svn commit: r1615280 - /logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java

[rp...@apache.org]

Author: rpopma
Date: Sat Aug  2 02:39:49 2014
New Revision: 1615280

URL: http://svn.apache.org/r1615280
Log:
Added clock benchmarks.

Added:
    logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java   (with props)

Added: logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java
URL: http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java?rev=1615280&view=auto
==============================================================================
--- logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java (added)
+++ logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java Sat Aug  2 02:39:49 2014
@@ -0,0 +1,139 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache license, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the license for the specific language governing permissions and
+ * limitations under the license.
+ */
+
+package org.apache.logging.log4j.perf.jmh;
+
+import java.util.concurrent.TimeUnit;
+
+import org.apache.logging.log4j.core.util.CachedClock;
+import org.apache.logging.log4j.core.util.Clock;
+import org.apache.logging.log4j.core.util.CoarseCachedClock;
+import org.apache.logging.log4j.core.util.SystemClock;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.GenerateMicroBenchmark;
+import org.openjdk.jmh.annotations.Level;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+
+/**
+ * Tests performance of various clock implementation.
+ */
+// ============================== HOW TO RUN THIS TEST: ====================================
+//
+// single thread:
+// java -jar log4j-perf/target/microbenchmarks.jar ".*Clocks.*" -f 1 -wi 5 -i 5
+//
+// multiple threads (for example, 4 threads):
+// java -jar log4j-perf/target/microbenchmarks.jar ".*Clocks.*" -f 1 -wi 5 -i 5 -t 4 -si true
+//
+// Usage help:
+// java -jar log4j-perf/target/microbenchmarks.jar -help
+//
+@State(Scope.Thread)
+public class ClocksBenchmark {
+
+    Clock systemClock = new SystemClock();
+    Clock cachedClock;
+    Clock coarseCachedClock;
+    Clock fixedClock;
+    Clock fixedFinalClock;
+
+    @Setup(Level.Trial)
+    public void up() {
+        cachedClock = CachedClock.instance();
+        coarseCachedClock = CoarseCachedClock.instance();
+        fixedClock = new FixedTimeClock(System.nanoTime());
+        fixedFinalClock = new FixedFinalTimeClock(System.nanoTime());
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public void baseline() {
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public long langSystemCurrentTimeMillis() {
+        return System.currentTimeMillis();
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public long systemClock() {
+        return systemClock.currentTimeMillis();
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public long cachedClock() {
+        return cachedClock.currentTimeMillis();
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public long coarseCachedClock() {
+        return coarseCachedClock.currentTimeMillis();
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public long fixedClock() {
+        return fixedClock.currentTimeMillis();
+    }
+
+    @GenerateMicroBenchmark
+    @BenchmarkMode(Mode.SampleTime)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    public long fixedFinalClock() {
+        return fixedFinalClock.currentTimeMillis();
+    }
+
+    private static final class FixedTimeClock implements Clock {
+        private long fixedTime;
+
+        public FixedTimeClock(long fixedTime) {
+            this.fixedTime = fixedTime;
+        }
+
+        @Override
+        public long currentTimeMillis() {
+            return fixedTime;
+        }
+    }
+
+    private static final class FixedFinalTimeClock implements Clock {
+        private final long fixedFinalTime;
+
+        public FixedFinalTimeClock(long fixedTime) {
+            this.fixedFinalTime = fixedTime;
+        }
+
+        @Override
+        public long currentTimeMillis() {
+            return fixedFinalTime;
+        }
+    }
+}

Propchange: logging/log4j/log4j2/trunk/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/ClocksBenchmark.java
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