# HG changeset patch
# User shade
# Date 1483618358 -3600
# Node ID 4016779f803c92e9bd1ece683242e40f84ea69f0
# Parent  04bf515935c1502a8bbccdf6e5aaace49d330109
A bit more WIP work.

diff -r 04bf515935c1 -r 4016779f803c src/main/java/org/openjdk/gcbench/wip/ReadBarriersCountedLoop.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/openjdk/gcbench/wip/ReadBarriersCountedLoop.java	Thu Jan 05 13:12:38 2017 +0100
@@ -0,0 +1,41 @@
+package org.openjdk.gcbench.wip;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.WeakReference;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(1)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Threads(1)
+@State(Scope.Benchmark)
+public class ReadBarriersCountedLoop {
+
+    @Param({"1", "10", "100", "1000", "10000"})
+    int count;
+
+    byte[] x;
+
+    @Setup
+    public void setup() {
+        x = new byte[count];
+        for (int c = 0; c < count; c++) {
+            x[c] = 42;
+        }
+    }
+
+    @Benchmark
+    public int test() {
+        int r = 0;
+        for (int c = 0; c < count; c++) {
+            r += x[c];
+        }
+        return r;
+    }
+
+}
diff -r 04bf515935c1 -r 4016779f803c src/main/java/org/openjdk/gcbench/wip/ReadWriteBarrierMerge.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/openjdk/gcbench/wip/ReadWriteBarrierMerge.java	Thu Jan 05 13:12:38 2017 +0100
@@ -0,0 +1,24 @@
+package org.openjdk.gcbench.wip;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(1)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Threads(1)
+@State(Scope.Benchmark)
+public class ReadWriteBarrierMerge {
+
+    double x;
+
+    @Benchmark
+    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
+    public void test() {
+        x++;
+    }
+
+}