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74a5981dbe
Use it to keep track of all permits that are currently waiting on something: admission, memory or execution. Currently we keep track of size, by adding up the result of size() of the various queues. In future patches we are going to change the queues such that they will not have constant time size anymore, move to an explicit counter in preperation to that. Another change this commit makes is to also include ready list entries in this counter. Permits in the ready list are also waiters, they wait to be executed. Soon we will have a separate wait state for this too.