- * To automatically track startup performance in an app or applet,
- * use the command-line parameter sun.perflog as follows:
- *
}" will cause
- * that given filename to be created and used for all output.
- *
- * By default, times are measured using System.currentTimeMillis(). To use
- * System.nanoTime() instead, add the command-line parameter:
- -Dsun.perflog.nano=true
- *
- *
- * Warning: Use at your own risk!
- * This class is intended for internal testing
- * purposes only and may be removed at any time. More
- * permanent monitoring and profiling APIs are expected to be
- * developed for future releases and this class will cease to
- * exist once those APIs are in place.
- * @author Chet Haase
- */
-public class PerformanceLogger {
-
- // Timing values of global interest
- private static final int START_INDEX = 0; // VM start
- private static final int LAST_RESERVED = START_INDEX;
-
- private static boolean perfLoggingOn = false;
- private static boolean useNanoTime = false;
- private static Vector times;
- private static String logFileName = null;
- private static Writer logWriter = null;
- private static long baseTime;
-
- static {
- String perfLoggingProp =
- java.security.AccessController.doPrivileged(
- new sun.security.action.GetPropertyAction("sun.perflog"));
- if (perfLoggingProp != null) {
- perfLoggingOn = true;
-
- // Check if we should use nanoTime
- String perfNanoProp =
- java.security.AccessController.doPrivileged(
- new sun.security.action.GetPropertyAction("sun.perflog.nano"));
- if (perfNanoProp != null) {
- useNanoTime = true;
- }
-
- // Now, figure out what the user wants to do with the data
- if (perfLoggingProp.regionMatches(true, 0, "file:", 0, 5)) {
- logFileName = perfLoggingProp.substring(5);
- }
- if (logFileName != null) {
- if (logWriter == null) {
- java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction() {
- public Void run() {
- try {
- File logFile = new File(logFileName);
- logFile.createNewFile();
- logWriter = new FileWriter(logFile);
- } catch (Exception e) {
- System.out.println(e + ": Creating logfile " +
- logFileName +
- ". Log to console");
- }
- return null;
- }
- });
- }
- }
- if (logWriter == null) {
- logWriter = new OutputStreamWriter(System.out);
- }
- }
- times = new Vector(10);
- // Reserve predefined slots
- for (int i = 0; i <= LAST_RESERVED; ++i) {
- times.add(new TimeData("Time " + i + " not set", 0));
- }
- }
-
- /**
- * Returns status of whether logging is enabled or not. This is
- * provided as a convenience method so that users do not have to
- * perform the same GetPropertyAction check as above to determine whether
- * to enable performance logging.
- */
- public static boolean loggingEnabled() {
- return perfLoggingOn;
- }
-
-
- /**
- * Internal class used to store time/message data together.
- */
- static class TimeData {
- String message;
- long time;
-
- TimeData(String message, long time) {
- this.message = message;
- this.time = time;
- }
-
- String getMessage() {
- return message;
- }
-
- long getTime() {
- return time;
- }
- }
-
- /**
- * Return the current time, in millis or nanos as appropriate
- */
- private static long getCurrentTime() {
- if (useNanoTime) {
- return System.nanoTime();
- } else {
- return System.currentTimeMillis();
- }
- }
-
- /**
- * Sets the start time. Ideally, this is the earliest time available
- * during the startup of a Java applet or application. This time is
- * later used to analyze the difference between the initial startup
- * time and other events in the system (such as an applet's init time).
- */
- public static void setStartTime(String message) {
- if (loggingEnabled()) {
- long nowTime = getCurrentTime();
- setStartTime(message, nowTime);
- }
- }
-
- /**
- * Sets the base time, output can then
- * be displayed as offsets from the base time;.
- */
- public static void setBaseTime(long time) {
- if (loggingEnabled()) {
- baseTime = time;
- }
- }
-
- /**
- * Sets the start time.
- * This version of the method is
- * given the time to log, instead of expecting this method to
- * get the time itself. This is done in case the time was
- * recorded much earlier than this method was called.
- */
- public static void setStartTime(String message, long time) {
- if (loggingEnabled()) {
- times.set(START_INDEX, new TimeData(message, time));
- }
- }
-
- /**
- * Gets the start time, which should be the time when
- * the java process started, prior to the VM actually being
- * loaded.
- */
- public static long getStartTime() {
- if (loggingEnabled()) {
- return times.get(START_INDEX).getTime();
- } else {
- return 0;
- }
- }
-
- /**
- * Sets the value of a given time and returns the index of the
- * slot that that time was stored in.
- */
- public static int setTime(String message) {
- if (loggingEnabled()) {
- long nowTime = getCurrentTime();
- return setTime(message, nowTime);
- } else {
- return 0;
- }
- }
-
- /**
- * Sets the value of a given time and returns the index of the
- * slot that that time was stored in.
- * This version of the method is
- * given the time to log, instead of expecting this method to
- * get the time itself. This is done in case the time was
- * recorded much earlier than this method was called.
