/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.mapred.gridmix;
import org.junit.Test;
import static org.junit.Assert.*;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.DummyResourceCalculatorPlugin;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.gridmix.DebugJobProducer.MockJob;
import org.apache.hadoop.mapred.gridmix.TestHighRamJob.DummyGridmixJob;
import org.apache.hadoop.mapred.gridmix.TestResourceUsageEmulators.FakeProgressive;
import org.apache.hadoop.mapred.gridmix.emulators.resourceusage.TotalHeapUsageEmulatorPlugin;
import org.apache.hadoop.mapred.gridmix.emulators.resourceusage.TotalHeapUsageEmulatorPlugin.DefaultHeapUsageEmulator;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.util.ResourceCalculatorPlugin;
import org.apache.hadoop.tools.rumen.ResourceUsageMetrics;
/**
* Test Gridmix memory emulation.
*/
public class TestGridmixMemoryEmulation {
/**
* This is a dummy class that fakes heap usage.
*/
private static class FakeHeapUsageEmulatorCore
extends DefaultHeapUsageEmulator {
private int numCalls = 0;
@Override
public void load(long sizeInMB) {
++numCalls;
super.load(sizeInMB);
}
// Get the total number of times load() was invoked
int getNumCalls() {
return numCalls;
}
// Get the total number of 1mb objects stored within
long getHeapUsageInMB() {
return heapSpace.size();
}
@Override
public void reset() {
// no op to stop emulate() from resetting
}
/**
* For re-testing purpose.
*/
void resetFake() {
numCalls = 0;
super.reset();
}
}
/**
* This is a dummy class that fakes the heap usage emulator plugin.
*/
private static class FakeHeapUsageEmulatorPlugin
extends TotalHeapUsageEmulatorPlugin {
private FakeHeapUsageEmulatorCore core;
public FakeHeapUsageEmulatorPlugin(FakeHeapUsageEmulatorCore core) {
super(core);
this.core = core;
}
@Override
protected long getMaxHeapUsageInMB() {
return Long.MAX_VALUE / ONE_MB;
}
@Override
protected long getTotalHeapUsageInMB() {
return core.getHeapUsageInMB();
}
}
/**
* Test {@link TotalHeapUsageEmulatorPlugin}'s core heap usage emulation
* engine.
*/
@Test
public void testHeapUsageEmulator() throws IOException {
FakeHeapUsageEmulatorCore heapEmulator = new FakeHeapUsageEmulatorCore();
long testSizeInMB = 10; // 10 mb
long previousHeap = heapEmulator.getHeapUsageInMB();
heapEmulator.load(testSizeInMB);
long currentHeap = heapEmulator.getHeapUsageInMB();
// check if the heap has increased by expected value
assertEquals("Default heap emulator failed to load 10mb",
previousHeap + testSizeInMB, currentHeap);
// test reset
heapEmulator.resetFake();
assertEquals("Default heap emulator failed to reset",
0, heapEmulator.getHeapUsageInMB());
}
/**
* Test {@link TotalHeapUsageEmulatorPlugin}.
*/
@Test
public void testTotalHeapUsageEmulatorPlugin() throws Exception {
Configuration conf = new Configuration();
// set the dummy resource calculator for testing
ResourceCalculatorPlugin monitor = new DummyResourceCalculatorPlugin();
long maxHeapUsage = 1024 * TotalHeapUsageEmulatorPlugin.ONE_MB; // 1GB
conf.setLong(DummyResourceCalculatorPlugin.MAXPMEM_TESTING_PROPERTY,
maxHeapUsage);
monitor.setConf(conf);
// no buffer to be reserved
conf.setFloat(TotalHeapUsageEmulatorPlugin.MIN_HEAP_FREE_RATIO, 0F);
// only 1 call to be made per cycle
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_LOAD_RATIO, 1F);
long targetHeapUsageInMB = 200; // 200mb
// fake progress indicator
FakeProgressive fakeProgress = new FakeProgressive();
// fake heap usage generator
FakeHeapUsageEmulatorCore fakeCore = new FakeHeapUsageEmulatorCore();
// a heap usage emulator with fake core
FakeHeapUsageEmulatorPlugin heapPlugin =
new FakeHeapUsageEmulatorPlugin(fakeCore);
// test with invalid or missing resource usage value
ResourceUsageMetrics invalidUsage =
TestResourceUsageEmulators.createMetrics(0);
heapPlugin.initialize(conf, invalidUsage, null, null);
// test if disabled heap emulation plugin's emulate() call is a no-operation
// this will test if the emulation plugin is disabled or not
int numCallsPre = fakeCore.getNumCalls();
long heapUsagePre = fakeCore.getHeapUsageInMB();
heapPlugin.emulate();
int numCallsPost = fakeCore.getNumCalls();
