MAPREDUCE-2107. [Gridmix] Total heap usage emulation in Gridmix. (Amar Kamat and Ravi Gummadi via amarrk)
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1136000 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Amar Kamat
parent
c33c7fab2c
commit
a732ab3804
|
|
@ -11,6 +11,9 @@ Trunk (unreleased changes)
|
|||
|
||||
NEW FEATURES
|
||||
|
||||
MAPREDUCE-2107. [Gridmix] Total heap usage emulation in Gridmix.
|
||||
(Amar Kamat and Ravi Gummadi via amarrk)
|
||||
|
||||
MAPREDUCE-2106. [Gridmix] Cumulative CPU usage emulation in Gridmix.
|
||||
(amarrk)
|
||||
|
||||
|
|
|
|||
|
|
@ -19,12 +19,15 @@ package org.apache.hadoop.mapred.gridmix;
|
|||
|
||||
import java.io.DataOutputStream;
|
||||
import java.io.IOException;
|
||||
import java.util.ArrayList;
|
||||
import java.util.Formatter;
|
||||
import java.util.List;
|
||||
import java.util.concurrent.Callable;
|
||||
import java.util.concurrent.ConcurrentHashMap;
|
||||
import java.util.concurrent.Delayed;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
import java.util.regex.Matcher;
|
||||
import java.util.regex.Pattern;
|
||||
import java.security.PrivilegedExceptionAction;
|
||||
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
|
|
@ -86,6 +89,11 @@ abstract class GridmixJob implements Callable<Job>, Delayed {
|
|||
// configuration key to enable/disable High-Ram feature emulation
|
||||
static final String GRIDMIX_HIGHRAM_EMULATION_ENABLE =
|
||||
"gridmix.highram-emulation.enable";
|
||||
// configuration key to enable/disable task jvm options
|
||||
static final String GRIDMIX_TASK_JVM_OPTIONS_ENABLE =
|
||||
"gridmix.task.jvm-options.enable";
|
||||
private static final Pattern maxHeapPattern =
|
||||
Pattern.compile("-Xmx[0-9]+[kKmMgGtT]?+");
|
||||
|
||||
private static void setJobQueue(Job job, String queue) {
|
||||
if (queue != null) {
|
||||
|
|
@ -137,6 +145,19 @@ abstract class GridmixJob implements Callable<Job>, Delayed {
|
|||
ret.getConfiguration());
|
||||
}
|
||||
|
||||
// configure task jvm options if enabled
|
||||
// this knob can be turned off if there is a mismatch between the
|
||||
// target (simulation) cluster and the original cluster. Such a
|
||||
// mismatch can result in job failures (due to memory issues) on the
|
||||
// target (simulated) cluster.
|
||||
//
|
||||
// TODO If configured, scale the original task's JVM (heap related)
|
||||
// options to suit the target (simulation) cluster
|
||||
if (conf.getBoolean(GRIDMIX_TASK_JVM_OPTIONS_ENABLE, true)) {
|
||||
configureTaskJVMOptions(jobdesc.getJobConf(),
|
||||
ret.getConfiguration());
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
});
|
||||
|
|
@ -149,6 +170,74 @@ abstract class GridmixJob implements Callable<Job>, Delayed {
|
|||
outdir = new Path(outRoot, "" + seq);
|
||||
}
|
||||
|
||||
@SuppressWarnings("deprecation")
|
||||
protected static void configureTaskJVMOptions(Configuration originalJobConf,
|
||||
Configuration simulatedJobConf){
|
||||
// Get the heap related java opts used for the original job and set the
|
||||
// same for the simulated job.
