6878481: Add performance counters in the JDK

Added new performance counters in the JDK to track performance metrics

Reviewed-by: alanb, dholmes, iris, forax, andrew

jdk/make/java/java/FILES_java.gmk

@@ -454,6 +454,8 @@ JAVA_JAVA_java = \
     sun/misc/JavaLangAccess.java \
     sun/misc/JavaIOAccess.java \
     sun/misc/JavaIOFileDescriptorAccess.java \
-    sun/misc/JavaNioAccess.java
+    sun/misc/JavaNioAccess.java \
+    sun/misc/Perf.java \
+    sun/misc/PerfCounter.java
 
 FILES_java = $(JAVA_JAVA_java)

jdk/src/share/classes/java/lang/ClassLoader.java

@@ -380,6 +380,7 @@ public abstract class ClassLoader {
             // First, check if the class has already been loaded
             Class c = findLoadedClass(name);
             if (c == null) {
+                long t0 = System.nanoTime();
                 try {
                     if (parent != null) {
                         c = parent.loadClass(name, false);
@@ -394,7 +395,13 @@ public abstract class ClassLoader {
                 if (c == null) {
                     // If still not found, then invoke findClass in order
                     // to find the class.
+                    long t1 = System.nanoTime();
                     c = findClass(name);
+
+                    // this is the defining class loader; record the stats
+                    sun.misc.PerfCounter.getParentDelegationTime().addTime(t1 - t0);
+                    sun.misc.PerfCounter.getFindClassTime().addElapsedTimeFrom(t1);
+                    sun.misc.PerfCounter.getFindClasses().increment();
                 }
             }
             if (resolve) {

jdk/src/share/classes/java/net/URLClassLoader.java

@@ -340,6 +340,7 @@ public class URLClassLoader extends SecureClassLoader implements Closeable {
      * used.
      */
     private Class defineClass(String name, Resource res) throws IOException {
+        long t0 = System.nanoTime();
         int i = name.lastIndexOf('.');
         URL url = res.getCodeSourceURL();
         if (i != -1) {
@@ -370,12 +371,14 @@ public class URLClassLoader extends SecureClassLoader implements Closeable {
             // Use (direct) ByteBuffer:
             CodeSigner[] signers = res.getCodeSigners();
             CodeSource cs = new CodeSource(url, signers);
+            sun.misc.PerfCounter.getReadClassBytesTime().addElapsedTimeFrom(t0);
             return defineClass(name, bb, cs);
         } else {
             byte[] b = res.getBytes();
             // must read certificates AFTER reading bytes.
             CodeSigner[] signers = res.getCodeSigners();
             CodeSource cs = new CodeSource(url, signers);
+            sun.misc.PerfCounter.getReadClassBytesTime().addElapsedTimeFrom(t0);
             return defineClass(name, b, 0, b.length, cs);
         }
     }

jdk/src/share/classes/java/util/zip/ZipFile.java

@@ -195,7 +195,10 @@ class ZipFile implements ZipConstants, Closeable {
         if (charset == null)
             throw new NullPointerException("charset is null");
         this.zc = ZipCoder.get(charset);
+        long t0 = System.nanoTime();
         jzfile = open(name, mode, file.lastModified());
+        sun.misc.PerfCounter.getZipFileOpenTime().addElapsedTimeFrom(t0);
+        sun.misc.PerfCounter.getZipFileCount().increment();
         this.name = name;
         this.total = getTotal(jzfile);
     }