long heapUsagePost = fakeCore.getHeapUsageInMB();
// test if no calls are made heap usage emulator core
assertEquals("Disabled heap usage emulation plugin works!",
numCallsPre, numCallsPost);
// test if no calls are made heap usage emulator core
assertEquals("Disabled heap usage emulation plugin works!",
heapUsagePre, heapUsagePost);
// test with wrong/invalid configuration
Boolean failed = null;
invalidUsage =
TestResourceUsageEmulators.createMetrics(maxHeapUsage
+ TotalHeapUsageEmulatorPlugin.ONE_MB);
try {
heapPlugin.initialize(conf, invalidUsage, monitor, null);
failed = false;
} catch (Exception e) {
failed = true;
}
assertNotNull("Fail case failure!", failed);
assertTrue("Expected failure!", failed);
// test with valid resource usage value
ResourceUsageMetrics metrics =
TestResourceUsageEmulators.createMetrics(targetHeapUsageInMB
* TotalHeapUsageEmulatorPlugin.ONE_MB);
// test with default emulation interval
// in every interval, the emulator will add 100% of the expected usage
// (since gridmix.emulators.resource-usage.heap.load-ratio=1)
// so at 10%, emulator will add 10% (difference), at 20% it will add 10% ...
// So to emulate 200MB, it will add
// 20mb + 20mb + 20mb + 20mb + .. = 200mb
testEmulationAccuracy(conf, fakeCore, monitor, metrics, heapPlugin, 200,
10);
// test with custom value for emulation interval of 20%
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_EMULATION_PROGRESS_INTERVAL,
0.2F);
// 40mb + 40mb + 40mb + 40mb + 40mb = 200mb
testEmulationAccuracy(conf, fakeCore, monitor, metrics, heapPlugin, 200, 5);
// test with custom value of free heap ratio and load ratio = 1
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_LOAD_RATIO, 1F);
conf.setFloat(TotalHeapUsageEmulatorPlugin.MIN_HEAP_FREE_RATIO, 0.5F);
// 40mb + 0mb + 80mb + 0mb + 0mb = 120mb
testEmulationAccuracy(conf, fakeCore, monitor, metrics, heapPlugin, 120, 2);
// test with custom value of heap load ratio and min free heap ratio = 0
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_LOAD_RATIO, 0.5F);
conf.setFloat(TotalHeapUsageEmulatorPlugin.MIN_HEAP_FREE_RATIO, 0F);
// 20mb (call#1) + 20mb (call#1) + 20mb (call#2) + 20mb (call#2) +.. = 200mb
testEmulationAccuracy(conf, fakeCore, monitor, metrics, heapPlugin, 200,
10);
// test with custom value of free heap ratio = 0.3 and load ratio = 0.5
conf.setFloat(TotalHeapUsageEmulatorPlugin.MIN_HEAP_FREE_RATIO, 0.25F);
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_LOAD_RATIO, 0.5F);
// 20mb (call#1) + 20mb (call#1) + 30mb (call#2) + 0mb (call#2)
// + 30mb (call#3) + 0mb (call#3) + 35mb (call#4) + 0mb (call#4)
// + 37mb (call#5) + 0mb (call#5) = 162mb
testEmulationAccuracy(conf, fakeCore, monitor, metrics, heapPlugin, 162, 6);
// test if emulation interval boundary is respected
fakeProgress = new FakeProgressive(); // initialize
conf.setFloat(TotalHeapUsageEmulatorPlugin.MIN_HEAP_FREE_RATIO, 0F);
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_LOAD_RATIO, 1F);
conf.setFloat(TotalHeapUsageEmulatorPlugin.HEAP_EMULATION_PROGRESS_INTERVAL,
0.25F);
heapPlugin.initialize(conf, metrics, monitor, fakeProgress);
fakeCore.resetFake();
// take a snapshot after the initialization
long initHeapUsage = fakeCore.getHeapUsageInMB();
long initNumCallsUsage = fakeCore.getNumCalls();
// test with 0 progress
testEmulationBoundary(0F, fakeCore, fakeProgress, heapPlugin, initHeapUsage,
initNumCallsUsage, "[no-op, 0 progress]");
// test with 24% progress
testEmulationBoundary(0.24F, fakeCore, fakeProgress, heapPlugin,
initHeapUsage, initNumCallsUsage,
"[no-op, 24% progress]");
// test with 25% progress
testEmulationBoundary(0.25F, fakeCore, fakeProgress, heapPlugin,
targetHeapUsageInMB / 4, 1, "[op, 25% progress]");
// test with 80% progress
testEmulationBoundary(0.80F, fakeCore, fakeProgress, heapPlugin,
(targetHeapUsageInMB * 4) / 5, 2, "[op, 80% progress]");
// now test if the final call with 100% progress ramps up the heap usage
testEmulationBoundary(1F, fakeCore, fakeProgress, heapPlugin,
targetHeapUsageInMB, 3, "[op, 100% progress]");
}
// test whether the heap usage emulator achieves the desired target using
// desired calls to the underling core engine.
