Package com.higherfrequencytrading.testing

Examples of com.higherfrequencytrading.testing.Histogram


        t.start();

        Excerpt excerpt = tsc.createExcerpt();
        Excerpt excerpt2 = tsc2.createExcerpt();

        Histogram hist = new Histogram(100000, 1);
        long totalTime = 0, longDelays = 0;
        for (int i = 0; i < RUNS; i++) {
            excerpt.startExcerpt(8);
            excerpt.writeLong(nanoTime());
            excerpt.finish();

            while (!excerpt2.index(i)) {
                /* try again */
            }

            long time1 = nanoTime();
            long time0 = excerpt2.readLong();
            excerpt2.finish();
            if (i >= WARMUP) {
                final long latency = time1 - time0;
                if (latency < 0 || latency > 100000) {
                    longDelays++;
                    System.out.println(latency);
                }
                hist.sample(latency);
                totalTime += latency;
            }
        }

        t.join();
        tsc.close();
        tsc2.close();

        System.out.printf("The average RTT latency was %,d ns. The 50/99 / 99.9/99.99%%tile latencies were %,d/%,d / %,d/%,d. There were %,d delays over 100 μs%n",
                totalTime / RUNS, hist.percentile(0.5), hist.percentile(0.99), hist.percentile(0.999), hist.percentile(0.9999), longDelays);
    }
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        al.bind();
        Excerpt excerpt = tsc.createExcerpt();
        Excerpt excerpt2 = tsc2.createExcerpt();

        Histogram hist = new Histogram(100000, 1);
        long totalTime = 0, longDelays = 0;
        for (int i = 0; i < RUNS; i++) {
            excerpt.startExcerpt(8);
            excerpt.writeLong(nanoTime());
            excerpt.finish();

            do {
                busyWait();
            } while (!excerpt2.index(i));

            long time1 = nanoTime();
            long time0 = excerpt2.readLong();
            excerpt2.finish();
            if (i >= WARMUP) {
                final long latency = time1 - time0;
                if (latency < 0 || latency > 100000) {
                    longDelays++;
                    System.out.println(latency);
                }
                hist.sample(latency);
                totalTime += latency;
            }
        }

        t.join();
        tsc.close();
        tsc2.close();

        System.out.printf("The average RTT latency was %,d ns. The 50/99 / 99.9/99.99%%tile latencies were %,d/%,d / %,d/%,d. There were %,d delays over 100 μs%n",
                totalTime / RUNS, hist.percentile(0.5), hist.percentile(0.99), hist.percentile(0.999), hist.percentile(0.9999), longDelays);
        al.release();
    }
View Full Code Here

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