Paul Duffin | 7fc0b45 | 2015-11-10 17:45:15 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2009 Google Inc. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.google.caliper; |
| 18 | |
| 19 | import com.google.caliper.UserException.ExceptionFromUserCodeException; |
| 20 | import com.google.common.collect.ImmutableMap; |
| 21 | import com.google.common.collect.ImmutableSet; |
| 22 | |
| 23 | import java.lang.reflect.InvocationTargetException; |
| 24 | import java.lang.reflect.Method; |
| 25 | import java.lang.reflect.Modifier; |
| 26 | import java.util.Arrays; |
| 27 | import java.util.LinkedHashMap; |
| 28 | import java.util.Map; |
| 29 | import java.util.Set; |
| 30 | |
| 31 | /** |
| 32 | * A convenience class for implementing benchmarks in plain code. |
| 33 | * Implementing classes must have a no-arguments constructor. |
| 34 | * |
| 35 | * <h3>Benchmarks</h3> |
| 36 | * The benchmarks of a suite are defined by . They may be |
| 37 | * static. They are not permitted to take parameters . . .. |
| 38 | * |
| 39 | * <h3>Parameters</h3> |
| 40 | * See the {@link Param} documentation to learn about parameters. |
| 41 | */ |
| 42 | public abstract class SimpleBenchmark |
| 43 | implements Benchmark { |
| 44 | private static final Class<?>[] ARGUMENT_TYPES = { int.class }; |
| 45 | |
| 46 | private final Map<String, Parameter<?>> parameters; |
| 47 | private final Map<String, Method> methods; |
| 48 | |
| 49 | protected SimpleBenchmark() { |
| 50 | parameters = Parameter.forClass(getClass()); |
| 51 | methods = createTimedMethods(); |
| 52 | |
| 53 | if (methods.isEmpty()) { |
| 54 | throw new ConfigurationException( |
| 55 | "No benchmarks defined in " + getClass().getName()); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | protected void setUp() throws Exception {} |
| 60 | |
| 61 | protected void tearDown() throws Exception {} |
| 62 | |
| 63 | @Override public Set<String> parameterNames() { |
| 64 | return ImmutableSet.<String>builder() |
| 65 | .add("benchmark") |
| 66 | .addAll(parameters.keySet()) |
| 67 | .build(); |
| 68 | } |
| 69 | |
| 70 | @Override public Set<String> parameterValues(String parameterName) { |
| 71 | if ("benchmark".equals(parameterName)) { |
| 72 | return methods.keySet(); |
| 73 | } |
| 74 | |
| 75 | Parameter<?> parameter = parameters.get(parameterName); |
| 76 | if (parameter == null) { |
| 77 | throw new IllegalArgumentException(); |
| 78 | } |
| 79 | try { |
| 80 | Iterable<?> values = parameter.values(); |
| 81 | |
| 82 | ImmutableSet.Builder<String> result = ImmutableSet.builder(); |
| 83 | for (Object value : values) { |
| 84 | result.add(String.valueOf(value)); |
| 85 | } |
| 86 | return result.build(); |
| 87 | } catch (Exception e) { |
| 88 | throw new ExceptionFromUserCodeException(e); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | @Override public ConfiguredBenchmark createBenchmark(Map<String, String> parameterValues) { |
| 93 | if (!parameterNames().equals(parameterValues.keySet())) { |
| 94 | throw new IllegalArgumentException("Invalid parameters specified. Expected " |
| 95 | + parameterNames() + " but was " + parameterValues.keySet()); |
| 96 | } |
| 97 | |
| 98 | String methodName = parameterValues.get("benchmark"); |
| 99 | final Method method = methods.get(methodName); |
| 100 | if (method == null) { |
| 101 | throw new IllegalArgumentException("Invalid parameters specified. \"time" + methodName + "\" " |
| 102 | + "is not a method of this benchmark."); |
| 103 | } |
| 104 | |
| 105 | try { |
| 106 | @SuppressWarnings({"ClassNewInstance"}) // can throw any Exception, so we catch all Exceptions |
| 107 | final SimpleBenchmark copyOfSelf = getClass().newInstance(); |
| 108 | |
| 109 | for (Map.Entry<String, String> entry : parameterValues.entrySet()) { |
| 110 | String parameterName = entry.getKey(); |
| 111 | if ("benchmark".equals(parameterName)) { |
| 112 | continue; |
| 113 | } |
| 114 | |
| 115 | Parameter<?> parameter = parameters.get(parameterName); |
| 116 | Object value = TypeConverter.fromString(entry.getValue(), parameter.getType()); |
| 117 | parameter.set(copyOfSelf, value); |
| 118 | } |