|
||||
// set task task heap options
|
||||
configureTaskJVMMaxHeapOptions(originalJobConf, simulatedJobConf,
|
||||
JobConf.MAPRED_TASK_JAVA_OPTS);
|
||||
// set map task heap options
|
||||
configureTaskJVMMaxHeapOptions(originalJobConf, simulatedJobConf,
|
||||
MRJobConfig.MAP_JAVA_OPTS);
|
||||
|
||||
// set reduce task heap options
|
||||
configureTaskJVMMaxHeapOptions(originalJobConf, simulatedJobConf,
|
||||
MRJobConfig.REDUCE_JAVA_OPTS);
|
||||
}
|
||||
|
||||
// Configures the task's max heap options using the specified key
|
||||
private static void configureTaskJVMMaxHeapOptions(Configuration srcConf,
|
||||
Configuration destConf,
|
||||
String key) {
|
||||
String srcHeapOpts = srcConf.get(key);
|
||||
if (srcHeapOpts != null) {
|
||||
List<String> srcMaxOptsList = new ArrayList<String>();
|
||||
// extract the max heap options and ignore the rest
|
||||
extractMaxHeapOpts(srcHeapOpts, srcMaxOptsList,
|
||||
new ArrayList<String>());
|
||||
if (srcMaxOptsList.size() > 0) {
|
||||
List<String> destOtherOptsList = new ArrayList<String>();
|
||||
// extract the other heap options and ignore the max options in the
|
||||
// destination configuration
|
||||
String destHeapOpts = destConf.get(key);
|
||||
if (destHeapOpts != null) {
|
||||
extractMaxHeapOpts(destHeapOpts, new ArrayList<String>(),
|
||||
destOtherOptsList);
|
||||
}
|
||||
|
||||
// the source configuration might have some task level max heap opts set
|
||||
// remove these opts from the destination configuration and replace
|
||||
// with the options set in the original configuration
|
||||
StringBuilder newHeapOpts = new StringBuilder();
|
||||
|
||||
for (String otherOpt : destOtherOptsList) {
|
||||
newHeapOpts.append(otherOpt).append(" ");
|
||||
}
|
||||
|
||||
for (String opts : srcMaxOptsList) {
|
||||
newHeapOpts.append(opts).append(" ");
|
||||
}
|
||||
|
||||
// set the final heap opts
|
||||
destConf.set(key, newHeapOpts.toString().trim());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private static void extractMaxHeapOpts(String javaOptions,
|
||||
List<String> maxOpts, List<String> others) {
|
||||
for (String opt : javaOptions.split(" ")) {
|
||||
Matcher matcher = maxHeapPattern.matcher(opt);
|
||||
if (matcher.find()) {
|
||||
maxOpts.add(opt);
|
||||
} else {
|
||||
others.add(opt);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Scales the desired job-level configuration parameter. This API makes sure
|
||||
// that the ratio of the job level configuration parameter to the cluster
|
||||
// level configuration parameter is maintained in the simulated run. Hence
|
||||
|
|
|
|||
|
|
@ -34,7 +34,7 @@ import org.apache.hadoop.tools.rumen.ResourceUsageMetrics;
|
|||
*
|
||||
* <p>{@link CumulativeCpuUsageEmulatorPlugin} emulates the CPU usage in steps.
|
||||
* The frequency of emulation can be configured via
|
||||
* {@link #CPU_EMULATION_FREQUENCY}.
|
||||
* {@link #CPU_EMULATION_PROGRESS_INTERVAL}.
|
||||
* CPU usage values are matched via emulation only on the interval boundaries.
