Mercurial > hg > truffle
diff graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/InitTimer.java @ 21551:5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Tue, 26 May 2015 17:13:37 +0200 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/InitTimer.java Tue May 26 17:13:37 2015 +0200 @@ -0,0 +1,82 @@ +/* + * 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.graal.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; + } + } +}