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Introduce ConcurrentQueryProfiler to profile query using concurrent s…
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…egment search path and support concurrency during rewrite and create weight (#10352)

* Fix timer race condition in profile rewrite and create weight for concurrent segment search (#10352)

Signed-off-by: Ticheng Lin <[email protected]>

* Refactor and work on the PR comments (#10352)

Signed-off-by: Ticheng Lin <[email protected]>

---------

Signed-off-by: Ticheng Lin <[email protected]>
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ticheng-aws authored Oct 20, 2023
1 parent 781968b commit 200ad5d
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -92,6 +92,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
- Per request phase latency ([#10351](https://github.com/opensearch-project/OpenSearch/issues/10351))
- [Remote Store] Add repository stats for remote store([#10567](https://github.com/opensearch-project/OpenSearch/pull/10567))
- Add search query categorizer ([#10255](https://github.com/opensearch-project/OpenSearch/pull/10255))
- Introduce ConcurrentQueryProfiler to profile query using concurrent segment search path and support concurrency during rewrite and create weight ([10352](https://github.com/opensearch-project/OpenSearch/pull/10352))

### Dependencies
- Bump `com.google.api.grpc:proto-google-common-protos` from 2.10.0 to 2.25.1 ([#10208](https://github.com/opensearch-project/OpenSearch/pull/10208), [#10298](https://github.com/opensearch-project/OpenSearch/pull/10298))
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157 changes: 155 additions & 2 deletions server/src/internalClusterTest/java/org/opensearch/search/profile/query/QueryProfilerIT.java
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Expand Up @@ -32,6 +32,8 @@

package org.opensearch.search.profile.query;

import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;

import org.apache.lucene.tests.util.English;
import org.opensearch.action.index.IndexRequestBuilder;
import org.opensearch.action.search.MultiSearchResponse;
Expand All @@ -40,29 +42,56 @@
import org.opensearch.action.search.SearchType;
import org.opensearch.action.search.ShardSearchFailure;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.util.FeatureFlags;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;
import org.opensearch.search.SearchHit;
import org.opensearch.search.profile.ProfileResult;
import org.opensearch.search.profile.ProfileShardResult;
import org.opensearch.search.sort.SortOrder;
import org.opensearch.test.OpenSearchIntegTestCase;
import org.opensearch.test.ParameterizedOpenSearchIntegTestCase;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import static org.opensearch.search.SearchService.CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING;
import static org.opensearch.search.profile.query.RandomQueryGenerator.randomQueryBuilder;
import static org.hamcrest.Matchers.emptyOrNullString;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.greaterThan;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.not;
import static org.hamcrest.Matchers.nullValue;

public class QueryProfilerIT extends ParameterizedOpenSearchIntegTestCase {
private final boolean concurrentSearchEnabled;
private static final String MAX_PREFIX = "max_";
private static final String MIN_PREFIX = "min_";
private static final String AVG_PREFIX = "avg_";
private static final String TIMING_TYPE_COUNT_SUFFIX = "_count";

public QueryProfilerIT(Settings settings, boolean concurrentSearchEnabled) {
super(settings);
this.concurrentSearchEnabled = concurrentSearchEnabled;
}

public class QueryProfilerIT extends OpenSearchIntegTestCase {
@ParametersFactory
public static Collection<Object[]> parameters() {
return Arrays.asList(
new Object[] { Settings.builder().put(CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING.getKey(), false).build(), false },
new Object[] { Settings.builder().put(CLUSTER_CONCURRENT_SEGMENT_SEARCH_SETTING.getKey(), true).build(), true }
);
}

@Override
protected Settings featureFlagSettings() {
return Settings.builder().put(super.featureFlagSettings()).put(FeatureFlags.CONCURRENT_SEGMENT_SEARCH, "true").build();
}

/**
* This test simply checks to make sure nothing crashes. Test indexes 100-150 documents,
Expand Down Expand Up @@ -229,6 +258,7 @@ public void testSimpleMatch() throws Exception {
assertEquals(result.getLuceneDescription(), "field1:one");
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -271,6 +301,7 @@ public void testBool() throws Exception {
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertEquals(result.getProfiledChildren().size(), 2);
assertQueryProfileResult(result);

