private void plotSubset(
final Graphics2D g,
final int start,
final int end,
final String title,
final double startX,
final double width,
final double stepY,
final double mean) {
final FontMetrics fm = g.getFontMetrics();
final Color color = g.getColor();
g.setColor(Color.black);
g.drawString(title, (int) (startX + width / 2 - fm.stringWidth(title) / 2), 975);
final String tmp = String.format("Mean: %.3fus", mean);
g.drawString(tmp, (int) (startX + width / 2 - fm.stringWidth(tmp) / 2), 990);
g.setColor(color);
final double stepX = width / (end - start);
for (int i = start; i < end; i++) {
final int posX = (int) (startX + stepX * (i - start));
final int posY = 960 - ((int) (stepY * (timestamps[i] / 1000.0)) + 1);
g.drawLine(posX, posY, posX, 960);
}
}
private void generateScatterPlot() throws IOException {
final BufferedImage image = new BufferedImage(1800, 1000, BufferedImage.TYPE_INT_ARGB);
final Graphics2D g2 = image.createGraphics();
final FontMetrics fm = g2.getFontMetrics();
final String filename = "throughputency.png";
final File imageFile = new File(filename);
final int height = 940;
double min = Double.MAX_VALUE;
double max = Double.MIN_VALUE;
for (final long timestamp : timestamps) {
final double ts = timestamp / 1000.0;
if (ts < min) {
min = ts;
}
if (ts > max) {
max = ts;
}
}
final double stepY = height / max;
g2.setColor(Color.white);
g2.fillRect(0, 0, 1800, 1000);
g2.setColor(Color.black);
g2.setRenderingHint(
RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
g2.drawString(
"Latency ScatterPlot (microseconds)",
900 - fm.stringWidth("Latency ScatterPlot (microseconds)") / 2,
20);
g2.drawString("" + max, 10, 20);
g2.drawLine(100, 20, 100, 960);
g2.drawLine(100, 960, 1790, 960);
int start = 0;
int end = 100;
final double width = 1690.0 / 7.0;
g2.setColor(Color.red);
plotSubset(g2, start, end, "10 msgs/sec", 100, width, stepY, means[0]);
start = 100;
end = 1100;
g2.setColor(Color.green);
plotSubset(g2, start, end, "100 msgs/sec", 100 + width, width, stepY, means[1]);
start = 1100;
end = 11100;
g2.setColor(Color.blue);
plotSubset(g2, start, end, "1K msgs/sec", 100 + width * 2, width, stepY, means[2]);
start = 11100;
end = 111100;
g2.setColor(Color.cyan);
plotSubset(g2, start, end, "10K msgs/sec", 100 + width * 3, width, stepY, means[3]);
start = 111100;
end = 1111100;
g2.setColor(Color.magenta);
plotSubset(g2, start, end, "100K msgs/sec", 100 + width * 4, width, stepY, means[4]);
start = 1111100;
end = 11111100;
g2.setColor(Color.yellow);
plotSubset(g2, start, end, "1M msgs/sec", 100 + width * 5, width, stepY, means[5]);
start = 11111100;
end = 41111100;
g2.setColor(Color.orange);
plotSubset(g2, start, end, "3M msgs/sec", 100 + width * 6, width, stepY, means[6]);
ImageIO.write(image, "png", imageFile);
}