| 119 | copyOfSelf.setUp(); |
| 120 | |
| 121 | return new ConfiguredBenchmark(copyOfSelf) { |
| 122 | @Override public Object run(int reps) throws Exception { |
| 123 | try { |
| 124 | return method.invoke(copyOfSelf, reps); |
| 125 | } catch (InvocationTargetException e) { |
| 126 | Throwable cause = e.getCause(); |
| 127 | if (cause instanceof Exception) { |
| 128 | throw (Exception) cause; |
| 129 | } else if (cause instanceof Error) { |
| 130 | throw (Error) cause; |
| 131 | } else { |
| 132 | throw e; |
| 133 | } |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | @Override public void close() throws Exception { |
| 138 | copyOfSelf.tearDown(); |
| 139 | } |
| 140 | }; |
| 141 | } catch (Exception e) { |
| 142 | throw new ExceptionFromUserCodeException(e); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | public Scenario normalizeScenario(Scenario scenario) { |
| 147 | Map<String, String> variables = |
| 148 | new LinkedHashMap<String, String>(scenario.getVariables()); |
| 149 | // Make sure the scenario contains method names without the prefixed "time". If |
| 150 | // it has "time" prefixed, then remove it. Also check whether the user has |
| 151 | // accidentally put a lower cased letter first, and fix it if necessary. |
| 152 | String benchmark = variables.get("benchmark"); |
| 153 | Map<String, Method> timedMethods = createTimedMethods(); |
| 154 | if (timedMethods.get(benchmark) == null) { |
| 155 | // try to upper case first character |
| 156 | char[] benchmarkChars = benchmark.toCharArray(); |
| 157 | benchmarkChars[0] = Character.toUpperCase(benchmarkChars[0]); |
| 158 | String upperCasedBenchmark = String.valueOf(benchmarkChars); |
| 159 | if (timedMethods.get(upperCasedBenchmark) != null) { |
| 160 | variables.put("benchmark", upperCasedBenchmark); |
| 161 | } else if (benchmark.startsWith("time")) { |
| 162 | variables.put("benchmark", benchmark.substring(4)); |
| 163 | } |
| 164 | } |
| 165 | return new Scenario(variables); |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Returns a spec for each benchmark defined in the specified class. The |
| 170 | * returned specs have no parameter values; those must be added separately. |
| 171 | */ |
| 172 | private Map<String, Method> createTimedMethods() { |
| 173 | ImmutableMap.Builder<String, Method> result = ImmutableMap.builder(); |
| 174 | for (Method method : getClass().getDeclaredMethods()) { |
| 175 | int modifiers = method.getModifiers(); |
| 176 | if (!method.getName().startsWith("time")) { |
| 177 | continue; |
| 178 | } |
| 179 | |
| 180 | if (!Modifier.isPublic(modifiers) |
| 181 | || Modifier.isStatic(modifiers) |
| 182 | || Modifier.isAbstract(modifiers) |
| 183 | || !Arrays.equals(method.getParameterTypes(), ARGUMENT_TYPES)) { |
| 184 | throw new ConfigurationException("Timed methods must be public, " |
| 185 | + "non-static, non-abstract and take a single int parameter. " |
| 186 | + "But " + method + " violates these requirements."); |
| 187 | } |
| 188 | |
| 189 | result.put(method.getName().substring(4), method); |
| 190 | } |
| 191 | |
| 192 | return result.build(); |
| 193 | } |
| 194 | |
| 195 | @Override public Map<String, Integer> getTimeUnitNames() { |
| 196 | return ImmutableMap.of("ns", 1, |
| 197 | "us", 1000, |
| 198 | "ms", 1000000, |
| 199 | "s", 1000000000); |
| 200 | } |
| 201 | |
| 202 | @Override public double nanosToUnits(double nanos) { |
| 203 | return nanos; |
| 204 | } |
| 205 | |
| 206 | @Override public Map<String, Integer> getInstanceUnitNames() { |
| 207 | return ImmutableMap.of(" instances", 1, |
| 208 | "K instances", 1000, |
| 209 | "M instances", 1000000, |
| 210 | "B instances", 1000000000); |
| 211 | } |
| 212 | |
| 213 | @Override public double instancesToUnits(long instances) { |
| 214 | return instances; |
| 215 | } |
| 216 | |
| 217 | @Override public Map<String, Integer> getMemoryUnitNames() { |
| 218 | return ImmutableMap.of("B", 1, |
| 219 | "KiB", 1024, |
| 220 | "MiB", 1048576, |
| 221 | "GiB", 1073741824); |
| 222 | } |
| 223 | |
| 224 | @Override public double bytesToUnits(long bytes) { |
| 225 | return bytes; |
| 226 | } |
| 227 | } |