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Merge pull request #502 from adamsitnik/flameGraph
Flame Graph
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Windows; | ||
| using System.Windows.Controls; | ||
| using System.Windows.Media; | ||
| using System.Windows.Media.Imaging; | ||
| using System.Windows.Shapes; | ||
| using Microsoft.Diagnostics.Tracing.Stacks; | ||
|
|
||
| namespace PerfView | ||
| { | ||
| public static class FlameGraph | ||
| { | ||
| private static readonly FontFamily FontFamily = new FontFamily("Consolas"); | ||
| private static readonly Brush[] Brushes = GenerateBrushes(new Random(12345)); | ||
|
|
||
| /// <summary> | ||
| /// (X=0, Y=0) is the left bottom corner of the canvas | ||
| /// </summary> | ||
| public struct FlameBox | ||
| { | ||
| public readonly double Width, Height, X, Y; | ||
| public readonly CallTreeNode Node; | ||
|
|
||
| public FlameBox(CallTreeNode node, double width, double height, double x, double y) | ||
| { | ||
| Node = node; | ||
| Width = width; | ||
| Height = height; | ||
| X = x; | ||
| Y = y; | ||
| } | ||
| } | ||
|
|
||
| private struct FlamePair | ||
| { | ||
| public readonly FlameBox ParentBox; | ||
| public readonly CallTreeNode Node; | ||
|
|
||
| public FlamePair(FlameBox parentBox, CallTreeNode node) | ||
| { | ||
| ParentBox = parentBox; | ||
| Node = node; | ||
| } | ||
| } | ||
|
|
||
| public static IEnumerable<FlameBox> Calculate(CallTree callTree, double maxWidth, double maxHeight) | ||
| { | ||
| double maxDepth = GetMaxDepth(callTree.Root); | ||
| double boxHeight = maxHeight / maxDepth; | ||
| double pixelsPerIncusiveSample = maxWidth / callTree.Root.InclusiveMetric; | ||
|
|
||
| var rootBox = new FlameBox(callTree.Root, maxWidth, boxHeight, 0, 0); | ||
| yield return rootBox; | ||
|
|
||
| var nodesToVisit = new Queue<FlamePair>(); | ||
| nodesToVisit.Enqueue(new FlamePair(rootBox, callTree.Root)); | ||
|
|
||
| while (nodesToVisit.Count > 0) | ||
| { | ||
| var current = nodesToVisit.Dequeue(); | ||
| var parentBox = current.ParentBox; | ||
| var currentNode = current.Node; | ||
|
|
||
| double nextBoxX = (parentBox.Width - (currentNode.Callees.Sum(child => child.InclusiveMetric) * pixelsPerIncusiveSample)) / 2.0; // centering the starting point | ||
|
|
||
| foreach (var child in currentNode.Callees) | ||
| { | ||
| double childBoxWidth = child.InclusiveMetric * pixelsPerIncusiveSample; | ||
| var childBox = new FlameBox(child, childBoxWidth, boxHeight, parentBox.X + nextBoxX, parentBox.Y + boxHeight); | ||
| nextBoxX += childBoxWidth; | ||
|
|
||
| if (child.Callees != null) | ||
| nodesToVisit.Enqueue(new FlamePair(childBox, child)); | ||
|
|
||
| yield return childBox; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public static void Draw(IEnumerable<FlameBox> boxes, Canvas canvas) | ||
| { | ||
| canvas.Children.Clear(); | ||
|
|
||
| int index = 0; | ||
| foreach (var box in boxes) | ||
| { | ||
| FrameworkElement rectangle = CreateRectangle(box, ++index); | ||
|
|
||
| Canvas.SetLeft(rectangle, box.X); | ||
| Canvas.SetBottom(rectangle, box.Y); | ||
| canvas.Children.Add(rectangle); | ||
| } | ||
| } | ||
|
|
||
| public static void Export(Canvas flameGraphCanvas, string filePath) | ||
| { | ||
| var rectangle = new Rect(flameGraphCanvas.RenderSize); | ||
| var renderTargetBitmap = new RenderTargetBitmap((int)rectangle.Right, (int)rectangle.Bottom, 96d, 96d, PixelFormats.Default); | ||
| renderTargetBitmap.Render(flameGraphCanvas); | ||
|
|
||
| var pngEncoder = new PngBitmapEncoder(); | ||
| pngEncoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap)); | ||
|
|
||
| using (var file = System.IO.File.Create(filePath)) | ||
| pngEncoder.Save(file); | ||
| } | ||
|
|
||
| private static Brush[] GenerateBrushes(Random random) | ||
| => Enumerable.Range(0, 100) | ||
| .Select(_ => (Brush)new SolidColorBrush( | ||
| Color.FromRgb( | ||
| (byte)(205.0 + 50.0 * random.NextDouble()), | ||
| (byte)(230.0 * random.NextDouble()), | ||
| (byte)(55.0 * random.NextDouble())))) | ||
| .ToArray(); | ||
|
|
||
| private static double GetMaxDepth(CallTreeNode callTree) | ||
| { | ||
| double deepest = 0; | ||
|
|
||
| if (callTree.Callees != null) | ||
| foreach (var callee in callTree.Callees) | ||
| deepest = Math.Max(deepest, GetMaxDepth(callee)); | ||
|
|
||
| return deepest + 1; | ||
| } | ||
|
|
||
| private static FrameworkElement CreateRectangle(FlameBox box, int index) | ||
| { | ||
| var tooltip = $"Method: {box.Node.DisplayName} ({box.Node.InclusiveCount} inclusive samples, {box.Node.InclusiveMetricPercent:F}%)"; | ||
| var background = Brushes[++index % Brushes.Length]; // in the future, the color could be chosen according to the belonging of the method (JIT, GC, user code, OS etc) | ||
|
|
||
| // for small boxes we create Rectangles, because they are much faster (too many TextBlocks === bad perf) | ||
| // also for small rectangles it's impossible to read the name of the method anyway (only few characters are printed) | ||
| if (box.Width < 50) | ||
| return new Rectangle | ||
| { | ||
| Height = box.Height, | ||
| Width = box.Width, | ||
| Fill = background, | ||
| ToolTip = new ToolTip { Content = tooltip }, | ||
| DataContext = box.Node | ||
| }; | ||
|
|
||
| return new TextBlock | ||
| { | ||
| Height = box.Height, | ||
| Width = box.Width, | ||
| Background = background, | ||
| ToolTip = new ToolTip { Content = tooltip }, | ||
| Text = box.Node.DisplayName, | ||
| DataContext = box.Node, | ||
| FontFamily = FontFamily, | ||
| FontSize = Math.Min(20.0, box.Height) | ||
| }; | ||
| } | ||
| } | ||
| } |
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