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POboost accumulator rolling count non zero
 

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    <p>I am trying to use accumulators to find out statistics for a given activity per sec. Below are the two stats I would like to compute</p> <ul> <li>Number of times activity has been triggered</li> <li><p>Sum of the total weight triggered by the activity.</p> <p>To achieve I have assumed a granularity by 10 msecs and considering 100 buckets ( per sec ).</p></li> <li>Actvity Thread inserts into accumulator whenever there is an event</li> <li>Null Activity Thread wakes up every 10 msecs to insert 0 in the weight.</li> </ul> <p>Psuedo code below</p> <pre><code>#include &lt;boost/accumulators/accumulators.hpp&gt; #include &lt;boost/accumulators/statistics/stats.hpp&gt; #include &lt;boost/accumulators/statistics/rolling_count.hpp&gt; #include &lt;boost/accumulators/statistics/rolling_sum.hpp&gt; using namespace boost::accumulators; #define MAX_WEIGHT 100 #define MAX_ACIVITY 10 accumulator_set&lt;double, features&lt;tag::rolling_count, tag::rolling_sum&gt; &gt; acc(tag::rolling_window::window_size = 100); void null_run()//invoked every 10 msecs { //mutex protected acc(0); } void activity_triggered(int weight) // triggered by an external event { //mutex protected acc(weight); if (checkStatus() == false) { printf("Max quantity per sec reached stop "); exit() } } bool checkStatus() { int weightPerSec = rolling_sum(acc); //here I would like to get the count only if non zero may be rolling_count_non_zero()?? int acitivitiesPersec = rolling_count(acc); if (weightPerSec &gt; MAX_WEIGHT) return false; if (acitivitiesPersec &gt; MAX_ACTIVITY) return false; return true; } </code></pre> <p>Using above technique i am able to achieve weight entered in the last second but how do I achieve how many times has the activity been triggered in the last sec using boost accumulators ?</p>
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