Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/InitTimer.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 May 2015 23:21:15 +0200 |
parents | 9579a3c62a9e |
children | d563baeca9df |
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/* * Copyright (c) 2014, 2015, 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. * * 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 com.oracle.jvmci.hotspot; import com.oracle.jvmci.debug.*; import edu.umd.cs.findbugs.annotations.*; /** * A facility for timing a step in the runtime initialization sequence. This exists separate from * {@link DebugTimer} as it must be independent from all other Graal code so as to not perturb the * initialization sequence. */ public final class InitTimer implements AutoCloseable { final String name; final long start; private InitTimer(String name) { this.name = name; this.start = System.currentTimeMillis(); System.out.println("START: " + SPACES.substring(0, timerDepth * 2) + name); assert Thread.currentThread() == initializingThread : Thread.currentThread() + " != " + initializingThread; timerDepth++; } @SuppressFBWarnings(value = "ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD", justification = "only the initializing thread accesses this field") public void close() { final long end = System.currentTimeMillis(); timerDepth--; System.out.println(" DONE: " + SPACES.substring(0, timerDepth * 2) + name + " [" + (end - start) + " ms]"); } public static InitTimer timer(String name) { return ENABLED ? new InitTimer(name) : null; } public static InitTimer timer(String name, Object suffix) { return ENABLED ? new InitTimer(name + suffix) : null; } /** * Specifies if initialization timing is enabled. This can only be set via a system property as * the timing facility is used to time initialization of {@link HotSpotOptions}. */ private static final boolean ENABLED = Boolean.getBoolean("jvmci.runtime.TimeInit"); public static int timerDepth = 0; public static final String SPACES = " "; /** * Used to assert the invariant that all initialization happens on the same thread. */ public static final Thread initializingThread; static { if (ENABLED) { initializingThread = Thread.currentThread(); System.out.println("INITIALIZING THREAD: " + initializingThread); } else { initializingThread = null; } } }