jdk/src/share/classes/sun/misc/PerfCounter.java

@@ -0,0 +1,191 @@
+/*
+ * Copyright 2009 Sun Microsystems, 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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.misc;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.LongBuffer;
+import java.security.AccessController;
+
+/**
+ * Performance counter support for internal JRE classes.
+ * This class defines a fixed list of counters for the platform
+ * to use as an interim solution until RFE# 6209222 is implemented.
+ * The perf counters will be created in the jvmstat perf buffer
+ * that the HotSpot VM creates. The default size is 32K and thus
+ * the number of counters is bounded.  You can alter the size
+ * with -XX:PerfDataMemorySize=<bytes> option. If there is
+ * insufficient memory in the jvmstat perf buffer, the C heap memory
+ * will be used and thus the application will continue to run if
+ * the counters added exceeds the buffer size but the counters
+ * will be missing.
+ *
+ * See HotSpot jvmstat implementation for certain circumstances
+ * that the jvmstat perf buffer is not supported.
+ *
+ */
+public class PerfCounter {
+    private static final Perf perf =
+        AccessController.doPrivileged(new Perf.GetPerfAction());
+
+    // Must match values defined in hotspot/src/share/vm/runtime/perfdata.hpp
+    private final static int V_Constant  = 1;
+    private final static int V_Monotonic = 2;
+    private final static int V_Variable  = 3;
+    private final static int U_None      = 1;
+
+    private final String name;
+    private final LongBuffer lb;
+
+    private PerfCounter(String name, int type) {
+        this.name = name;
+        ByteBuffer bb = perf.createLong(name, U_None, type, 0L);
+        bb.order(ByteOrder.nativeOrder());
+        this.lb = bb.asLongBuffer();
+    }
+
+    static PerfCounter newPerfCounter(String name) {
+        return new PerfCounter(name, V_Variable);
+    }
+
+    static PerfCounter newConstantPerfCounter(String name) {
+        PerfCounter c = new PerfCounter(name, V_Constant);
+        return c;
+    }
+
+    /**
+     * Returns the current value of the perf counter.
+     */
+    public synchronized long get() {
+        return lb.get(0);
+    }
+
+    /**
+     * Sets the value of the perf counter to the given newValue.
+     */
+    public synchronized void set(long newValue) {
+        lb.put(0, newValue);
+    }
+
+    /**
+     * Adds the given value to the perf counter.
+     */
+    public synchronized void add(long value) {
+        long res = get() + value;
+        lb.put(0, res);
+    }
+
+    /**
+     * Increments the perf counter with 1.
+     */
+    public void increment() {
+        add(1);
+    }
+
+    /**
+     * Adds the given interval to the perf counter.
+     */
+    public void addTime(long interval) {
+        add(interval);
+    }
+
+    /**
+     * Adds the elapsed time from the given start time (ns) to the perf counter.
+     */
+    public void addElapsedTimeFrom(long startTime) {
+        add(System.nanoTime() - startTime);
+    }
+
+    @Override
+    public String toString() {
+        return name + " = " + get();
+    }
+
+    static class CoreCounters {
+        static final PerfCounter pdt   = newPerfCounter("sun.classloader.parentDelegationTime");
+        static final PerfCounter lc    = newPerfCounter("sun.classloader.findClasses");
+        static final PerfCounter lct   = newPerfCounter("sun.classloader.findClassTime");
+        static final PerfCounter rcbt  = newPerfCounter("sun.urlClassLoader.readClassBytesTime");
+        static final PerfCounter zfc   = newPerfCounter("sun.zip.zipFiles");
+        static final PerfCounter zfot  = newPerfCounter("sun.zip.zipFile.openTime");
+    }
+
+    static class WindowsClientCounters {
+        static final PerfCounter d3dAvailable = newConstantPerfCounter("sun.java2d.d3d.available");
+    }
+
+    /**
+     * Number of findClass calls
+     */
+    public static PerfCounter getFindClasses() {
+        return CoreCounters.lc;
+    }
+
+    /**
+     * Time (ns) spent in finding classes that includes
+     * lookup and read class bytes and defineClass
+     */
+    public static PerfCounter getFindClassTime() {
+        return CoreCounters.lct;
+    }
+
+    /**
+     * Time (ns) spent in finding classes
+     */
+    public static PerfCounter getReadClassBytesTime() {
+        return CoreCounters.rcbt;
+    }
+
+    /**
+     * Time (ns) spent in the parent delegation to
+     * the parent of the defining class loader
+     */
+    public static PerfCounter getParentDelegationTime() {
+        return CoreCounters.pdt;
+    }
+
+    /**
+     * Number of zip files opened.
+     */
+    public static PerfCounter getZipFileCount() {
+        return CoreCounters.zfc;
+    }
+
+    /**
+     * Time (ns) spent in opening the zip files that
+     * includes building the entries hash table
+     */
+    public static PerfCounter getZipFileOpenTime() {
+        return CoreCounters.zfot;
+    }
+
+    /**
+     * D3D graphic pipeline available
+     */
+    public static PerfCounter getD3DAvailable() {
+        return WindowsClientCounters.d3dAvailable;
+    }
+}

jdk/src/windows/classes/sun/java2d/d3d/D3DGraphicsDevice.java

@@ -67,6 +67,9 @@ public class D3DGraphicsDevice extends Win32GraphicsDevice {
         if (d3dAvailable) {
             // we don't use pixel formats for the d3d pipeline
             pfDisabled = true;
+            sun.misc.PerfCounter.getD3DAvailable().set(1);
+        } else {
+            sun.misc.PerfCounter.getD3DAvailable().set(0);
         }
     }