.
In English: capacity increases with the number of processes and decreases with contention and crosstalk.
Last updated 16 Aug 2019
