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// Copyright 2015 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.
package com.google.devtools.build.lib.profiler.statistics;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Multimaps;
import com.google.devtools.build.lib.profiler.ProfileInfo;
import com.google.devtools.build.lib.profiler.ProfileInfo.Task;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;
/**
* Computes various statistics for Skylark and built-in function usage and prints it to a given
* {@link PrintStream}.
*/
public final class SkylarkStatistics {
private final ListMultimap<String, Task> userFunctionTasks;
private final ListMultimap<String, Task> builtinFunctionTasks;
private final List<TasksStatistics> userFunctionStats;
private final List<TasksStatistics> builtinFunctionStats;
private long userTotalNanos;
private long builtinTotalNanos;
public SkylarkStatistics(ProfileInfo info) {
userFunctionTasks = info.getSkylarkUserFunctionTasks();
builtinFunctionTasks = info.getSkylarkBuiltinFunctionTasks();
userFunctionStats = new ArrayList<>();
builtinFunctionStats = new ArrayList<>();
computeStatistics();
}
/**
* @return the total time taken by all calls to built-in Skylark functions
*/
public long getBuiltinTotalNanos() {
return builtinTotalNanos;
}
/**
* @return the total time taken by all calls to user-defined Skylark functions
*/
public long getUserTotalNanos() {
return userTotalNanos;
}
/**
* @return a map from user-defined function descriptions of the form file:line#function to all
* corresponding {@link com.google.devtools.build.lib.profiler.ProfileInfo.Task}s.
*/
public ListMultimap<String, Task> getUserFunctionTasks() {
return userFunctionTasks;
}
/**
* @return a map from built-in function descriptions of the form package.class#method to all
* corresponding {@link com.google.devtools.build.lib.profiler.ProfileInfo.Task}s.
*/
public ListMultimap<String, Task> getBuiltinFunctionTasks() {
return builtinFunctionTasks;
}
public List<TasksStatistics> getBuiltinFunctionStats() {
return builtinFunctionStats;
}
public List<TasksStatistics> getUserFunctionStats() {
return userFunctionStats;
}
/**
* For each Skylark function compute a {@link TasksStatistics} object from the execution times of
* all corresponding {@link Task}s from either {@link #userFunctionTasks} or
* {@link #builtinFunctionTasks}. Fills fields {@link #userFunctionStats} and
* {@link #builtinFunctionStats}.
*/
private void computeStatistics() {
userTotalNanos = computeStatistics(userFunctionTasks, userFunctionStats);
builtinTotalNanos = computeStatistics(builtinFunctionTasks, builtinFunctionStats);
}
/**
* For each Skylark function compute a {@link TasksStatistics} object from the execution times of
* all corresponding {@link Task}s and add it to the list.
* @param tasks Map from function name to all corresponding tasks.
* @param stats The list to which {@link TasksStatistics} are to be added.
* @return The sum of the execution times of all {@link Task} values in the map.
*/
private static long computeStatistics(
ListMultimap<String, Task> tasks, List<TasksStatistics> stats) {
long total = 0L;
for (Entry<String, List<Task>> entry : Multimaps.asMap(tasks).entrySet()) {
TasksStatistics functionStats = TasksStatistics.create(entry.getKey(), entry.getValue());
stats.add(functionStats);
total += functionStats.totalNanos;
}
return total;
}
}
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