Get the benchmarks running again

pom.xml

@@ -347,5 +347,11 @@
       <version>1.26</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.openjdk.jmh</groupId>
+      <artifactId>jmh-generator-annprocess</artifactId>
+      <version>1.26</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 </project>

src/test/java/io/netty/buffer/b2/MemSegBufAccessBenchmark.java

@@ -75,6 +75,7 @@ public class MemSegBufAccessBenchmark {
     @Setup
     public void setup() {
         buffer = bufferType.newBuffer();
+        buffer.writerOffset(batchSize);
     }
 
     private Buf buffer;