// Check the children
List<ProfileResult> children = result.getProfiledChildren();
Expand All @@ -282,12 +313,14 @@ public void testBool() throws Exception {
assertThat(childProfile.getTime(), greaterThan(0L));
assertNotNull(childProfile.getTimeBreakdown());
assertEquals(childProfile.getProfiledChildren().size(), 0);
assertQueryProfileResult(childProfile);

childProfile = children.get(1);
assertEquals(childProfile.getQueryName(), "TermQuery");
assertEquals(childProfile.getLuceneDescription(), "field1:two");
assertThat(childProfile.getTime(), greaterThan(0L));
assertNotNull(childProfile.getTimeBreakdown());
assertQueryProfileResult(childProfile);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -330,6 +363,7 @@ public void testEmptyBool() throws Exception {
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -375,6 +409,7 @@ public void testCollapsingBool() throws Exception {
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -415,6 +450,90 @@ public void testBoosting() throws Exception {
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
assertThat(result.getName(), is(not(emptyOrNullString())));
assertThat(result.getTime(), greaterThan(0L));
}
}
}

public void testSearchLeafForItsLeavesAndRewriteQuery() throws Exception {
createIndex("test");
ensureGreen();

int numDocs = 122;
IndexRequestBuilder[] docs = new IndexRequestBuilder[numDocs];
for (int i = 0; i < numDocs; i++) {
docs[i] = client().prepareIndex("test").setId(String.valueOf(i)).setSource("field1", English.intToEnglish(i), "field2", i);
}

List<String> terms = Arrays.asList("zero", "zero", "one");

indexRandom(true, docs);

refresh();

QueryBuilder q = QueryBuilders.boostingQuery(
QueryBuilders.idsQuery().addIds(String.valueOf(randomInt()), String.valueOf(randomInt())),
QueryBuilders.termsQuery("field1", terms)
).boost(randomFloat()).negativeBoost(randomFloat());
logger.info("Query: {}", q);

SearchResponse resp = client().prepareSearch()
.setQuery(q)
.setTrackTotalHits(true)
.setProfile(true)
.setSearchType(SearchType.QUERY_THEN_FETCH)
.get();

assertNotNull("Profile response element should not be null", resp.getProfileResults());
assertThat("Profile response should not be an empty array", resp.getProfileResults().size(), not(0));

for (Map.Entry<String, ProfileShardResult> shardResult : resp.getProfileResults().entrySet()) {
assertThat(shardResult.getValue().getNetworkTime().getInboundNetworkTime(), greaterThanOrEqualTo(0L));
assertThat(shardResult.getValue().getNetworkTime().getOutboundNetworkTime(), greaterThanOrEqualTo(0L));
for (QueryProfileShardResult searchProfiles : shardResult.getValue().getQueryProfileResults()) {
List<ProfileResult> results = searchProfiles.getQueryResults();
for (ProfileResult result : results) {
assertNotNull(result.getQueryName());
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
Map<String, Long> breakdown = result.getTimeBreakdown();
Long maxSliceTime = result.getMaxSliceTime();
Long minSliceTime = result.getMinSliceTime();
Long avgSliceTime = result.getAvgSliceTime();
if (concurrentSearchEnabled && results.get(0).equals(result)) {
assertNotNull(maxSliceTime);
assertNotNull(minSliceTime);
assertNotNull(avgSliceTime);
assertThat(breakdown.size(), equalTo(66));
for (QueryTimingType queryTimingType : QueryTimingType.values()) {
if (queryTimingType != QueryTimingType.CREATE_WEIGHT) {
String maxTimingType = MAX_PREFIX + queryTimingType;
String minTimingType = MIN_PREFIX + queryTimingType;
String avgTimingType = AVG_PREFIX + queryTimingType;
assertNotNull(breakdown.get(maxTimingType));
assertNotNull(breakdown.get(minTimingType));
assertNotNull(breakdown.get(avgTimingType));
assertNotNull(breakdown.get(maxTimingType + TIMING_TYPE_COUNT_SUFFIX));
assertNotNull(breakdown.get(minTimingType + TIMING_TYPE_COUNT_SUFFIX));
assertNotNull(breakdown.get(avgTimingType + TIMING_TYPE_COUNT_SUFFIX));
}
}
} else if (concurrentSearchEnabled) {
assertThat(maxSliceTime, equalTo(0L));
assertThat(minSliceTime, equalTo(0L));
assertThat(avgSliceTime, equalTo(0L));
assertThat(breakdown.size(), equalTo(27));
} else {
assertThat(maxSliceTime, is(nullValue()));
assertThat(minSliceTime, is(nullValue()));
assertThat(avgSliceTime, is(nullValue()));
assertThat(breakdown.size(), equalTo(27));
}
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -455,6 +574,7 @@ public void testDisMaxRange() throws Exception {
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -494,6 +614,7 @@ public void testRange() throws Exception {
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -547,6 +668,7 @@ public void testPhrase() throws Exception {
assertNotNull(result.getLuceneDescription());
assertThat(result.getTime(), greaterThan(0L));
assertNotNull(result.getTimeBreakdown());
assertQueryProfileResult(result);
}

