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Adds the listener for resource utilization metrics #687

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merged 8 commits into from
Jul 23, 2024
Merged

Adds the listener for resource utilization metrics #687

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d7d5660
Adds the listener for resource utilization metrics
Jul 20, 2024
aad2bfd
Fixes the same task issue
Jul 22, 2024
cf42943
Fixes the failing test
Jul 22, 2024
1cb5c43
Fixes the failing test
Jul 23, 2024
b137a47
Fixes the failing test
Jul 23, 2024
6899623
Fixes the failing test
Jul 23, 2024
34ebcc4
Addresses the review comments
Jul 23, 2024
590ba5d
Addresses the review comments
Jul 23, 2024
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10 changes: 8 additions & 2 deletions src/main/java/org/opensearch/performanceanalyzer/PerformanceAnalyzerPlugin.java
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Expand Up @@ -86,7 +86,9 @@
import org.opensearch.performanceanalyzer.http_action.whoami.TransportWhoAmIAction;
import org.opensearch.performanceanalyzer.http_action.whoami.WhoAmIAction;
import org.opensearch.performanceanalyzer.listener.PerformanceAnalyzerSearchListener;
import org.opensearch.performanceanalyzer.listener.RTFPerformanceAnalyzerSearchListener;
import org.opensearch.performanceanalyzer.transport.PerformanceAnalyzerTransportInterceptor;
import org.opensearch.performanceanalyzer.transport.RTFPerformanceAnalyzerTransportInterceptor;
import org.opensearch.performanceanalyzer.util.Utils;
import org.opensearch.performanceanalyzer.writer.EventLogQueueProcessor;
import org.opensearch.plugins.ActionPlugin;
Expand Down Expand Up @@ -302,7 +304,10 @@
public void onIndexModule(IndexModule indexModule) {
PerformanceAnalyzerSearchListener performanceanalyzerSearchListener =
new PerformanceAnalyzerSearchListener(performanceAnalyzerController);
RTFPerformanceAnalyzerSearchListener rtfPerformanceAnalyzerSearchListener =

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new RTFPerformanceAnalyzerSearchListener(performanceAnalyzerController);
indexModule.addSearchOperationListener(performanceanalyzerSearchListener);
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indexModule.addSearchOperationListener(rtfPerformanceAnalyzerSearchListener);

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}

// follower check, leader check
Expand Down Expand Up @@ -330,8 +335,9 @@
@Override
public List<TransportInterceptor> getTransportInterceptors(
NamedWriteableRegistry namedWriteableRegistry, ThreadContext threadContext) {
return singletonList(
new PerformanceAnalyzerTransportInterceptor(performanceAnalyzerController));
return Arrays.asList(
new PerformanceAnalyzerTransportInterceptor(performanceAnalyzerController),
new RTFPerformanceAnalyzerTransportInterceptor(performanceAnalyzerController));
}

@Override
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9 changes: 9 additions & 0 deletions src/main/java/org/opensearch/performanceanalyzer/config/PerformanceAnalyzerController.java
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Expand Up @@ -383,4 +383,13 @@

return disabledCollectorsList.contains(collectorName);
}

/**
* Collectors Setting value.
*
* @return collectorsSettingValue
*/
public int getCollectorsSettingValue() {
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return collectorsSettingValue;

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}
}
14 changes: 12 additions & 2 deletions ...n/java/org/opensearch/performanceanalyzer/listener/PerformanceAnalyzerSearchListener.java
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import static org.opensearch.performanceanalyzer.commons.stats.metrics.StatExceptionCode.OPENSEARCH_REQUEST_INTERCEPTOR_ERROR;

import com.google.common.annotations.VisibleForTesting;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.opensearch.index.shard.SearchOperationListener;
Expand All @@ -16,6 +17,7 @@
import org.opensearch.performanceanalyzer.commons.metrics.MetricsProcessor;
import org.opensearch.performanceanalyzer.commons.metrics.PerformanceAnalyzerMetrics;
import org.opensearch.performanceanalyzer.commons.util.ThreadIDUtil;
import org.opensearch.performanceanalyzer.commons.util.Util;
import org.opensearch.performanceanalyzer.config.PerformanceAnalyzerController;
import org.opensearch.search.internal.SearchContext;