private static void testEmulationAccuracy(Configuration conf,
FakeHeapUsageEmulatorCore fakeCore,
ResourceCalculatorPlugin monitor,
ResourceUsageMetrics metrics,
TotalHeapUsageEmulatorPlugin heapPlugin,
long expectedTotalHeapUsageInMB,
long expectedTotalNumCalls)
throws Exception {
FakeProgressive fakeProgress = new FakeProgressive();
fakeCore.resetFake();
heapPlugin.initialize(conf, metrics, monitor, fakeProgress);
int numLoops = 0;
while (fakeProgress.getProgress() < 1) {
++numLoops;
float progress = numLoops / 100.0F;
fakeProgress.setProgress(progress);
heapPlugin.emulate();
}
// test if the resource plugin shows the expected usage
assertEquals("Cumulative heap usage emulator plugin failed (total usage)!",
expectedTotalHeapUsageInMB, fakeCore.getHeapUsageInMB(), 1L);
// test if the resource plugin shows the expected num calls
assertEquals("Cumulative heap usage emulator plugin failed (num calls)!",
expectedTotalNumCalls, fakeCore.getNumCalls(), 0L);
}
// tests if the heap usage emulation plugin emulates only at the expected
// progress gaps
private static void testEmulationBoundary(float progress,
FakeHeapUsageEmulatorCore fakeCore, FakeProgressive fakeProgress,
TotalHeapUsageEmulatorPlugin heapPlugin, long expectedTotalHeapUsageInMB,
long expectedTotalNumCalls, String info) throws Exception {
fakeProgress.setProgress(progress);
heapPlugin.emulate();
// test heap usage
assertEquals("Emulation interval test for heap usage failed " + info + "!",
expectedTotalHeapUsageInMB, fakeCore.getHeapUsageInMB(), 0L);
// test num calls
assertEquals("Emulation interval test for heap usage failed " + info + "!",
expectedTotalNumCalls, fakeCore.getNumCalls(), 0L);
}
/**
* Test the specified task java heap options.
*/
@SuppressWarnings("deprecation")
private void testJavaHeapOptions(String mapOptions,
String reduceOptions, String taskOptions, String defaultMapOptions,
String defaultReduceOptions, String defaultTaskOptions,
String expectedMapOptions, String expectedReduceOptions,
String expectedTaskOptions) throws Exception {
Configuration simulatedConf = new Configuration(false);
// // reset the configuration parameters
// simulatedConf.set(JobConf.MAPRED_MAP_TASK_JAVA_OPTS, "");
// simulatedConf.set(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS, "");
// simulatedConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, "");
// set the default map task options
if (defaultMapOptions != null) {
simulatedConf.set(JobConf.MAPRED_MAP_TASK_JAVA_OPTS, defaultMapOptions);
}
// set the default reduce task options
if (defaultReduceOptions != null) {
simulatedConf.set(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS,
defaultReduceOptions);
}
// set the default task options
if (defaultTaskOptions != null) {
simulatedConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, defaultTaskOptions);
}
Configuration originalConf = new Configuration(false);
// // reset the configuration parameters
// originalConf.set(JobConf.MAPRED_MAP_TASK_JAVA_OPTS, "");
// originalConf.set(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS, "");
// originalConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, "");
// set the map task options
if (mapOptions != null) {
originalConf.set(JobConf.MAPRED_MAP_TASK_JAVA_OPTS, mapOptions);
}
// set the reduce task options
if (reduceOptions != null) {
originalConf.set(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS, reduceOptions);
}
// set the task options
if (taskOptions != null) {
originalConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, taskOptions);
}
// configure the task jvm's heap options
GridmixJob.configureTaskJVMOptions(originalConf, simulatedConf);
assertEquals("Map heap options mismatch!", expectedMapOptions,
simulatedConf.get(JobConf.MAPRED_MAP_TASK_JAVA_OPTS));
assertEquals("Reduce heap options mismatch!", expectedReduceOptions,
simulatedConf.get(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS));
assertEquals("Task heap options mismatch!", expectedTaskOptions,
simulatedConf.get(JobConf.MAPRED_TASK_JAVA_OPTS));
}
/**
* Test task-level java heap options configuration in {@link GridmixJob}.