CollectorResult result = searchProfiles.getCollectorResult();
Expand Down Expand Up @@ -579,4 +701,35 @@ public void testNoProfile() throws Exception {
assertThat("Profile response element should be an empty map", resp.getProfileResults().size(), equalTo(0));
}

private void assertQueryProfileResult(ProfileResult result) {
Map<String, Long> breakdown = result.getTimeBreakdown();
Long maxSliceTime = result.getMaxSliceTime();
Long minSliceTime = result.getMinSliceTime();
Long avgSliceTime = result.getAvgSliceTime();
if (concurrentSearchEnabled) {
assertNotNull(maxSliceTime);
assertNotNull(minSliceTime);
assertNotNull(avgSliceTime);
assertThat(breakdown.size(), equalTo(66));
for (QueryTimingType queryTimingType : QueryTimingType.values()) {
if (queryTimingType != QueryTimingType.CREATE_WEIGHT) {
String maxTimingType = MAX_PREFIX + queryTimingType;
String minTimingType = MIN_PREFIX + queryTimingType;
String avgTimingType = AVG_PREFIX + queryTimingType;
assertNotNull(breakdown.get(maxTimingType));
assertNotNull(breakdown.get(minTimingType));
assertNotNull(breakdown.get(avgTimingType));
assertNotNull(breakdown.get(maxTimingType + TIMING_TYPE_COUNT_SUFFIX));
assertNotNull(breakdown.get(minTimingType + TIMING_TYPE_COUNT_SUFFIX));
assertNotNull(breakdown.get(avgTimingType + TIMING_TYPE_COUNT_SUFFIX));
}
}
} else {
assertThat(maxSliceTime, is(nullValue()));
assertThat(minSliceTime, is(nullValue()));
assertThat(avgSliceTime, is(nullValue()));
assertThat(breakdown.size(), equalTo(27));
}
}

}
7 changes: 6 additions & 1 deletion server/src/main/java/org/opensearch/search/profile/Profilers.java
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Expand Up @@ -35,6 +35,9 @@
import org.opensearch.search.internal.ContextIndexSearcher;
import org.opensearch.search.profile.aggregation.AggregationProfiler;
import org.opensearch.search.profile.aggregation.ConcurrentAggregationProfiler;
import org.opensearch.search.profile.query.ConcurrentQueryProfileTree;
import org.opensearch.search.profile.query.ConcurrentQueryProfiler;
import org.opensearch.search.profile.query.InternalQueryProfileTree;
import org.opensearch.search.profile.query.QueryProfiler;

import java.util.ArrayList;
Expand Down Expand Up @@ -64,7 +67,9 @@ public Profilers(ContextIndexSearcher searcher, boolean isConcurrentSegmentSearc

/** Switch to a new profile. */
public QueryProfiler addQueryProfiler() {
QueryProfiler profiler = new QueryProfiler(isConcurrentSegmentSearchEnabled);
QueryProfiler profiler = isConcurrentSegmentSearchEnabled
? new ConcurrentQueryProfiler(new ConcurrentQueryProfileTree())
: new QueryProfiler(new InternalQueryProfileTree());
searcher.setProfiler(profiler);
queryProfilers.add(profiler);
return profiler;
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12 changes: 12 additions & 0 deletions server/src/main/java/org/opensearch/search/profile/Timer.java
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Expand Up @@ -53,6 +53,18 @@ public class Timer {
private boolean doTiming;
private long timing, count, lastCount, start, earliestTimerStartTime;

public Timer() {
this(0, 0, 0, 0, 0);
}

public Timer(long timing, long count, long lastCount, long start, long earliestTimerStartTime) {
this.timing = timing;
this.count = count;
this.lastCount = lastCount;
this.start = start;
this.earliestTimerStartTime = earliestTimerStartTime;
}

