8215521: add microbenchmark to measure AccessController.getContext
Reviewed-by: redestad, alanb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/micro/org/openjdk/bench/java/security/GetContext.java Fri Oct 04 12:00:16 2019 -0400
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2014, 2019 Oracle and/or its affiliates. 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.java.security;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Benchmark measuring AccessController.getContext
+ */
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public abstract class GetContext {
+
+ public static class Top extends GetContext {
+
+ @Benchmark
+ public AccessControlContext testNonPriv() {
+ return AccessController.getContext();
+ }
+
+ @Benchmark
+ public AccessControlContext testPriv() {
+ PrivilegedAction<AccessControlContext> pa = () -> AccessController.getContext();
+ return AccessController.doPrivileged(pa);
+ }
+ }
+
+ public static class Deep extends GetContext {
+
+ @Param({"2", "50"})
+ int depth;
+
+ private AccessControlContext recurse(int depth) {
+ if (depth > 0) {
+ return recurse(depth - 1);
+ } else {
+ return AccessController.getContext();
+ }
+ }
+
+ @Benchmark
+ public AccessControlContext testNonPrivRecurse() {
+ return recurse(depth);
+ }
+
+ @Benchmark
+ public AccessControlContext testPrivInline() {
+ PrivilegedAction<AccessControlContext> pa = () -> recurse(depth);
+ return AccessController.doPrivileged(pa);
+ }
+ }
+}