- */
- public static int setTime(String message, long time) {
- if (loggingEnabled()) {
- // times is already synchronized, but we need to ensure that
- // the size used in times.set() is the same used when returning
- // the index of that operation.
- synchronized (times) {
- times.add(new TimeData(message, time));
- return (times.size() - 1);
- }
- } else {
- return 0;
- }
- }
-
- /**
- * Returns time at given index.
- */
- public static long getTimeAtIndex(int index) {
- if (loggingEnabled()) {
- return times.get(index).getTime();
- } else {
- return 0;
- }
- }
-
- /**
- * Returns message at given index.
- */
- public static String getMessageAtIndex(int index) {
- if (loggingEnabled()) {
- return times.get(index).getMessage();
- } else {
- return null;
- }
- }
-
- /**
- * Outputs all data to parameter-specified Writer object
- */
- public static void outputLog(Writer writer) {
- if (loggingEnabled()) {
- try {
- synchronized(times) {
- for (int i = 0; i < times.size(); ++i) {
- TimeData td = times.get(i);
- if (td != null) {
- writer.write(i + " " + td.getMessage() + ": " +
- (td.getTime() - baseTime) + "\n");
-
- }
- }
- }
- writer.flush();
- } catch (Exception e) {
- System.out.println(e + ": Writing performance log to " +
- writer);
- }
- }
- }
-
- /**
- * Outputs all data to whatever location the user specified
- * via sun.perflog command-line parameter.
- */
- public static void outputLog() {
- outputLog(logWriter);
- }
-}
--- /dev/null 2015-10-21 15:25:26.827416476 +0100
+++ new/src/java.base/share/classes/jdk/internal/perf/PerformanceLogger.java 2016-01-08 18:52:08.005315009 +0000
@@ -0,0 +1,317 @@
+/*
+ * Copyright (c) 2002, 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 jdk.internal.perf;
+
+import java.util.Vector;
+import java.io.FileWriter;
+import java.io.File;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+
+/**
+ * This class is intended to be a central place for the jdk to
+ * log timing events of interest. There is pre-defined event
+ * of startTime, as well as a general
+ * mechanism of setting arbitrary times in an array.
+ * All unreserved times in the array can be used by callers
+ * in application-defined situations. The caller is responsible
+ * for setting and getting all times and for doing whatever
+ * analysis is interesting; this class is merely a central container
+ * for those timing values.
+ * Note that, due to the variables in this class being static,
+ * use of particular time values by multiple applets will cause
+ * confusing results. For example, if plugin runs two applets
+ * simultaneously, the initTime for those applets will collide
+ * and the results may be undefined.
+ *
+ * To automatically track startup performance in an app or applet,
+ * use the command-line parameter sun.perflog as follows:
+ *
{@code
+ * -Dsun.perflog[=file:]
+ * }
+ *
+ * where simply using the parameter with no value will enable output
+ * to the console and a value of "{@code file:}" will cause
+ * that given filename to be created and used for all output.
+ *
+ * By default, times are measured using System.currentTimeMillis(). To use
+ * System.nanoTime() instead, add the command-line parameter:
+ -Dsun.perflog.nano=true
+ *
+ *
+ * Warning: Use at your own risk!
+ * This class is intended for internal testing
+ * purposes only and may be removed at any time. More
+ * permanent monitoring and profiling APIs are expected to be
+ * developed for future releases and this class will cease to
+ * exist once those APIs are in place.
+ * @author Chet Haase
+ */
+public class PerformanceLogger {
+
+ // Timing values of global interest
+ private static final int START_INDEX = 0; // VM start
+ private static final int LAST_RESERVED = START_INDEX;
+
+ private static boolean perfLoggingOn = false;
+ private static boolean useNanoTime = false;
+ private static Vector times;
+ private static String logFileName = null;
+ private static Writer logWriter = null;
+ private static long baseTime;
+
+ static {
+ String perfLoggingProp =
+ java.security.AccessController.doPrivileged(
+ new sun.security.action.GetPropertyAction("sun.perflog"));
+ if (perfLoggingProp != null) {
+ perfLoggingOn = true;
+
+ // Check if we should use nanoTime
+ String perfNanoProp =
+ java.security.AccessController.doPrivileged(
+ new sun.security.action.GetPropertyAction("sun.perflog.nano"));
+ if (perfNanoProp != null) {
+ useNanoTime = true;
+ }
+
+ // Now, figure out what the user wants to do with the data
+ if (perfLoggingProp.regionMatches(true, 0, "file:", 0, 5)) {
+ logFileName = perfLoggingProp.substring(5);
+ }
+ if (logFileName != null) {
+ if (logWriter == null) {
+ java.security.AccessController.doPrivileged(
+ new java.security.PrivilegedAction() {
+ public Void run() {
+ try {
+ File logFile = new File(logFileName);
+ logFile.createNewFile();
+ logWriter = new FileWriter(logFile);
+ } catch (Exception e) {
+ System.out.println(e + ": Creating logfile " +
+ logFileName +
+ ". Log to console");
+ }
+ return null;
+ }
+ });
+ }
+ }
+ if (logWriter == null) {
+ logWriter = new OutputStreamWriter(System.out);
+ }
+ }
+ times = new Vector(10);
+ // Reserve predefined slots
+ for (int i = 0; i <= LAST_RESERVED; ++i) {
+ times.add(new TimeData("Time " + i + " not set", 0));
+ }
+ }
+
+ /**
+ * Returns status of whether logging is enabled or not. This is
+ * provided as a convenience method so that users do not have to
+ * perform the same GetPropertyAction check as above to determine whether
+ * to enable performance logging.
