Backport PR #16564 to 8.x: Adds a JMH benchmark to test BufferedToken…

…izerExt class(#16570)

Adds a JMH benchmark to measure the peformances of BufferedTokenizerExt.
Update also Gradle build script to remove CMS GC flags and fix deprecations for Gradle 9.0.

Co-authored-by: João Duarte <[email protected]>
(cherry picked from commit b6f16c8)

Co-authored-by: Andrea Selva <[email protected]>

logstash-core/benchmarks/build.gradle

@@ -50,7 +50,7 @@ jar {
 }
 
 ext {
-  jmh = 1.22
+  jmh = 1.37
 }
 
 dependencies {
@@ -79,17 +79,15 @@ tasks.register("jmh", JavaExec) {
 
  dependsOn=[':logstash-core-benchmarks:clean', ':logstash-core-benchmarks:shadowJar']
 
-  main = "-jar"
+  mainClass = "-jar"
 
   def include = project.properties.get('include', '')
 
   doFirst {
     args = [
             "-Djava.io.tmpdir=${buildDir.absolutePath}",
-            "-XX:+UseConcMarkSweepGC", "-XX:CMSInitiatingOccupancyFraction=75",
-            "-XX:+UseCMSInitiatingOccupancyOnly", "-XX:+DisableExplicitGC",
             "-XX:+HeapDumpOnOutOfMemoryError", "-Xms2g", "-Xmx2g",
-            shadowJar.archivePath,
+            shadowJar.archiveFile.get().asFile,
             include
     ]
   }

logstash-core/benchmarks/src/main/java/org/logstash/benchmark/BufferedTokenizerExtBenchmark.java

@@ -0,0 +1,84 @@
+package org.logstash.benchmark;
+
+import org.jruby.RubyArray;
+import org.jruby.RubyString;
+import org.jruby.runtime.ThreadContext;
+import org.jruby.runtime.builtin.IRubyObject;
+import org.logstash.RubyUtil;
+import org.logstash.common.BufferedTokenizerExt;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Level;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OperationsPerInvocation;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.concurrent.TimeUnit;
+
+import static org.logstash.RubyUtil.RUBY;
+
+@Warmup(iterations = 3, time = 100, timeUnit = TimeUnit.MILLISECONDS)
+@Measurement(iterations = 10, time = 100, timeUnit = TimeUnit.MILLISECONDS)
+@Fork(1)
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class BufferedTokenizerExtBenchmark {
+
+    private BufferedTokenizerExt sut;
+    private ThreadContext context;
+    private RubyString singleTokenPerFragment;
+    private RubyString multipleTokensPerFragment;
+    private RubyString multipleTokensSpreadMultipleFragments_1;
+    private RubyString multipleTokensSpreadMultipleFragments_2;
+    private RubyString multipleTokensSpreadMultipleFragments_3;
+
+    @Setup(Level.Invocation)
+    public void setUp() {
+        sut = new BufferedTokenizerExt(RubyUtil.RUBY, RubyUtil.BUFFERED_TOKENIZER);
+        context = RUBY.getCurrentContext();
+        IRubyObject[] args = {};
+        sut.init(context, args);
+        singleTokenPerFragment = RubyUtil.RUBY.newString("a".repeat(512) + "\n");
+
+        multipleTokensPerFragment = RubyUtil.RUBY.newString("a".repeat(512) + "\n" + "b".repeat(512) + "\n" + "c".repeat(512) + "\n");
+
+        multipleTokensSpreadMultipleFragments_1 = RubyUtil.RUBY.newString("a".repeat(512) + "\n" + "b".repeat(512) + "\n" + "c".repeat(256));
+        multipleTokensSpreadMultipleFragments_2 = RubyUtil.RUBY.newString("c".repeat(256) + "\n" + "d".repeat(512) + "\n" + "e".repeat(256));
+        multipleTokensSpreadMultipleFragments_3 = RubyUtil.RUBY.newString("f".repeat(256) + "\n" + "g".repeat(512) + "\n" + "h".repeat(512) + "\n");
+    }
+
+    @SuppressWarnings("unchecked")
+    @Benchmark
+    public final void onlyOneTokenPerFragment(Blackhole blackhole) {
+        RubyArray<RubyString> tokens = (RubyArray<RubyString>) sut.extract(context, singleTokenPerFragment);
+        blackhole.consume(tokens);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Benchmark
+    public final void multipleTokenPerFragment(Blackhole blackhole) {
+        RubyArray<RubyString> tokens = (RubyArray<RubyString>) sut.extract(context, multipleTokensPerFragment);
+        blackhole.consume(tokens);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Benchmark
+    public final void multipleTokensCrossingMultipleFragments(Blackhole blackhole) {
+        RubyArray<RubyString> tokens = (RubyArray<RubyString>) sut.extract(context, multipleTokensSpreadMultipleFragments_1);
+        blackhole.consume(tokens);
+
+        tokens = (RubyArray<RubyString>) sut.extract(context, multipleTokensSpreadMultipleFragments_2);
+        blackhole.consume(tokens);
+
+        tokens = (RubyArray<RubyString>) sut.extract(context, multipleTokensSpreadMultipleFragments_3);
+        blackhole.consume(tokens);
+    }
+}