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Flame Graph support on Web UI (google#188)
Implements google#166.
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| Raul Silvera <[email protected]> | ||
| Tipp Moseley <[email protected]> | ||
| Hyoun Kyu Cho <[email protected]> | ||
| Martin Spier <[email protected]> | ||
| Taco de Wolff <[email protected]> | ||
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| // Copyright 2017 Google Inc. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| package driver | ||
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| import ( | ||
| "encoding/json" | ||
| "html/template" | ||
| "net/http" | ||
| "strings" | ||
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| "github.com/google/pprof/internal/graph" | ||
| "github.com/google/pprof/internal/measurement" | ||
| "github.com/google/pprof/internal/report" | ||
| ) | ||
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| type treeNode struct { | ||
| Name string `json:"n"` | ||
| Cum int64 `json:"v"` | ||
| CumFormat string `json:"l"` | ||
| Percent string `json:"p"` | ||
| Children []*treeNode `json:"c"` | ||
| } | ||
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| // flamegraph generates a web page containing a flamegraph. | ||
| func (ui *webInterface) flamegraph(w http.ResponseWriter, req *http.Request) { | ||
| // Force the call tree so that the graph is a tree. | ||
| // Also do not trim the tree so that the flame graph contains all functions. | ||
| rpt, errList := ui.makeReport(w, req, []string{"svg"}, "call_tree", "true", "trim", "false") | ||
| if rpt == nil { | ||
| return // error already reported | ||
| } | ||
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| // Generate dot graph. | ||
| g, config := report.GetDOT(rpt) | ||
| var nodes []*treeNode | ||
| nroots := 0 | ||
| rootValue := int64(0) | ||
| nodeMap := map[*graph.Node]*treeNode{} | ||
| // Make all nodes and the map, collect the roots. | ||
| for _, n := range g.Nodes { | ||
| v := n.CumValue() | ||
| node := &treeNode{ | ||
| Name: n.Info.PrintableName(), | ||
| Cum: v, | ||
| CumFormat: config.FormatValue(v), | ||
| Percent: strings.TrimSpace(measurement.Percentage(v, config.Total)), | ||
| } | ||
| nodes = append(nodes, node) | ||
| if len(n.In) == 0 { | ||
| nodes[nroots], nodes[len(nodes)-1] = nodes[len(nodes)-1], nodes[nroots] | ||
| nroots++ | ||
| rootValue += v | ||
| } | ||
| nodeMap[n] = node | ||
| } | ||
| // Populate the child links. | ||
| for _, n := range g.Nodes { | ||
| node := nodeMap[n] | ||
| for child := range n.Out { | ||
| node.Children = append(node.Children, nodeMap[child]) | ||
| } | ||
| } | ||
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| rootNode := &treeNode{ | ||
| Name: "root", | ||
| Cum: rootValue, | ||
| CumFormat: config.FormatValue(rootValue), | ||
| Percent: strings.TrimSpace(measurement.Percentage(rootValue, config.Total)), | ||
| Children: nodes[0:nroots], | ||
| } | ||
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| // JSON marshalling flame graph | ||
| b, err := json.Marshal(rootNode) | ||
| if err != nil { | ||
| http.Error(w, "error serializing flame graph", http.StatusInternalServerError) | ||
| ui.options.UI.PrintErr(err) | ||
| return | ||
| } | ||
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| ui.render(w, "/flamegraph", "flamegraph", rpt, errList, config.Labels, webArgs{ | ||
| FlameGraph: template.JS(b), | ||
| }) | ||
| } |
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| @@ -0,0 +1,27 @@ | ||
| Copyright 2010-2017 Mike Bostock | ||
| All rights reserved. | ||
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| Redistribution and use in source and binary forms, with or without modification, | ||
| are permitted provided that the following conditions are met: | ||
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| * Redistributions of source code must retain the above copyright notice, this | ||
| list of conditions and the following disclaimer. | ||
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| * Redistributions in binary form must reproduce the above copyright notice, | ||
| this list of conditions and the following disclaimer in the documentation | ||
| and/or other materials provided with the distribution. | ||
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| * Neither the name of the author nor the names of contributors may be used to | ||
| endorse or promote products derived from this software without specific prior | ||
| written permission. | ||
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| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | ||
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | ||
| ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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