/** pkg-private for testing */
long nanoTime() {
return System.nanoTime();
Expand Down
5 changes: 1 addition & 4 deletions server/src/main/java/org/opensearch/search/profile/query/AbstractQueryProfileTree.java
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Expand Up @@ -54,14 +54,11 @@ public void startRewriteTime() {
* startRewriteTime() must be called for a particular context prior to calling
* stopAndAddRewriteTime(), otherwise the elapsed time will be negative and
* nonsensical
*
* @return The elapsed time
*/
public long stopAndAddRewriteTime() {
public void stopAndAddRewriteTime() {
long time = Math.max(1, System.nanoTime() - rewriteScratch);
rewriteTime += time;
rewriteScratch = 0;
return time;
}

public long getRewriteTime() {
Expand Down
27 changes: 22 additions & 5 deletions ...er/src/main/java/org/opensearch/search/profile/query/ConcurrentQueryProfileBreakdown.java
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Expand Up @@ -70,14 +70,29 @@ public Map<String, Long> toBreakdownMap() {
);
final long createWeightTime = topLevelBreakdownMapWithWeightTime.get(QueryTimingType.CREATE_WEIGHT.toString());

if (sliceCollectorsToLeaves.isEmpty() || contexts.isEmpty()) {
if (contexts.isEmpty()) {
// If there are no leaf contexts, then return the default concurrent query level breakdown, which will include the
// create_weight time/count
queryNodeTime = createWeightTime;
maxSliceNodeTime = 0L;
minSliceNodeTime = 0L;
avgSliceNodeTime = 0L;
return buildDefaultQueryBreakdownMap(createWeightTime);
} else if (sliceCollectorsToLeaves.isEmpty()) {
// This will happen when each slice executes search leaf for its leaves and query is rewritten for the leaf being searched. It
// creates a new weight and breakdown map for each rewritten query. This new breakdown map captures the timing information for
// the new rewritten query. The sliceCollectorsToLeaves is empty because this breakdown for rewritten query gets created later
// in search leaf path which doesn't have collector. Also, this is not needed since this breakdown is per leaf and there is no
// concurrency involved. An empty sliceCollectorsToLeaves could also happen in the case of early termination.
AbstractProfileBreakdown<QueryTimingType> breakdown = contexts.values().iterator().next();
queryNodeTime = breakdown.toNodeTime() + createWeightTime;
maxSliceNodeTime = 0L;
minSliceNodeTime = 0L;
avgSliceNodeTime = 0L;
Map<String, Long> queryBreakdownMap = new HashMap<>(breakdown.toBreakdownMap());
queryBreakdownMap.put(QueryTimingType.CREATE_WEIGHT.toString(), createWeightTime);
queryBreakdownMap.put(QueryTimingType.CREATE_WEIGHT + TIMING_TYPE_COUNT_SUFFIX, 1L);
return queryBreakdownMap;
}

// first create the slice level breakdowns
Expand Down Expand Up @@ -191,10 +206,12 @@ Map<Collector, Map<String, Long>> buildSliceLevelBreakdown() {
}
// compute sliceMaxEndTime as max of sliceEndTime across all timing types
sliceMaxEndTime = Math.max(sliceMaxEndTime, currentSliceBreakdown.getOrDefault(timingTypeSliceEndTimeKey, Long.MIN_VALUE));
sliceMinStartTime = Math.min(
sliceMinStartTime,
currentSliceBreakdown.getOrDefault(timingTypeSliceStartTimeKey, Long.MAX_VALUE)
);
long currentSliceStartTime = currentSliceBreakdown.getOrDefault(timingTypeSliceStartTimeKey, Long.MAX_VALUE);
if (currentSliceStartTime == 0L) {
// The timer for the current timing type never starts, so we continue here
continue;
}
sliceMinStartTime = Math.min(sliceMinStartTime, currentSliceStartTime);
// compute total time for each timing type at slice level using sliceEndTime and sliceStartTime
currentSliceBreakdown.put(
timingType.toString(),
Expand Down
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