Mercurial > hg > truffle
view graal/com.oracle.max.cri/src/com/oracle/max/cri/ri/RiProfilingInfo.java @ 5151:5717fc2be01c
Merge
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Thu, 22 Mar 2012 19:06:04 -0700 |
parents | dad1ac9dba7d |
children | 4c3d953f8131 |
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/* * Copyright (c) 2012, 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.max.cri.ri; /** * Provides access to the profiling information of one specific method. * Every accessor method returns the information that is available at the time of invocation. * If a method is invoked multiple times, it may return significantly different results for every invocation * as the profiling information may be changed by other Java threads at any time. */ public interface RiProfilingInfo { /** * Returns an estimate of how often the branch at the given byte code was taken. * @return The estimated probability, with 0.0 meaning never and 1.0 meaning always, or -1 if this information is not available. */ double getBranchTakenProbability(int bci); /** * Returns an estimate of how often the switch cases are taken at the given BCI. * The default case is stored as the last entry. * @return A double value that contains the estimated probabilities, with 0.0 meaning never and 1.0 meaning always, * or -1 if this information is not available. */ double[] getSwitchProbabilities(int bci); /** * Returns the TypeProfile for the given BCI. * @return Returns an RiTypeProfile object, or null if not available. */ RiTypeProfile getTypeProfile(int bci); /** * Returns information if the given BCI did ever throw an exception. * @return @link{RiExceptionSeen.TRUE} if the instruction has thrown an exception at least once, * @link{RiExceptionSeen.FALSE} if it never threw an exception, and @link{RiExceptionSeen.UNKNOWN} * if this information was not recorded. */ RiExceptionSeen getExceptionSeen(int bci); /** * Returns an estimate how often the current BCI was executed. Avoid comparing execution counts to each other, * as the returned value highly depends on the time of invocation. * @return the estimated execution count or -1 if not available. */ int getExecutionCount(int bci); /** * Returns how frequently a method was deoptimized for the given deoptimization reason. This only indicates how * often the method did fall back to the interpreter for the execution and does not indicate how often it was recompiled. * @param reason the reason for which the number of deoptimizations should be queried * @return the number of times the compiled method deoptimized for the given reason. */ int getDeoptimizationCount(RiDeoptReason reason); }