|
||||
* </p>
|
||||
*
|
||||
|
|
@ -70,8 +70,8 @@ implements ResourceUsageEmulatorPlugin {
|
|||
private long lastSeenCpuUsageCpuUsage = 0;
|
||||
|
||||
// Configuration parameters
|
||||
public static final String CPU_EMULATION_FREQUENCY =
|
||||
"gridmix.emulators.resource-usage.cpu.frequency";
|
||||
public static final String CPU_EMULATION_PROGRESS_INTERVAL =
|
||||
"gridmix.emulators.resource-usage.cpu.emulation-interval";
|
||||
private static final float DEFAULT_EMULATION_FREQUENCY = 0.1F; // 10 times
|
||||
|
||||
/**
|
||||
|
|
@ -302,7 +302,7 @@ implements ResourceUsageEmulatorPlugin {
|
|||
|
||||
this.monitor = monitor;
|
||||
this.progress = progress;
|
||||
emulationInterval = conf.getFloat(CPU_EMULATION_FREQUENCY,
|
||||
emulationInterval = conf.getFloat(CPU_EMULATION_PROGRESS_INTERVAL,
|
||||
DEFAULT_EMULATION_FREQUENCY);
|
||||
|
||||
// calibrate the core cpu-usage utility
|
||||
|
|
|
|||
|
|
@ -0,0 +1,258 @@
|
|||
/**
|
||||
* 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.emulators.resourceusage;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.util.ArrayList;
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.mapred.gridmix.Progressive;
|
||||
import org.apache.hadoop.mapreduce.util.ResourceCalculatorPlugin;
|
||||
import org.apache.hadoop.tools.rumen.ResourceUsageMetrics;
|
||||
|
||||
/**
|
||||
* <p>A {@link ResourceUsageEmulatorPlugin} that emulates the total heap
|
||||
* usage by loading the JVM heap memory. Adding smaller chunks of data to the
|
||||
* heap will essentially use up some heap space thus forcing the JVM to expand
|
||||
* its heap and thus resulting into increase in the heap usage.</p>
|
||||
*
|
||||
* <p>{@link TotalHeapUsageEmulatorPlugin} emulates the heap usage in steps.
|
||||
* The frequency of emulation can be configured via
|
||||
* {@link #HEAP_EMULATION_PROGRESS_INTERVAL}.
|
||||
* Heap usage values are matched via emulation only at specific interval
|
||||
* boundaries.
|
||||
* </p>
|
||||
*
|
||||
* {@link TotalHeapUsageEmulatorPlugin} is a wrapper program for managing
|
||||
* the heap usage emulation feature. It internally uses an emulation algorithm
|
||||
* (called as core and described using {@link HeapUsageEmulatorCore}) for
|
||||
* performing the actual emulation. Multiple calls to this core engine should
|
||||
* use up some amount of heap.
|
||||
*/
|
||||
public class TotalHeapUsageEmulatorPlugin
|
||||
implements ResourceUsageEmulatorPlugin {
|
||||
// Configuration parameters
|
||||
// the core engine to emulate heap usage
|
||||
protected HeapUsageEmulatorCore emulatorCore;
|
||||
// the progress bar
|
||||
private Progressive progress;
|
||||
// decides if this plugin can emulate heap usage or not
|
||||
private boolean enabled = true;
|
||||
// the progress boundaries/interval where emulation should be done
|
||||
private float emulationInterval;
|
||||
// target heap usage to emulate
|
||||
private long targetHeapUsageInMB = 0;
|
||||
|
||||
/**
|
||||
* The frequency (based on task progress) with which memory-emulation code is
|
||||
* run. If the value is set to 0.1 then the emulation will happen at 10% of
|
||||
* the task's progress. The default value of this parameter is
|
||||
* {@link #DEFAULT_EMULATION_PROGRESS_INTERVAL}.
|
||||
*/
|
||||
public static final String HEAP_EMULATION_PROGRESS_INTERVAL =
|
||||
"gridmix.emulators.resource-usage.heap.emulation-interval";
|
||||
|
||||
// Default value for emulation interval
|
||||
private static final float DEFAULT_EMULATION_PROGRESS_INTERVAL = 0.1F; // 10 %
|
||||
|
||||
private float prevEmulationProgress = 0F;
|
||||
|
||||
/**
|
||||
* The minimum buffer reserved for other non-emulation activities.
|
||||
*/
|
||||
public static final String MIN_HEAP_FREE_RATIO =
|
||||
"gridmix.emulators.resource-usage.heap.min-free-ratio";
|
||||
|
||||
private float minFreeHeapRatio;
|
||||
|
||||
private static final float DEFAULT_MIN_FREE_HEAP_RATIO = 0.3F;
|
||||
|
||||
/**
|
||||
* Determines the unit increase per call to the core engine's load API. This
|
||||
* is expressed as a percentage of the difference between the expected total
|
||||
* heap usage and the current usage.
