Mercurial > hg > graal-compiler
view graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/ProfileCompiledMethodsPhase.java @ 18993:480bd3b1adcd
Rename BeginNode => AbstractBeginNode.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 28 Jan 2015 00:50:31 +0100 |
parents | c943ba97b2a7 |
children | a2cb19764970 |
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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.graal.phases.common; import java.util.*; import java.util.function.*; import com.oracle.graal.compiler.common.cfg.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.cfg.*; import com.oracle.graal.nodes.debug.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.virtual.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.graph.*; import com.oracle.graal.phases.schedule.*; /** * This phase add counters for the dynamically executed number of nodes. Incrementing the counter * for each node would be too costly, so this phase takes the compromise that it trusts split * probabilities, but not loop frequencies. This means that it will insert counters at the start of * a method and at each loop header. * * A schedule is created so that floating nodes can also be taken into account. The weight of a node * is determined heuristically in the {@link ProfileCompiledMethodsPhase#getNodeWeight(ValueNode)} * method. * * Additionally, there's a second counter that's only increased for code sections without invokes. */ public class ProfileCompiledMethodsPhase extends Phase { private static final String GROUP_NAME = "~profiled weight"; private static final String GROUP_NAME_WITHOUT = "~profiled weight (invoke-free sections)"; private static final String GROUP_NAME_INVOKES = "~profiled invokes"; private static final boolean WITH_SECTION_HEADER = Boolean.parseBoolean(System.getProperty("ProfileCompiledMethodsPhase.WITH_SECTION_HEADER", "false")); private static final boolean WITH_INVOKE_FREE_SECTIONS = Boolean.parseBoolean(System.getProperty("ProfileCompiledMethodsPhase.WITH_FREE_SECTIONS", "false")); private static final boolean WITH_INVOKES = Boolean.parseBoolean(System.getProperty("ProfileCompiledMethodsPhase.WITH_INVOKES", "true")); @Override protected void run(StructuredGraph graph) { ToDoubleFunction<FixedNode> probabilities = new FixedNodeProbabilityCache(); SchedulePhase schedule = new SchedulePhase(); schedule.apply(graph, false); ControlFlowGraph cfg = ControlFlowGraph.compute(graph, true, true, true, true); for (Loop<Block> loop : cfg.getLoops()) { double loopProbability = probabilities.applyAsDouble(loop.getHeader().getBeginNode()); if (loopProbability > (1D / Integer.MAX_VALUE)) { addSectionCounters(loop.getHeader().getBeginNode(), loop.getBlocks(), loop.getChildren(), schedule, probabilities); } } // don't put the counter increase directly after the start (problems with OSR) FixedWithNextNode current = graph.start(); while (current.next() instanceof FixedWithNextNode) { current = (FixedWithNextNode) current.next(); } addSectionCounters(current, cfg.getBlocks(), cfg.getLoops(), schedule, probabilities); if (WITH_INVOKES) { for (Node node : graph.getNodes()) { if (node instanceof Invoke) { Invoke invoke = (Invoke) node; DynamicCounterNode.addCounterBefore(GROUP_NAME_INVOKES, invoke.callTarget().targetName(), 1, true, invoke.asNode()); } } } } private static void addSectionCounters(FixedWithNextNode start, Collection<Block> sectionBlocks, Collection<Loop<Block>> childLoops, SchedulePhase schedule, ToDoubleFunction<FixedNode> probabilities) { HashSet<Block> blocks = new HashSet<>(sectionBlocks); for (Loop<?> loop : childLoops) { blocks.removeAll(loop.getBlocks()); } double weight = getSectionWeight(schedule, probabilities, blocks) / probabilities.applyAsDouble(start); DynamicCounterNode.addCounterBefore(GROUP_NAME, sectionHead(start), (long) weight, true, start.next()); if (WITH_INVOKE_FREE_SECTIONS && !hasInvoke(blocks)) { DynamicCounterNode.addCounterBefore(GROUP_NAME_WITHOUT, sectionHead(start), (long) weight, true, start.next()); } } private static String sectionHead(Node node) { if (WITH_SECTION_HEADER) { return node.toString(); } else { return ""; } } private static double getSectionWeight(SchedulePhase schedule, ToDoubleFunction<FixedNode> probabilities, Collection<Block> blocks) { double count = 0; for (Block block : blocks) { double blockProbability = probabilities.applyAsDouble(block.getBeginNode()); for (ValueNode node : schedule.getBlockToNodesMap().get(block)) { count += blockProbability * getNodeWeight(node); } } return count; } private static double getNodeWeight(ValueNode node) { if (node instanceof MergeNode) { return ((MergeNode) node).phiPredecessorCount(); } else if (node instanceof AbstractBeginNode || node instanceof AbstractEndNode || node instanceof MonitorIdNode || node instanceof ConstantNode || node instanceof ParameterNode || node instanceof CallTargetNode || node instanceof ValueProxy || node instanceof VirtualObjectNode || node instanceof ReinterpretNode) { return 0; } else if (node instanceof AccessMonitorNode) { return 10; } else if (node instanceof Access) { return 2; } else if (node instanceof LogicNode || node instanceof ConvertNode || node instanceof BinaryNode || node instanceof NotNode) { return 1; } else if (node instanceof IntegerDivNode || node instanceof DivNode || node instanceof IntegerRemNode || node instanceof RemNode) { return 10; } else if (node instanceof MulNode) { return 3; } else if (node instanceof Invoke) { return 5; } else if (node instanceof IfNode || node instanceof SafepointNode) { return 1; } else if (node instanceof SwitchNode) { return node.successors().count(); } else if (node instanceof ReturnNode || node instanceof UnwindNode || node instanceof DeoptimizeNode) { return node.successors().count(); } else if (node instanceof AbstractNewObjectNode) { return 10; } return 2; } private static boolean hasInvoke(Collection<Block> blocks) { boolean hasInvoke = false; for (Block block : blocks) { for (FixedNode fixed : block.getNodes()) { if (fixed instanceof Invoke) { hasInvoke = true; } } } return hasInvoke; } }