Expand All @@ -36,8 +38,16 @@ public String toString() {
return PerformanceAnalyzerSearchListener.class.getSimpleName();
}

private SearchListener getSearchListener() {
return controller.isPerformanceAnalyzerEnabled() ? this : NO_OP_SEARCH_LISTENER;
@VisibleForTesting
SearchListener getSearchListener() {
return isSearchListenerEnabled() ? this : NO_OP_SEARCH_LISTENER;
}

private boolean isSearchListenerEnabled() {
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return controller.isPerformanceAnalyzerEnabled()
&& (controller.getCollectorsSettingValue() == Util.CollectorMode.DUAL.getValue()
|| controller.getCollectorsSettingValue()
== Util.CollectorMode.RCA.getValue());
}

@Override
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316 changes: 316 additions & 0 deletions ...ava/org/opensearch/performanceanalyzer/listener/RTFPerformanceAnalyzerSearchListener.java
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@@ -0,0 +1,316 @@
/*
* Copyright OpenSearch Contributors
* SPDX-License-Identifier: Apache-2.0
*/

package org.opensearch.performanceanalyzer.listener;

import static org.opensearch.performanceanalyzer.commons.stats.metrics.StatExceptionCode.OPENSEARCH_REQUEST_INTERCEPTOR_ERROR;

import com.google.common.annotations.VisibleForTesting;
import java.util.HashMap;
import java.util.Map;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.opensearch.core.action.NotifyOnceListener;
import org.opensearch.index.shard.SearchOperationListener;
import org.opensearch.performanceanalyzer.OpenSearchResources;
import org.opensearch.performanceanalyzer.commons.collectors.StatsCollector;
import org.opensearch.performanceanalyzer.commons.metrics.RTFMetrics;
import org.opensearch.performanceanalyzer.commons.util.Util;
import org.opensearch.performanceanalyzer.config.PerformanceAnalyzerController;
import org.opensearch.performanceanalyzer.util.Utils;
import org.opensearch.search.internal.SearchContext;
import org.opensearch.tasks.Task;
import org.opensearch.telemetry.metrics.Histogram;
import org.opensearch.telemetry.metrics.MetricsRegistry;
import org.opensearch.telemetry.metrics.tags.Tags;

/**
* {@link SearchOperationListener} to capture the resource utilization of a shard search operation.
* This will be getting the resource tracking information from the {@link
* org.opensearch.tasks.TaskResourceTrackingService}.
*/
public class RTFPerformanceAnalyzerSearchListener
implements SearchOperationListener, SearchListener {

private static final Logger LOG =
LogManager.getLogger(RTFPerformanceAnalyzerSearchListener.class);
private static final String OPERATION_SHARD_FETCH = "shard_fetch";
private static final String OPERATION_SHARD_QUERY = "shard_query";
public static final String QUERY_START_TIME = "query_start_time";
public static final String FETCH_START_TIME = "fetch_start_time";
public static final String QUERY_TASK_ID = "query_task_id";
private final ThreadLocal<Map<String, Long>> threadLocal;
private static final SearchListener NO_OP_SEARCH_LISTENER = new NoOpSearchListener();

private final PerformanceAnalyzerController controller;
private final Histogram cpuUtilizationHistogram;
private final Histogram heapUsedHistogram;
private final int numProcessors;

public RTFPerformanceAnalyzerSearchListener(final PerformanceAnalyzerController controller) {
this.controller = controller;
this.cpuUtilizationHistogram = createCPUUtilizationHistogram();
heapUsedHistogram = createHeapUsedHistogram();
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this.threadLocal = ThreadLocal.withInitial(() -> new HashMap<String, Long>());
this.numProcessors = Runtime.getRuntime().availableProcessors();
}

private Histogram createCPUUtilizationHistogram() {
MetricsRegistry metricsRegistry = OpenSearchResources.INSTANCE.getMetricsRegistry();
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if (metricsRegistry != null) {
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If the registry is null it does not make sense to create this listener, Do we need to throw exception instead of returning null?

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No. We just want to stay silent.

return metricsRegistry.createHistogram(
RTFMetrics.OSMetrics.CPU_UTILIZATION.toString(),
"CPU Utilization per shard for an operation",
RTFMetrics.MetricUnits.RATE.toString());
} else {
LOG.debug("MetricsRegistry is null");
return null;

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}
}

private Histogram createHeapUsedHistogram() {
MetricsRegistry metricsRegistry = OpenSearchResources.INSTANCE.getMetricsRegistry();
if (metricsRegistry != null) {
return metricsRegistry.createHistogram(
RTFMetrics.OSMetrics.HEAP_ALLOCATED.toString(),
"Heap used per shard for an operation",
RTFMetrics.MetricUnits.BYTE.toString());
} else {
LOG.debug("MetricsRegistry is null");
return null;

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}
}

@Override
public String toString() {
return RTFPerformanceAnalyzerSearchListener.class.getSimpleName();
}

@VisibleForTesting
SearchListener getSearchListener() {
return isSearchListenerEnabled() ? this : NO_OP_SEARCH_LISTENER;
}

private boolean isSearchListenerEnabled() {
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isSearchListenerEnabled seems to be a mandatory method for any SearchListeners implementation. Should we add it to the super class and all the subclasses needs to write the logic of this method.

