library/cpp/monlib/counters/histogram.cpp


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#include "histogram.h" 
 
namespace NMonitoring { 
    void THistogramSnapshot::Print(IOutputStream* out) const { 
        (*out) << "mean: " << Mean 
               << ", stddev: " << StdDeviation 
               << ", min: " << Min 
               << ", max: " << Max 
               << ", 50%: " << Percentile50 
               << ", 75%: " << Percentile75 
               << ", 90%: " << Percentile90 
               << ", 95%: " << Percentile95 
               << ", 98%: " << Percentile98 
               << ", 99%: " << Percentile99 
               << ", 99.9%: " << Percentile999
               << ", count: " << TotalCount;
    } 
 
    void THdrHistogram::TakeSnaphot(THistogramSnapshot* snapshot) { 
        with_lock (Lock_) { 
            // TODO: get data with single traverse 
            snapshot->Mean = Data_.GetMean(); 
            snapshot->StdDeviation = Data_.GetStdDeviation(); 
            snapshot->Min = Data_.GetMin(); 
            snapshot->Max = Data_.GetMax(); 
            snapshot->Percentile50 = Data_.GetValueAtPercentile(50.0); 
            snapshot->Percentile75 = Data_.GetValueAtPercentile(75.0); 
            snapshot->Percentile90 = Data_.GetValueAtPercentile(90.0); 
            snapshot->Percentile95 = Data_.GetValueAtPercentile(95.0); 
            snapshot->Percentile98 = Data_.GetValueAtPercentile(98.0); 
            snapshot->Percentile99 = Data_.GetValueAtPercentile(99.0); 
            snapshot->Percentile999 = Data_.GetValueAtPercentile(99.9); 
            snapshot->TotalCount = Data_.GetTotalCount();
 
            // cleanup histogram data 
            Data_.Reset(); 
        } 
    } 
 
}