8276054: JMH benchmarks for Fences

Reviewed-by: redestad

test/micro/org/openjdk/bench/vm/fences/Multiple.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package org.openjdk.bench.vm.fences;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.lang.invoke.VarHandle;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(3)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+public class Multiple {
+
+    @Benchmark
+    public void plain() {
+        // Do nothing
+    }
+
+    @Benchmark
+    public void loadLoad() {
+        VarHandle.loadLoadFence();
+        VarHandle.loadLoadFence();
+        VarHandle.loadLoadFence();
+        VarHandle.loadLoadFence();
+    }
+
+    @Benchmark
+    public void storeStore() {
+        VarHandle.storeStoreFence();
+        VarHandle.storeStoreFence();
+        VarHandle.storeStoreFence();
+        VarHandle.storeStoreFence();
+    }
+
+    @Benchmark
+    public void acquire() {
+        VarHandle.acquireFence();
+        VarHandle.acquireFence();
+        VarHandle.acquireFence();
+        VarHandle.acquireFence();
+    }
+
+    @Benchmark
+    public void release() {
+        VarHandle.releaseFence();
+        VarHandle.releaseFence();
+        VarHandle.releaseFence();
+        VarHandle.releaseFence();
+    }
+
+    @Benchmark
+    public void full() {
+        VarHandle.fullFence();
+        VarHandle.fullFence();
+        VarHandle.fullFence();
+        VarHandle.fullFence();
+    }
+
+}

test/micro/org/openjdk/bench/vm/fences/MultipleWithLoads.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package org.openjdk.bench.vm.fences;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.lang.invoke.VarHandle;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(3)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class MultipleWithLoads {
+
+    int x, y, z;
+
+    @Benchmark
+    public int plain() {
+        int t1 = x + y + z;
+        int t2 = x + y + z;
+        int t3 = x + y + z;
+        return t1 + t2 + t3;
+    }
+
+    @Benchmark
+    public int loadLoad() {
+        VarHandle.loadLoadFence();
+        int t1 = x + y + z;
+        VarHandle.loadLoadFence();
+        int t2 = x + y + z;
+        VarHandle.loadLoadFence();
+        int t3 = x + y + z;
+        VarHandle.loadLoadFence();
+        return t1 + t2 + t3;
+    }
+
+    @Benchmark
+    public int storeStore() {
+        VarHandle.storeStoreFence();
+        int t1 = x + y + z;
+        VarHandle.storeStoreFence();
+        int t2 = x + y + z;
+        VarHandle.storeStoreFence();
+        int t3 = x + y + z;
+        VarHandle.storeStoreFence();
+        return t1 + t2 + t3;
+    }
+
+    @Benchmark
+    public int acquire() {
+        VarHandle.acquireFence();
+        int t1 = x + y + z;
+        VarHandle.acquireFence();
+        int t2 = x + y + z;
+        VarHandle.acquireFence();
+        int t3 = x + y + z;
+        VarHandle.acquireFence();
+        return t1 + t2 + t3;
+    }
+
+    @Benchmark
+    public int release() {
+        VarHandle.releaseFence();
+        int t1 = x + y + z;
+        VarHandle.releaseFence();
+        int t2 = x + y + z;
+        VarHandle.releaseFence();
+        int t3 = x + y + z;
+        VarHandle.releaseFence();
+        return t1 + t2 + t3;
+    }
+
+    @Benchmark
+    public int full() {
+        VarHandle.fullFence();
+        int t1 = x + y + z;
+        VarHandle.fullFence();
+        int t2 = x + y + z;
+        VarHandle.fullFence();
+        int t3 = x + y + z;
+        VarHandle.fullFence();
+        return t1 + t2 + t3;
+    }
+
+}

test/micro/org/openjdk/bench/vm/fences/MultipleWithStores.java

@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package org.openjdk.bench.vm.fences;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.lang.invoke.VarHandle;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(3)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class MultipleWithStores {
+
+    int x, y, z;
+
+    @Benchmark
+    public void plain() {
+        x = 1;
+        y = 1;
+        z = 1;
+    }
+
+    @Benchmark
+    public void loadLoad() {
+        VarHandle.loadLoadFence();
+        x = 1;
+        VarHandle.loadLoadFence();
+        y = 1;
+        VarHandle.loadLoadFence();
+        z = 1;
+        VarHandle.loadLoadFence();
+    }
+
+    @Benchmark
+    public void storeStore() {
+        VarHandle.storeStoreFence();
+        x = 1;
+        VarHandle.storeStoreFence();
+        y = 1;
+        VarHandle.storeStoreFence();
+        z = 1;
+        VarHandle.storeStoreFence();
+    }
+
+    @Benchmark
+    public void acquire() {
+        VarHandle.releaseFence();
+        x = 1;
+        VarHandle.releaseFence();
+        y = 1;
+        VarHandle.releaseFence();
+        z = 1;
+        VarHandle.releaseFence();
+    }
+
+    @Benchmark
+    public void release() {
+        VarHandle.releaseFence();
+        x = 1;
+        VarHandle.releaseFence();
+        y = 1;
+        VarHandle.releaseFence();
+        z = 1;
+        VarHandle.releaseFence();
+    }
+
+    @Benchmark
+    public void full() {
+        VarHandle.fullFence();
+        x = 1;
+        VarHandle.fullFence();
+        y = 1;
+        VarHandle.fullFence();
+        z = 1;
+        VarHandle.fullFence();
+    }
+
+}

test/micro/org/openjdk/bench/vm/fences/SafePublishing.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package org.openjdk.bench.vm.fences;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.lang.invoke.VarHandle;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(value = 3, jvmArgsAppend = {"-XX:+UseParallelGC", "-Xmx128m"})
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class SafePublishing {
+
+    @Benchmark
+    public Object plain() {
+        return new Plain();
+    }
+
+    @Benchmark
+    public Object release() {
+        return new Release();
+    }
+
+    @Benchmark
+    public Object storeStore() {
+        return new StoreStore();
+    }
+
+    static class Plain {
+        int x;
+        public Plain() {
+            x = 1;
+            VarHandle.releaseFence();
+        }
+    }
+
+    static class Release {
+        int x;
+        public Release() {
+            x = 1;
+            VarHandle.releaseFence();
+        }
+    }
+
+    static class StoreStore {
+        int x;
+        public StoreStore() {
+            x = 1;
+            VarHandle.storeStoreFence();
+        }
+    }
+
+}

test/micro/org/openjdk/bench/vm/fences/Single.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package org.openjdk.bench.vm.fences;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.lang.invoke.VarHandle;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(3)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+public class Single {
+
+    @Benchmark
+    public void plain() {
+        // Do nothing
+    }
+
+    @Benchmark
+    public void loadLoad() {
+        VarHandle.loadLoadFence();
+    }
+
+    @Benchmark
+    public void storeStore() {
+        VarHandle.storeStoreFence();
+    }
+
+    @Benchmark
+    public void acquire() {
+        VarHandle.acquireFence();
+    }
+
+    @Benchmark
+    public void release() {
+        VarHandle.releaseFence();
+    }
+
+    @Benchmark
+    public void full() {
+        VarHandle.fullFence();
+    }
+
+}