|
||||
*/
|
||||
public static final String HEAP_LOAD_RATIO =
|
||||
"gridmix.emulators.resource-usage.heap.load-ratio";
|
||||
|
||||
private float heapLoadRatio;
|
||||
|
||||
private static final float DEFAULT_HEAP_LOAD_RATIO = 0.1F;
|
||||
|
||||
public static int ONE_MB = 1024 * 1024;
|
||||
|
||||
/**
|
||||
* Defines the core heap usage emulation algorithm. This engine is expected
|
||||
* to perform certain memory intensive operations to consume some
|
||||
* amount of heap. {@link #load(long)} should load the current heap and
|
||||
* increase the heap usage by the specified value. This core engine can be
|
||||
* initialized using the {@link #initialize(ResourceCalculatorPlugin, long)}
|
||||
* API to suit the underlying hardware better.
|
||||
*/
|
||||
public interface HeapUsageEmulatorCore {
|
||||
/**
|
||||
* Performs some memory intensive operations to use up some heap.
|
||||
*/
|
||||
public void load(long sizeInMB);
|
||||
|
||||
/**
|
||||
* Initialize the core.
|
||||
*/
|
||||
public void initialize(ResourceCalculatorPlugin monitor,
|
||||
long totalHeapUsageInMB);
|
||||
|
||||
/**
|
||||
* Reset the resource usage
|
||||
*/
|
||||
public void reset();
|
||||
}
|
||||
|
||||
/**
|
||||
* This is the core engine to emulate the heap usage. The only responsibility
|
||||
* of this class is to perform certain memory intensive operations to make
|
||||
* sure that some desired value of heap is used.
|
||||
*/
|
||||
public static class DefaultHeapUsageEmulator
|
||||
implements HeapUsageEmulatorCore {
|
||||
// store the unit loads in a list
|
||||
protected static ArrayList<Object> heapSpace = new ArrayList<Object>();
|
||||
|
||||
/**
|
||||
* Increase heap usage by current process by the given amount.
|
||||
* This is done by creating objects each of size 1MB.
|
||||
*/
|
||||
public void load(long sizeInMB) {
|
||||
for (long i = 0; i < sizeInMB; ++i) {
|
||||
// Create another String object of size 1MB
|
||||
heapSpace.add((Object)new byte[ONE_MB]);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* This will initialize the core and check if the core can emulate the
|
||||
* desired target on the underlying hardware.
|
||||
*/
|
||||
public void initialize(ResourceCalculatorPlugin monitor,
|
||||
long totalHeapUsageInMB) {
|
||||
long maxPhysicalMemoryInMB = monitor.getPhysicalMemorySize() / ONE_MB ;
|
||||
if(maxPhysicalMemoryInMB < totalHeapUsageInMB) {
|
||||
throw new RuntimeException("Total heap the can be used is "
|
||||
+ maxPhysicalMemoryInMB
|
||||
+ " bytes while the emulator is configured to emulate a total of "
|
||||
+ totalHeapUsageInMB + " bytes");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Clear references to all the GridMix-allocated special objects so that
|
||||
* heap usage is reduced.
|
||||
*/
|
||||
@Override
|
||||
public void reset() {
|
||||
heapSpace.clear();
|
||||
}
|
||||
}
|
||||
|
||||
public TotalHeapUsageEmulatorPlugin() {
|
||||
this(new DefaultHeapUsageEmulator());
|
||||
}
|
||||
|
||||
/**
|
||||
* For testing.
