changeset 49:a7e36b1ee004

Nanotime infrastructure benchmark.
author shade
date Tue, 28 May 2013 14:57:12 +0400
parents 7bdc65de6416
children 22a3ab176f42
files jmh-core-benchmarks/src/main/java/org/openjdk/jmh/benchmarks/InvocationBench.java jmh-core-benchmarks/src/main/java/org/openjdk/jmh/benchmarks/NanotimeBench.java
diffstat 2 files changed, 59 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/jmh-core-benchmarks/src/main/java/org/openjdk/jmh/benchmarks/InvocationBench.java	Tue May 28 13:36:18 2013 +0400
+++ b/jmh-core-benchmarks/src/main/java/org/openjdk/jmh/benchmarks/InvocationBench.java	Tue May 28 14:57:12 2013 +0400
@@ -90,13 +90,13 @@
 
     @GenerateMicroBenchmark(BenchmarkType.AverageTimePerOp)
     @OutputTimeUnit(TimeUnit.NANOSECONDS)
-    public void group(BenchmarkSetupTeardown g) {
+    public void group(GroupSetupTeardown g) {
         // do nothing
     }
 
     @GenerateMicroBenchmark(BenchmarkType.AverageTimePerOp)
     @OutputTimeUnit(TimeUnit.NANOSECONDS)
-    public void thread(BenchmarkSetupTeardown g) {
+    public void thread(ThreadSetupTeardown g) {
         // do nothing
     }
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jmh-core-benchmarks/src/main/java/org/openjdk/jmh/benchmarks/NanotimeBench.java	Tue May 28 14:57:12 2013 +0400
@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) 2005, 2013, 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.jmh.benchmarks;
+
+import org.openjdk.jmh.annotations.BenchmarkType;
+import org.openjdk.jmh.annotations.GenerateMicroBenchmark;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+
+import java.util.concurrent.TimeUnit;
+
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class NanotimeBench {
+
+    private long last;
+
+    @GenerateMicroBenchmark(BenchmarkType.AverageTimePerOp)
+    public long latency() {
+        return System.nanoTime();
+    }
+
+    @GenerateMicroBenchmark(BenchmarkType.SampleTimePerOp)
+    public long granularity() {
+        long lst = last;
+        long cur;
+        do {
+            cur = System.nanoTime();
+        } while (cur == lst);
+        last = cur;
+        return cur;
+    }
+
+}