The intention is to establish a theoretical limit for the expense, given some degree of concurrency. In reality, the expense should always be greater, since the time is not just split by the number of cores; rather we need to chain up existing jobs of various weight on the available cores (which is a special case of the box packing problem). With this formula, an ideal weight factor can be determined for each level, and then summing up the sequence of levels gives us a guess for a sensible timing for the overall scheduler |
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