|
||||
*/
|
||||
public TotalHeapUsageEmulatorPlugin(HeapUsageEmulatorCore core) {
|
||||
emulatorCore = core;
|
||||
}
|
||||
|
||||
protected long getTotalHeapUsageInMB() {
|
||||
return Runtime.getRuntime().totalMemory() / ONE_MB;
|
||||
}
|
||||
|
||||
protected long getMaxHeapUsageInMB() {
|
||||
return Runtime.getRuntime().maxMemory() / ONE_MB;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void emulate() throws IOException, InterruptedException {
|
||||
if (enabled) {
|
||||
float currentProgress = progress.getProgress();
|
||||
if (prevEmulationProgress < currentProgress
|
||||
&& ((currentProgress - prevEmulationProgress) >= emulationInterval
|
||||
|| currentProgress == 1)) {
|
||||
|
||||
long maxHeapSizeInMB = getMaxHeapUsageInMB();
|
||||
long committedHeapSizeInMB = getTotalHeapUsageInMB();
|
||||
|
||||
// Increase committed heap usage, if needed
|
||||
// Using a linear weighing function for computing the expected usage
|
||||
long expectedHeapUsageInMB =
|
||||
Math.min(maxHeapSizeInMB,
|
||||
(long) (targetHeapUsageInMB * currentProgress));
|
||||
if (expectedHeapUsageInMB < maxHeapSizeInMB
|
||||
&& committedHeapSizeInMB < expectedHeapUsageInMB) {
|
||||
long bufferInMB = (long)(minFreeHeapRatio * expectedHeapUsageInMB);
|
||||
long currentDifferenceInMB =
|
||||
expectedHeapUsageInMB - committedHeapSizeInMB;
|
||||
long currentIncrementLoadSizeInMB =
|
||||
(long)(currentDifferenceInMB * heapLoadRatio);
|
||||
// Make sure that at least 1 MB is incremented.
|
||||
currentIncrementLoadSizeInMB =
|
||||
Math.max(1, currentIncrementLoadSizeInMB);
|
||||
while (committedHeapSizeInMB + bufferInMB < expectedHeapUsageInMB) {
|
||||
// add blocks in order of X% of the difference, X = 10% by default
|
||||
emulatorCore.load(currentIncrementLoadSizeInMB);
|
||||
committedHeapSizeInMB = getTotalHeapUsageInMB();
|
||||
}
|
||||
}
|
||||
|
||||
// store the emulation progress boundary
|
||||
prevEmulationProgress = currentProgress;
|
||||
}
|
||||
|
||||
// reset the core so that the garbage is reclaimed
|
||||
emulatorCore.reset();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void initialize(Configuration conf, ResourceUsageMetrics metrics,
|
||||
ResourceCalculatorPlugin monitor,
|
||||
Progressive progress) {
|
||||
// get the target heap usage
|
||||
targetHeapUsageInMB = metrics.getHeapUsage() / ONE_MB;
|
||||
if (targetHeapUsageInMB <= 0 ) {
|
||||
enabled = false;
|
||||
return;
|
||||
} else {
|
||||
// calibrate the core heap-usage utility
|
||||
emulatorCore.initialize(monitor, targetHeapUsageInMB);
|
||||
enabled = true;
|
||||
}
|
||||
|
||||
this.progress = progress;
|
||||
emulationInterval =
|
||||
conf.getFloat(HEAP_EMULATION_PROGRESS_INTERVAL,
|
||||
DEFAULT_EMULATION_PROGRESS_INTERVAL);
|
||||
|
||||
minFreeHeapRatio = conf.getFloat(MIN_HEAP_FREE_RATIO,
|
||||
DEFAULT_MIN_FREE_HEAP_RATIO);
|
||||
|
||||
heapLoadRatio = conf.getFloat(HEAP_LOAD_RATIO, DEFAULT_HEAP_LOAD_RATIO);
|
||||
|
||||
prevEmulationProgress = 0;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,453 @@
|
|||
/**
|
||||
* 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.mapred.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.mapreduce.MRJobConfig;
|
||||
import org.apache.hadoop.mapreduce.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();
|
||||
// reset the configuration parameters