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We can do that. Didn't want to change a lot the existing stuff as anyways the plan is to bring this into core at some point in time.

LOG.debug(
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"Controller enable status {}, CollectorMode value {}",
controller.isPerformanceAnalyzerEnabled(),
controller.getCollectorsSettingValue());
return OpenSearchResources.INSTANCE.getMetricsRegistry() != null
&& controller.isPerformanceAnalyzerEnabled()
&& (controller.getCollectorsSettingValue() == Util.CollectorMode.DUAL.getValue()
|| controller.getCollectorsSettingValue()
== Util.CollectorMode.TELEMETRY.getValue());
}

@Override
public void onPreQueryPhase(SearchContext searchContext) {
try {
getSearchListener().preQueryPhase(searchContext);
} catch (Exception ex) {
LOG.error(ex);
StatsCollector.instance().logException(OPENSEARCH_REQUEST_INTERCEPTOR_ERROR);
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Why are we throwing only OPENSEARCH_REQUEST_INTERCEPTOR_ERROR from all the Phases?
Is this correct or do we need to throw different exceptions from different Phases.

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This is just to add a stat that there is some issue with the interceptor.

}
}

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@Override
public void onQueryPhase(SearchContext searchContext, long tookInNanos) {
try {
getSearchListener().queryPhase(searchContext, tookInNanos);
} catch (Exception ex) {
LOG.error(ex);
StatsCollector.instance().logException(OPENSEARCH_REQUEST_INTERCEPTOR_ERROR);
}
}

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@Override
public void onFailedQueryPhase(SearchContext searchContext) {
try {
getSearchListener().failedQueryPhase(searchContext);
} catch (Exception ex) {
LOG.error(ex);
StatsCollector.instance().logException(OPENSEARCH_REQUEST_INTERCEPTOR_ERROR);
}
}

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@Override
public void onPreFetchPhase(SearchContext searchContext) {
try {
getSearchListener().preFetchPhase(searchContext);
} catch (Exception ex) {
LOG.error(ex);
StatsCollector.instance().logException(OPENSEARCH_REQUEST_INTERCEPTOR_ERROR);
}
}

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@Override
public void onFetchPhase(SearchContext searchContext, long tookInNanos) {
try {
getSearchListener().fetchPhase(searchContext, tookInNanos);
} catch (Exception ex) {
LOG.error(ex);
StatsCollector.instance().logException(OPENSEARCH_REQUEST_INTERCEPTOR_ERROR);
}
}

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@Override
public void onFailedFetchPhase(SearchContext searchContext) {
try {
getSearchListener().failedFetchPhase(searchContext);
} catch (Exception ex) {
LOG.error(ex);
StatsCollector.instance().logException(OPENSEARCH_REQUEST_INTERCEPTOR_ERROR);
}
}

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@Override
public void preQueryPhase(SearchContext searchContext) {
threadLocal.get().put(QUERY_START_TIME, System.nanoTime());
threadLocal.get().put(QUERY_TASK_ID, searchContext.getTask().getId());
}

@Override
public void queryPhase(SearchContext searchContext, long tookInNanos) {
long queryStartTime = threadLocal.get().getOrDefault(QUERY_START_TIME, 0l);
long queryTime = (System.nanoTime() - queryStartTime);
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addResourceTrackingCompletionListener(
searchContext, queryStartTime, queryTime, OPERATION_SHARD_QUERY, false);
}

@Override
public void failedQueryPhase(SearchContext searchContext) {
long queryStartTime = threadLocal.get().getOrDefault(QUERY_START_TIME, 0l);
long queryTime = (System.nanoTime() - queryStartTime);
addResourceTrackingCompletionListener(
searchContext, queryStartTime, queryTime, OPERATION_SHARD_QUERY, true);
}

@Override
public void preFetchPhase(SearchContext searchContext) {
threadLocal.get().put(FETCH_START_TIME, System.nanoTime());
}