*/
@Test
public void testJavaHeapOptions() throws Exception {
// test missing opts
testJavaHeapOptions(null, null, null, null, null, null, null, null,
null);
// test original heap opts and missing default opts
testJavaHeapOptions("-Xms10m", "-Xms20m", "-Xms30m", null, null, null,
null, null, null);
// test missing opts with default opts
testJavaHeapOptions(null, null, null, "-Xms10m", "-Xms20m", "-Xms30m",
"-Xms10m", "-Xms20m", "-Xms30m");
// test empty option
testJavaHeapOptions("", "", "", null, null, null, null, null, null);
// test empty default option and no original heap options
testJavaHeapOptions(null, null, null, "", "", "", "", "", "");
// test empty opts and default opts
testJavaHeapOptions("", "", "", "-Xmx10m -Xms1m", "-Xmx50m -Xms2m",
"-Xms2m -Xmx100m", "-Xmx10m -Xms1m", "-Xmx50m -Xms2m",
"-Xms2m -Xmx100m");
// test custom heap opts with no default opts
testJavaHeapOptions("-Xmx10m", "-Xmx20m", "-Xmx30m", null, null, null,
"-Xmx10m", "-Xmx20m", "-Xmx30m");
// test heap opts with default opts (multiple value)
testJavaHeapOptions("-Xms5m -Xmx200m", "-Xms15m -Xmx300m",
"-Xms25m -Xmx50m", "-XXabc", "-XXxyz", "-XXdef",
"-XXabc -Xmx200m", "-XXxyz -Xmx300m", "-XXdef -Xmx50m");
// test heap opts with default opts (duplication of -Xmx)
testJavaHeapOptions("-Xms5m -Xmx200m", "-Xms15m -Xmx300m",
"-Xms25m -Xmx50m", "-XXabc -Xmx500m", "-XXxyz -Xmx600m",
"-XXdef -Xmx700m", "-XXabc -Xmx200m", "-XXxyz -Xmx300m",
"-XXdef -Xmx50m");
// test heap opts with default opts (single value)
testJavaHeapOptions("-Xmx10m", "-Xmx20m", "-Xmx50m", "-Xms2m",
"-Xms3m", "-Xms5m", "-Xms2m -Xmx10m", "-Xms3m -Xmx20m",
"-Xms5m -Xmx50m");
// test heap opts with default opts (duplication of -Xmx)
testJavaHeapOptions("-Xmx10m", "-Xmx20m", "-Xmx50m", "-Xmx2m",
"-Xmx3m", "-Xmx5m", "-Xmx10m", "-Xmx20m", "-Xmx50m");
}
/**
* Test disabled task heap options configuration in {@link GridmixJob}.
*/
@Test
@SuppressWarnings("deprecation")
public void testJavaHeapOptionsDisabled() throws Exception {
Configuration gridmixConf = new Configuration();
gridmixConf.setBoolean(GridmixJob.GRIDMIX_TASK_JVM_OPTIONS_ENABLE, false);
// set the default values of simulated job
gridmixConf.set(JobConf.MAPRED_MAP_TASK_JAVA_OPTS, "-Xmx1m");
gridmixConf.set(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS, "-Xmx2m");
gridmixConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, "-Xmx3m");
// set the default map and reduce task options for original job
final JobConf originalConf = new JobConf();
originalConf.set(JobConf.MAPRED_MAP_TASK_JAVA_OPTS, "-Xmx10m");
originalConf.set(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS, "-Xmx20m");
originalConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, "-Xmx30m");
// define a mock job
MockJob story = new MockJob(originalConf) {
public JobConf getJobConf() {
return originalConf;
}
};
GridmixJob job = new DummyGridmixJob(gridmixConf, story);
Job simulatedJob = job.getJob();
Configuration simulatedConf = simulatedJob.getConfiguration();
assertEquals("Map heap options works when disabled!", "-Xmx1m",
simulatedConf.get(JobConf.MAPRED_MAP_TASK_JAVA_OPTS));
assertEquals("Reduce heap options works when disabled!", "-Xmx2m",
simulatedConf.get(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS));
assertEquals("Task heap options works when disabled!", "-Xmx3m",
simulatedConf.get(JobConf.MAPRED_TASK_JAVA_OPTS));
}
}