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// Copyright 2014 The Bazel Authors. 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.
package com.google.devtools.build.lib.profiler.chart;
import com.google.devtools.build.lib.profiler.ProfileInfo;
import com.google.devtools.build.lib.profiler.ProfileInfo.CriticalPathEntry;
import com.google.devtools.build.lib.profiler.ProfileInfo.Task;
import com.google.devtools.build.lib.profiler.ProfilerTask;
import java.util.EnumSet;
/**
* Implementation of {@link ChartCreator} that creates Gantt Charts that contain
* bars for all tasks in the profile.
*/
public class DetailedChartCreator implements ChartCreator {
/** The data of the profiled build. */
private final ProfileInfo info;
/**
* Creates the chart creator.
*
* @param info the data of the profiled build
*/
public DetailedChartCreator(ProfileInfo info) {
this.info = info;
}
@Override
public Chart create() {
Chart chart = new Chart();
CommonChartCreator.createCommonChartItems(chart, info);
createTypes(chart);
// calculate the critical path
EnumSet<ProfilerTask> typeFilter = EnumSet.noneOf(ProfilerTask.class);
CriticalPathEntry criticalPath = info.getCriticalPath(typeFilter);
info.analyzeCriticalPath(typeFilter, criticalPath);
for (Task task : info.allTasksById) {
String label = task.type.description + ": " + task.getDescription();
ChartBarType type = chart.lookUpType(task.type.description);
long stop = task.startTime + task.duration;
CriticalPathEntry entry = null;
// for top level tasks, check if they are on the critical path
if (task.parentId == 0 && criticalPath != null) {
entry = info.getNextCriticalPathEntryForTask(criticalPath, task);
// find next top-level entry
if (entry != null) {
CriticalPathEntry nextEntry = entry.next;
while (nextEntry != null && nextEntry.task.parentId != 0) {
nextEntry = nextEntry.next;
}
if (nextEntry != null) {
// time is start and not stop as we traverse the critical back backwards
chart.addVerticalLine(task.threadId, nextEntry.task.threadId, task.startTime);
}
}
}
chart.addBar(task.threadId, task.startTime, stop, type, (entry != null), label);
}
return chart;
}
/**
* Creates a {@link ChartBarType} for every known {@link ProfilerTask} and
* adds it to the chart.
*
* @param chart the chart to add the types to
*/
private void createTypes(Chart chart) {
for (ProfilerTask task : ProfilerTask.values()) {
chart.createType(task.description, new Color(task.color));
}
}
}
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