+ */
+ public static boolean loggingEnabled() {
+ return perfLoggingOn;
+ }
+
+
+ /**
+ * Internal class used to store time/message data together.
+ */
+ static class TimeData {
+ String message;
+ long time;
+
+ TimeData(String message, long time) {
+ this.message = message;
+ this.time = time;
+ }
+
+ String getMessage() {
+ return message;
+ }
+
+ long getTime() {
+ return time;
+ }
+ }
+
+ /**
+ * Return the current time, in millis or nanos as appropriate
+ */
+ private static long getCurrentTime() {
+ if (useNanoTime) {
+ return System.nanoTime();
+ } else {
+ return System.currentTimeMillis();
+ }
+ }
+
+ /**
+ * Sets the start time. Ideally, this is the earliest time available
+ * during the startup of a Java applet or application. This time is
+ * later used to analyze the difference between the initial startup
+ * time and other events in the system (such as an applet's init time).
+ */
+ public static void setStartTime(String message) {
+ if (loggingEnabled()) {
+ long nowTime = getCurrentTime();
+ setStartTime(message, nowTime);
+ }
+ }
+
+ /**
+ * Sets the base time, output can then
+ * be displayed as offsets from the base time;.
+ */
+ public static void setBaseTime(long time) {
+ if (loggingEnabled()) {
+ baseTime = time;
+ }
+ }
+
+ /**
+ * Sets the start time.
+ * This version of the method is
+ * given the time to log, instead of expecting this method to
+ * get the time itself. This is done in case the time was
+ * recorded much earlier than this method was called.
+ */
+ public static void setStartTime(String message, long time) {
+ if (loggingEnabled()) {
+ times.set(START_INDEX, new TimeData(message, time));
+ }
+ }
+
+ /**
+ * Gets the start time, which should be the time when
+ * the java process started, prior to the VM actually being
+ * loaded.
+ */
+ public static long getStartTime() {
+ if (loggingEnabled()) {
+ return times.get(START_INDEX).getTime();
+ } else {
+ return 0;
+ }
+ }
+
+ /**
+ * Sets the value of a given time and returns the index of the
+ * slot that that time was stored in.
+ */
+ public static int setTime(String message) {
+ if (loggingEnabled()) {
+ long nowTime = getCurrentTime();
+ return setTime(message, nowTime);
+ } else {
+ return 0;
+ }
+ }
+
+ /**
+ * Sets the value of a given time and returns the index of the
+ * slot that that time was stored in.
+ * This version of the method is
+ * given the time to log, instead of expecting this method to
+ * get the time itself. This is done in case the time was
+ * recorded much earlier than this method was called.
+ */
+ public static int setTime(String message, long time) {
+ if (loggingEnabled()) {
+ // times is already synchronized, but we need to ensure that
+ // the size used in times.set() is the same used when returning
+ // the index of that operation.
+ synchronized (times) {
+ times.add(new TimeData(message, time));
+ return (times.size() - 1);
+ }
+ } else {
+ return 0;
+ }
+ }
+
+ /**
+ * Returns time at given index.
+ */
+ public static long getTimeAtIndex(int index) {
+ if (loggingEnabled()) {
+ return times.get(index).getTime();
+ } else {
+ return 0;
+ }
+ }
+
+ /**
+ * Returns message at given index.
+ */
+ public static String getMessageAtIndex(int index) {
+ if (loggingEnabled()) {
+ return times.get(index).getMessage();
+ } else {
+ return null;
+ }
+ }
+
+ /**
+ * Outputs all data to parameter-specified Writer object
+ */
+ public static void outputLog(Writer writer) {
+ if (loggingEnabled()) {
+ try {
+ synchronized(times) {
+ for (int i = 0; i < times.size(); ++i) {
+ TimeData td = times.get(i);
+ if (td != null) {
+ writer.write(i + " " + td.getMessage() + ": " +
+ (td.getTime() - baseTime) + "\n");
+
+ }
+ }
+ }
+ writer.flush();
+ } catch (Exception e) {
+ System.out.println(e + ": Writing performance log to " +
+ writer);
+ }
+ }
+ }
+
+ /**
+ * Outputs all data to whatever location the user specified
+ * via sun.perflog command-line parameter.
+ */
+ public static void outputLog() {
+ outputLog(logWriter);
+ }
+}