better profiling instructions

.gitignore

@@ -1,6 +1,7 @@
 arebac-neo4j/testdb
 *.jfr
 profile*.html
+**/profile/
 
 # Created by https://www.toptal.com/developers/gitignore/api/eclipse,java,maven
 # Edit at https://www.toptal.com/developers/gitignore?templates=eclipse,java,maven

arebac-neo4j/Benchmarks.md

@@ -27,7 +27,7 @@ java -cp target/classes:target/test-classes:target/all-dependencies/*:target/are
 
 In order to profile a specific benchmark using [`async-profiler`](https://github.com/async-profiler/async-profiler), first download and extract `async-profiler` and then use the following command (replace `/PATH/TO/async-profiler` with the path you extracted `async-profiler` to):
 ```java
-java -cp target/classes:target/test-classes:target/all-dependencies/*:target/arebac-neo4j-0.0.1-SNAPSHOT.jar io.github.danthe1st.arebac.neo4j.tests.airbnb.AirbnbBenchmark.scenario1GetReviewsFromHostGPEval -f 1 -jvmArgs '-agentpath:/PATH/TO/async-profiler/lib/libasyncProfiler.so=start,event=cpu,file=profile.html'
+java -cp target/classes:target/test-classes:target/all-dependencies/*:target/arebac-neo4j-0.0.1-SNAPSHOT.jar org.openjdk.jmh.Main AirbnbBenchmark.scenario1GetReviewsFromHostGPEvalWithoutWeaving -prof 'async:libPath=/PATH/TO/async-profiler/lib/libasyncProfiler.so;output=flamegraph;dir=profile' -f 2
 ```
 
-This configures JMH to only use a single fork and attaches async-profiler to create a CPU flamegraph in a `profile.html` file. The above example runs the benchmarks specified in the `SOBenchmark` class.
+This configures JMH to only use only two forks and attaches async-profiler to create a CPU flamegraph in a `profile.html` file. The above example runs the benchmarks specified in the `SOBenchmark` class.

arebac-neo4j/src/test/java/io/github/danthe1st/arebac/neo4j/tests/airbnb/AirbnbBenchmark.java

@@ -27,7 +27,7 @@
 @Warmup(iterations = 4, time = 3, timeUnit = TimeUnit.SECONDS)
 @Measurement(iterations = 4, time = 3, timeUnit = TimeUnit.SECONDS)
 public class AirbnbBenchmark {
-	
+
 	@Benchmark
 	public void scenario1GetReviewsFromHostGPEvalWithWeaving(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -36,7 +36,7 @@ public void scenario1GetReviewsFromHostGPEvalWithWeaving(AirbnbState state, Blac
 			result.forEach(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario1GetReviewsFromHostGPEvalWithoutWeaving(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -45,7 +45,7 @@ public void scenario1GetReviewsFromHostGPEvalWithoutWeaving(AirbnbState state, B
 			result.forEach(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario1GetReviewsFromHostNeo4J(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -54,11 +54,11 @@ public void scenario1GetReviewsFromHostNeo4J(AirbnbState state, Blackhole bh) {
 					WHERE h.host_id="$hostId"
 					RETURN r1,r2
 					""", Map.of("hostId", state.hostPatternInfo.nextId()));
-			
+
 			result.forEachRemaining(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario1GetReviewsFromReviewerGPEvalWithWeaving(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -67,7 +67,7 @@ public void scenario1GetReviewsFromReviewerGPEvalWithWeaving(AirbnbState state,
 			result.forEach(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario1GetReviewsFromReviewerGPEvalWithoutWeaving(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -76,7 +76,7 @@ public void scenario1GetReviewsFromReviewerGPEvalWithoutWeaving(AirbnbState stat
 			result.forEach(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario1GetReviewsFromReviewerNeo4J(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -85,11 +85,11 @@ public void scenario1GetReviewsFromReviewerNeo4J(AirbnbState state, Blackhole bh
 					WHERE r.reviewer_id="REVIEWER_ID"
 					RETURN r
 					""", Map.of("hostId", state.reviewerPatternInfo.nextId()));
-			
+
 			result.forEachRemaining(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario2GPEvalWithWeaving(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -98,7 +98,7 @@ public void scenario2GPEvalWithWeaving(AirbnbState state, Blackhole bh) {
 			result.forEach(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario2GPEvalWithoutWeaving(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -107,7 +107,7 @@ public void scenario2GPEvalWithoutWeaving(AirbnbState state, Blackhole bh) {
 			result.forEach(bh::consume);
 		}
 	}
-	
+
 	@Benchmark
 	public void scenario2Neo4J(AirbnbState state, Blackhole bh) {
 		try(Transaction tx = state.database.beginTx()){
@@ -117,18 +117,18 @@ public void scenario2Neo4J(AirbnbState state, Blackhole bh) {
 					WHERE h.host_id = $hostId AND n.neighborhood_id = $neighborhoodId
 					RETURN l
 					""", Map.of("hostId", id.subjectId(), "neighborhoodId", id.neighborhoodId()));
-			
+
 			result.forEachRemaining(bh::consume);
 		}
 	}
-	
+
 	@State(Scope.Thread)
 	public static class AirbnbState {
 		private final GraphDatabaseService database;
 		private final PatternInfo<String> hostPatternInfo;
 		private final PatternInfo<String> reviewerPatternInfo;
 		private final PatternInfo<Scenario2Id> scenario2PatternInfo;
-		
+
 		public AirbnbState() {
 			try{
 				database = AirbnbSetup.getDatabase();
@@ -139,23 +139,23 @@ public AirbnbState() {
 				throw new RuntimeException("cannot initialize benchmark state", e);
 			}
 		}
-		
+
 		public PatternInfo<String> getHostPatternInfo() {
 			return hostPatternInfo;
 		}
-		
+
 		public PatternInfo<String> getReviewerPatternInfo() {
 			return reviewerPatternInfo;
 		}
-		
+
 	}
-	
+
 	private static class PatternInfo<T> {
 		private final List<T> ids;
 		private final Function<T, GraphPattern> patternGenerator;
 		private final List<GraphPattern> patterns;
 		private int currentIndex = 0;
-		
+
 		public PatternInfo(List<T> ids, Function<T, GraphPattern> patternGenerator) {
 			this.ids = ids;
 			this.patternGenerator = patternGenerator;
@@ -165,27 +165,27 @@ public PatternInfo(List<T> ids, Function<T, GraphPattern> patternGenerator) {
 			}
 			this.patterns = List.copyOf(patterns);
 		}
-		
+
 		public GraphPattern nextLoadedPattern() {
 			return patterns.get(nextIndex());
 		}
-		
+
 		public GraphPattern computeNextPattern() {
 			return patternGenerator.apply(nextId());
 		}
-		
+
 		public T nextId() {
 			return ids.get(nextIndex());
 		}
-		
+
 		private int nextIndex() {
 			int index = currentIndex;
 			currentIndex = (currentIndex + 1) % ids.size();
 			return index;
 		}
 	}
-	
+
 	private record Scenario2Id(String subjectId, String neighborhoodId) {
-		
+
 	}
 }