[Mono-dev] [PATCH] Threadpool changes + performance counters

[Gonzalo Paniagua Javier]

Hello folks.

Attached is a patch that does a few changes to the threadpool:
        -There is a list of idle threads
        -Each of those idle threads wait on their own WaitHandle instead
        of all of them using the same semaphore. When a new work item is
        added, the job is assigned directly to an idle thread or a newly
        created one if possible and then the handle for that thread is
        signaled. Compare that to the current approach where all the
        threads in the pool compete to dequeue a job from the same
        queue.
        -New struct ThreadPool that brings together the bunch of static
        variable for each threadpool (IO and regular).
        -New performance counters: # of items added and its rate per
        threadpool. The rate will be used later, perhaps together with
        other perf. counters, to decide when idle threads should exit.

Any comments?

-Gonzalo

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