|
||||
simulatedConf.unset(MRJobConfig.MAP_JAVA_OPTS);
|
||||
simulatedConf.unset(MRJobConfig.REDUCE_JAVA_OPTS);
|
||||
simulatedConf.unset(JobConf.MAPRED_TASK_JAVA_OPTS);
|
||||
|
||||
// set the default map task options
|
||||
if (defaultMapOptions != null) {
|
||||
simulatedConf.set(MRJobConfig.MAP_JAVA_OPTS, defaultMapOptions);
|
||||
}
|
||||
// set the default reduce task options
|
||||
if (defaultReduceOptions != null) {
|
||||
simulatedConf.set(MRJobConfig.REDUCE_JAVA_OPTS, defaultReduceOptions);
|
||||
}
|
||||
// set the default task options
|
||||
if (defaultTaskOptions != null) {
|
||||
simulatedConf.set(JobConf.MAPRED_TASK_JAVA_OPTS, defaultTaskOptions);
|
||||
}
|
||||
|
||||
Configuration originalConf = new Configuration();
|
||||
// reset the configuration parameters
|
||||
originalConf.unset(MRJobConfig.MAP_JAVA_OPTS);
|
||||
originalConf.unset(MRJobConfig.REDUCE_JAVA_OPTS);
|
||||
originalConf.unset(JobConf.MAPRED_TASK_JAVA_OPTS);
|
||||
|
||||
// set the map task options
|
||||
if (mapOptions != null) {
|
||||
originalConf.set(MRJobConfig.MAP_JAVA_OPTS, mapOptions);
|
||||
}
|
||||
// set the reduce task options
|
||||
if (reduceOptions != null) {
|
||||
originalConf.set(MRJobConfig.REDUCE_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(MRJobConfig.MAP_JAVA_OPTS));
|
||||
assertEquals("Reduce heap options mismatch!", expectedReduceOptions,
|
||||
simulatedConf.get(MRJobConfig.REDUCE_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(MRJobConfig.MAP_JAVA_OPTS, "-Xmx1m");
|
||||
gridmixConf.set(MRJobConfig.REDUCE_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(MRJobConfig.MAP_JAVA_OPTS, "-Xmx10m");
|
||||
originalConf.set(MRJobConfig.REDUCE_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(MRJobConfig.MAP_JAVA_OPTS));
|
||||
assertEquals("Reduce heap options works when disabled!", "-Xmx2m",
|
||||
simulatedConf.get(MRJobConfig.REDUCE_JAVA_OPTS));
|
||||
assertEquals("Task heap options works when disabled!", "-Xmx3m",
|
||||
simulatedConf.get(JobConf.MAPRED_TASK_JAVA_OPTS));
|
||||
}
|
||||
}
|
||||
|
|
@ -41,7 +41,7 @@ public class TestHighRamJob {
|
|||
/**
|
||||
* A dummy {@link GridmixJob} that opens up the simulated job for testing.
|
||||
*/
|
||||
private static class DummyGridmixJob extends GridmixJob {
|
||||
protected static class DummyGridmixJob extends GridmixJob {
|
||||
public DummyGridmixJob(Configuration conf, JobStory desc)
|
||||
throws IOException {
|
||||
super(conf, System.currentTimeMillis(), desc, new Path("test"),
|
||||
|
|
|
|||
|
|
@ -427,7 +427,7 @@ public class TestResourceUsageEmulators {
|
|||
}
|
||||
|
||||
// Creates a ResourceUsageMetrics object from the target usage
|
||||
private static ResourceUsageMetrics createMetrics(long target) {
|
||||
static ResourceUsageMetrics createMetrics(long target) {
|
||||
ResourceUsageMetrics metrics = new ResourceUsageMetrics();
|
||||
metrics.setCumulativeCpuUsage(target);
|
||||
metrics.setVirtualMemoryUsage(target);
|
||||
|
|
@ -487,7 +487,7 @@ public class TestResourceUsageEmulators {
|
|||
targetCpuUsage, targetCpuUsage / unitCpuUsage);
|
||||
|
||||
// test with custom value for emulation interval of 20%
|
||||
conf.setFloat(CumulativeCpuUsageEmulatorPlugin.CPU_EMULATION_FREQUENCY,
|
||||
conf.setFloat(CumulativeCpuUsageEmulatorPlugin.CPU_EMULATION_PROGRESS_INTERVAL,
