Examples with RealHistogram com.twitter.common.stats.testing.RealHistogram used on opensource projects

Example 1 with RealHistogram

use of com.twitter.common.stats.testing.RealHistogram in project commons by twitter.

the class WindowedHistogramTest method testWinHistogramAccuracy.

@Test
public void testWinHistogramAccuracy() {
    FakeClock ticker = new FakeClock();
    Amount<Long, Time> window = Amount.of(100L, Time.MILLISECONDS);
    int slices = 10;
    Amount<Long, Time> sliceDuration = Amount.of(window.as(Time.NANOSECONDS) / slices, Time.NANOSECONDS);
    WindowedHistogram<?> wh = createFullHistogram(window, slices, ticker);
    RealHistogram rh = fillHistogram(new RealHistogram(), sliceDuration, slices, new FakeClock());
    assertEquals(wh.getQuantile(0.5), rh.getQuantile(0.5));
    assertEquals(wh.getQuantile(0.75), rh.getQuantile(0.75));
    assertEquals(wh.getQuantile(0.9), rh.getQuantile(0.9));
    assertEquals(wh.getQuantile(0.99), rh.getQuantile(0.99));
}

Example 2 with RealHistogram

use of com.twitter.common.stats.testing.RealHistogram in project commons by twitter.

the class MetricsPrecisionDemo method main.

public static void main(String[] args) {
    MetricsPrecisionDemo demo = new MetricsPrecisionDemo();
    for (int n = 100; n <= 1000 * 1000; n *= 10) {
        for (long mem = 4; mem < 16; mem += 2) {
            Amount<Long, Data> maxMemory = Amount.of(mem, Data.KB);
            System.out.println("\nnumber of elements:" + n + "  maxMemory:" + maxMemory);
            System.out.println("Real data");
            demo.testHistogram(new ApproximateHistogram(maxMemory), new RealHistogram(), demo.getRealData(n));
            System.out.println("Random data");
            demo.testHistogram(new ApproximateHistogram(maxMemory), new RealHistogram(), demo.getRandomData(n, 100000, 200000));
        }
    }
}