@Override
public void fetchPhase(SearchContext searchContext, long tookInNanos) {
long fetchStartTime = threadLocal.get().getOrDefault(FETCH_START_TIME, 0l);
long fetchTime = (System.nanoTime() - fetchStartTime);
addResourceTrackingCompletionListenerForFetchPhase(
searchContext, fetchStartTime, fetchTime, OPERATION_SHARD_FETCH, false);
}

@Override
public void failedFetchPhase(SearchContext searchContext) {
long fetchStartTime = threadLocal.get().getOrDefault(FETCH_START_TIME, 0l);
long fetchTime = (System.nanoTime() - fetchStartTime);
addResourceTrackingCompletionListenerForFetchPhase(
searchContext, fetchStartTime, fetchTime, OPERATION_SHARD_FETCH, true);
}

private void addResourceTrackingCompletionListener(
SearchContext searchContext,
long startTime,
long queryTime,
String operation,
boolean isFailed) {
addCompletionListener(searchContext, startTime, queryTime, operation, isFailed);
}

private void addResourceTrackingCompletionListenerForFetchPhase(
SearchContext searchContext,
long fetchStartTime,
long fetchTime,
String operation,
boolean isFailed) {
long overallStartTime = fetchStartTime;
long queryTaskId = threadLocal.get().getOrDefault(QUERY_TASK_ID, 0l);
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What is the practice that is being followed for any Id that is being fetcher from threadLocal. Is it 0 by default?

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Handling null would be very tricky.

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We can use -1 instead of 0.

/**
* There are scenarios where both query and fetch pahses run in the same task for an
* optimization. Adding a special handling for that case to divide the CPU usage between
* these 2 operations by their runTime.
*/
if (queryTaskId == searchContext.getTask().getId()) {
overallStartTime = threadLocal.get().getOrDefault(QUERY_START_TIME, 0l);
}
addCompletionListener(searchContext, overallStartTime, fetchTime, operation, isFailed);
}

private void addCompletionListener(
SearchContext searchContext,
long overallStartTime,
long operationTime,
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Should we call these as SearchOperationStartTime and PhaseTookTime.

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This is common method for fetch and search,

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As these are being used in the context of search we can change operations to phase and change variable names.

overallStartTime -> startTime
operationTime -> phaseTookTime
operation -> phase

String operation,
boolean isFailed) {
searchContext
.getTask()
.addResourceTrackingCompletionListener(
createListener(
searchContext,
overallStartTime,
operationTime,
operation,
isFailed));
}

@VisibleForTesting
NotifyOnceListener<Task> createListener(
SearchContext searchContext,
long overallStartTime,
long totalOperationTime,
String operation,
boolean isFailed) {
return new NotifyOnceListener<Task>() {
@Override
protected void innerOnResponse(Task task) {
LOG.debug("Updating the counter for task {}", task.getId());
/**
* There are scenarios where cpuUsageTime consists of the total of CPU of multiple
* operations. In that case we are computing the cpuShareFactor by dividing the
* particular operationTime and the total time till this calculation happen from the
* overall start time.
*/
long totalTime = System.nanoTime() - overallStartTime;
double operationShareFactor = computeShareFactor(totalOperationTime, totalTime);
cpuUtilizationHistogram.record(
Utils.calculateCPUUtilization(
numProcessors,
totalTime,
task.getTotalResourceStats().getCpuTimeInNanos(),
operationShareFactor),
createTags());
heapUsedHistogram.record(
Math.max(
0,
task.getTotalResourceStats().getMemoryInBytes()
* operationShareFactor),
createTags());
}

private Tags createTags() {
return Tags.create()
.addTag(
RTFMetrics.CommonDimension.INDEX_NAME.toString(),
searchContext.request().shardId().getIndex().getName())
.addTag(
RTFMetrics.CommonDimension.INDEX_UUID.toString(),
searchContext.request().shardId().getIndex().getUUID())
.addTag(
RTFMetrics.CommonDimension.SHARD_ID.toString(),
searchContext.request().shardId().getId())
.addTag(RTFMetrics.CommonDimension.OPERATION.toString(), operation)
.addTag(RTFMetrics.CommonDimension.FAILED.toString(), isFailed);
}

@Override
protected void innerOnFailure(Exception e) {
LOG.error("Error is executing the the listener", e);
}

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};
}

@VisibleForTesting
static double computeShareFactor(long totalOperationTime, long totalTime) {
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Can we add a javadoc explaining what are we trying to calculate and what exactly this method provides.

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I have added it from where this is being called.

return Math.min(1, ((double) totalOperationTime) / Math.max(1.0, totalTime));
}
}
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