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Record histogram and other statistics for the ProfileTask objects. In…
… case of recording VFS_ stats we try to catalog the access base on the path type. -- MOS_MIGRATED_REVID=108238357
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src/main/java/com/google/devtools/build/lib/profiler/MetricData.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| // 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; | ||
|
|
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| import com.google.common.base.Joiner; | ||
| import com.google.common.base.Predicate; | ||
| import com.google.common.collect.Collections2; | ||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.Range; | ||
|
|
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| import java.text.DecimalFormat; | ||
|
|
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| /** | ||
| * Metric data for {@code description} object. Contains count, average, standard deviation, max and | ||
| * histogram. | ||
| */ | ||
| public final class MetricData { | ||
|
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| private final Object description; | ||
| private final ImmutableList<HistogramElement> histogram; | ||
| private final int count; | ||
| private final double avg; | ||
| private final double stdDev; | ||
| private final int max; | ||
| private static final Predicate<HistogramElement> NON_EMPTY_HISTOGRAM_ELEMENT = | ||
| new Predicate<HistogramElement>() { | ||
| @Override | ||
| public boolean apply(HistogramElement element) { | ||
| return element.count > 0; | ||
| } | ||
| }; | ||
|
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| public MetricData(Object description, ImmutableList<HistogramElement> histogram, int count, | ||
| double avg, double stdDev, int max) { | ||
| this.description = description; | ||
| this.histogram = histogram; | ||
| this.count = count; | ||
| this.avg = avg; | ||
| this.stdDev = stdDev; | ||
| this.max = max; | ||
| } | ||
|
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| public Object getDescription() { | ||
| return description; | ||
| } | ||
|
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| public ImmutableList<HistogramElement> getHistogram() { | ||
| return histogram; | ||
| } | ||
|
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| public int getCount() { | ||
| return count; | ||
| } | ||
|
|
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| public double getAvg() { | ||
| return avg; | ||
| } | ||
|
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| public double getStdDev() { | ||
| return stdDev; | ||
| } | ||
|
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| public int getMax() { | ||
| return max; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| if (count == 0) { | ||
| return "'" + description + "'. Zero data recorded"; | ||
| } | ||
| DecimalFormat fmt = new DecimalFormat("0.###"); | ||
| return "'" + description + "'. " | ||
| + " Count: " + count | ||
| + " Avg: " + fmt.format(avg) | ||
| + " StdDev: " + fmt.format(stdDev) | ||
| + " Max: " + max | ||
| + " Histogram:\n " | ||
| + Joiner.on("\n ").join(Collections2.filter(histogram, NON_EMPTY_HISTOGRAM_ELEMENT)); | ||
| } | ||
|
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| /** An histogram element that contains the range that applies to and the number of elements. */ | ||
| public static final class HistogramElement { | ||
|
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| private final Range<Integer> range; | ||
| private final int count; | ||
|
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| HistogramElement(Range<Integer> range, int count) { | ||
| this.range = range; | ||
| this.count = count; | ||
| } | ||
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| public Range<Integer> getRange() { | ||
| return range; | ||
| } | ||
|
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| public int getCount() { | ||
| return count; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
|
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| return String.format("%-15s:%10s", | ||
| "[" + range.lowerEndpoint() + ".." + (range.hasUpperBound() | ||
| ? range.upperEndpoint() | ||
| : "\u221e") // infinite symbol | ||
| + " ms]", count); | ||
| } | ||
| } | ||
| } |
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src/main/java/com/google/devtools/build/lib/profiler/PredicateBasedStatRecorder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // 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; | ||
|
|
||
| import com.google.common.base.Predicate; | ||
| import com.google.common.collect.ImmutableList; | ||
|
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| import java.util.List; | ||
|
|
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| /** | ||
| * A stat recorder that is able to look at the kind of object added and delegate to the appropriate | ||
| * {@link StatRecorder} based on a predicate. | ||
| * | ||
| * <p> Note that the predicates are evaluated in order and delegated only to the first one. That | ||
| * means that the most specific and cheapest predicates should be passed first. | ||
| */ | ||
| public class PredicateBasedStatRecorder implements StatRecorder { | ||
|
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| private final Predicate[] predicates; | ||
| private final StatRecorder[] recorders; | ||
|
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| public PredicateBasedStatRecorder(List<RecorderAndPredicate> stats) { | ||
| predicates = new Predicate[stats.size()]; | ||
| recorders = new StatRecorder[stats.size()]; | ||
| for (int i = 0; i < stats.size(); i++) { | ||
| RecorderAndPredicate stat = stats.get(i); | ||
| predicates[i] = stat.predicate; | ||
| recorders[i] = stat.recorder; | ||
| } | ||
| } | ||
|
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| @SuppressWarnings("unchecked") | ||
| @Override | ||
| public void addStat(int duration, Object obj) { | ||
| String description = obj.toString(); | ||
| for (int i = 0; i < predicates.length; i++) { | ||
| if (predicates[i].apply(description)) { | ||
| recorders[i].addStat(duration, obj); | ||
| return; | ||
| } | ||
| } | ||
| } | ||
|
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| @Override | ||
| public boolean isEmpty() { | ||
| for (StatRecorder recorder : recorders) { | ||
| if (!recorder.isEmpty()) { | ||
| return false; | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| StringBuilder sb = new StringBuilder(); | ||
| for (StatRecorder recorder : recorders) { | ||
| if (recorder.isEmpty()) { | ||
| continue; | ||
| } | ||
| sb.append(recorder); | ||
| sb.append("\n"); | ||
| } | ||
| return sb.toString(); | ||
| } | ||
|
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| /** | ||
| * A Wrapper of a {@code StatRecorder} and a {@code Predicate}. Objects that matches the predicate | ||
| * will be delegated to the StatRecorder. | ||
| */ | ||
| public static final class RecorderAndPredicate { | ||
|
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| private final StatRecorder recorder; | ||
| private final Predicate<? super String> predicate; | ||
|
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| public RecorderAndPredicate(StatRecorder recorder, Predicate<? super String> predicate) { | ||
| this.recorder = recorder; | ||
| this.predicate = predicate; | ||
| } | ||
| } | ||
|
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| /** Returns all the delegate stat recorders. */ | ||
| public ImmutableList<StatRecorder> getRecorders() { | ||
| return ImmutableList.<StatRecorder>builder().add(recorders).build(); | ||
| } | ||
| } |
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