|
||||
0.2F);
|
||||
testEmulationAccuracy(conf, fakeCore, monitor, metrics, cpuPlugin,
|
||||
targetCpuUsage, targetCpuUsage / unitCpuUsage);
|
||||
|
|
@ -497,7 +497,7 @@ public class TestResourceUsageEmulators {
|
|||
fakeProgress = new FakeProgressive(); // initialize
|
||||
fakeCore.reset();
|
||||
fakeCore.setUnitUsage(1);
|
||||
conf.setFloat(CumulativeCpuUsageEmulatorPlugin.CPU_EMULATION_FREQUENCY,
|
||||
conf.setFloat(CumulativeCpuUsageEmulatorPlugin.CPU_EMULATION_PROGRESS_INTERVAL,
|
||||
0.25F);
|
||||
cpuPlugin.initialize(conf, metrics, monitor, fakeProgress);
|
||||
// take a snapshot after the initialization
|
||||
|
|
@ -534,7 +534,7 @@ public class TestResourceUsageEmulators {
|
|||
fakeProgress = new FakeProgressive(); // initialize
|
||||
fakeCore.reset();
|
||||
fakeCore.setUnitUsage(unitCpuUsage);
|
||||
conf.setFloat(CumulativeCpuUsageEmulatorPlugin.CPU_EMULATION_FREQUENCY,
|
||||
conf.setFloat(CumulativeCpuUsageEmulatorPlugin.CPU_EMULATION_PROGRESS_INTERVAL,
|
||||
0.40F);
|
||||
cpuPlugin.initialize(conf, metrics, monitor, fakeProgress);
|
||||
// take a snapshot after the initialization
|
||||
|
|
|
|||
|
|
@ -198,6 +198,15 @@ hadoop jar <gridmix-jar> org.apache.hadoop.mapred.gridmix.Gridmix \
|
|||
<td>The maximum size of the input files. The default limit is 100
|
||||
TiB.</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<code>gridmix.task.jvm-options.enable</code>
|
||||
</td>
|
||||
<td>Enables Gridmix to configure the simulated task's max heap
|
||||
options using the values obtained from the original task (i.e via
|
||||
trace).
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
</section>
|
||||
<section id="jobtypes">
|
||||
|
|
@ -703,9 +712,25 @@ hadoop jar <gridmix-jar> org.apache.hadoop.mapred.gridmix.Gridmix \
|
|||
CPU usage emulator is designed in such a way that
|
||||
it only emulates at specific progress boundaries of the task. This
|
||||
interval can be configured using
|
||||
<code>gridmix.emulators.resource-usage.cpu.frequency</code>. The
|
||||
default value for this parameter is <code>0.1</code> i.e
|
||||
<code>gridmix.emulators.resource-usage.cpu.emulation-interval</code>.
|
||||
The default value for this parameter is <code>0.1</code> i.e
|
||||
<code>10%</code>.
|
||||
</li>
|
||||
<li>Total heap usage <em>emulator</em>:
|
||||
GridMix uses the total heap usage value published by Rumen
|
||||
and makes sure that the total heap usage of the simulated
|
||||
task is close to the value published by Rumen. GridMix can be
|
||||
configured to emulate cumulative heap usage by adding
|
||||
<code>org.apache.hadoop.mapred.gridmix.emulators.resourceusage
|
||||
.TotalHeapUsageEmulatorPlugin</code> to the list of emulator
|
||||
<em>plugins</em> configured for the
|
||||
<code>gridmix.emulators.resource-usage.plugins</code> parameter.
|
||||
Heap usage emulator is designed in such a way that
|
||||
it only emulates at specific progress boundaries of the task. This
|
||||
interval can be configured using
|
||||
<code>gridmix.emulators.resource-usage.heap.emulation-interval
|
||||
</code>. The default value for this parameter is <code>0.1</code>
|
||||
i.e <code>10%</code> progress interval.
|
||||
</li>
|
||||
</ul>
|
||||
<p>Note that GridMix will emulate resource usages only for jobs of type
|
||||
|
|
|
|||
Loading…
Reference in New Issue