| /* |
| * Copyright (c) 2017, 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 org.graalvm.compiler.replacements; |
| |
| /** |
| * A histogram that can (only) be {@linkplain #inc(long) incremented} from within a snippet for |
| * gathering snippet specific metrics. |
| */ |
| public final class SnippetIntegerHistogram { |
| private final SnippetCounter.Group group; |
| private final String name; |
| |
| private final SnippetCounter counter0; |
| private final SnippetCounter counter1; |
| private final SnippetCounter counter2; |
| private final SnippetCounter counter3; |
| private final SnippetCounter counter4; |
| private final SnippetCounter counter5; |
| private final SnippetCounter counter6; |
| private final SnippetCounter counter7; |
| private final SnippetCounter counter8; |
| private final SnippetCounter counter9; |
| private final SnippetCounter counter10; |
| |
| private final int counter0UpperBound; |
| private final int counter1UpperBound; |
| private final int counter2UpperBound; |
| private final int counter3UpperBound; |
| private final int counter4UpperBound; |
| private final int counter5UpperBound; |
| private final int counter6UpperBound; |
| private final int counter7UpperBound; |
| private final int counter8UpperBound; |
| private final int counter9UpperBound; |
| |
| public SnippetIntegerHistogram(SnippetCounter.Group group, int log2StepLength, String name, String description) { |
| assert log2StepLength > 0; |
| |
| this.group = group; |
| this.name = name; |
| |
| int lowerBound = 0; |
| counter0UpperBound = 0; |
| counter0 = createCounter(group, name, description, lowerBound, counter0UpperBound); |
| |
| lowerBound = counter0UpperBound + 1; |
| counter1UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter1 = createCounter(group, name, description, lowerBound, counter1UpperBound); |
| |
| lowerBound = counter1UpperBound + 1; |
| counter2UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter2 = createCounter(group, name, description, lowerBound, counter2UpperBound); |
| |
| lowerBound = counter2UpperBound + 1; |
| counter3UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter3 = createCounter(group, name, description, lowerBound, counter3UpperBound); |
| |
| lowerBound = counter3UpperBound + 1; |
| counter4UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter4 = createCounter(group, name, description, lowerBound, counter4UpperBound); |
| |
| lowerBound = counter4UpperBound + 1; |
| counter5UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter5 = createCounter(group, name, description, lowerBound, counter5UpperBound); |
| |
| lowerBound = counter5UpperBound + 1; |
| counter6UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter6 = createCounter(group, name, description, lowerBound, counter6UpperBound); |
| |
| lowerBound = counter6UpperBound + 1; |
| counter7UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter7 = createCounter(group, name, description, lowerBound, counter7UpperBound); |
| |
| lowerBound = counter7UpperBound + 1; |
| counter8UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter8 = createCounter(group, name, description, lowerBound, counter8UpperBound); |
| |
| lowerBound = counter8UpperBound + 1; |
| counter9UpperBound = Math.max(1, lowerBound - 1) << log2StepLength; |
| counter9 = createCounter(group, name, description, lowerBound, counter9UpperBound); |
| |
| lowerBound = counter9UpperBound + 1; |
| counter10 = createCounter(group, name, description, lowerBound, Long.MAX_VALUE); |
| } |
| |
| private static SnippetCounter createCounter(SnippetCounter.Group group, String name, String description, long lowerBound, long upperBound) { |
| if (group != null) { |
| SnippetCounter snippetCounter = new SnippetCounter(group, name + "[" + lowerBound + ", " + upperBound + "]", description); |
| return snippetCounter; |
| } |
| return null; |
| } |
| |
| /** |
| * Increments the value of the matching histogram element. This method can only be used in a |
| * snippet on a compile-time constant {@link SnippetIntegerHistogram} object. |
| */ |
| public void inc(long value) { |
| if (group != null) { |
| if (value <= counter0UpperBound) { |
| counter0.inc(); |
| } else if (value <= counter1UpperBound) { |
| counter1.inc(); |
| } else if (value <= counter2UpperBound) { |
| counter2.inc(); |
| } else if (value <= counter3UpperBound) { |
| counter3.inc(); |
| } else if (value <= counter4UpperBound) { |
| counter4.inc(); |
| } else if (value <= counter5UpperBound) { |
| counter5.inc(); |
| } else if (value <= counter6UpperBound) { |
| counter6.inc(); |
| } else if (value <= counter7UpperBound) { |
| counter7.inc(); |
| } else if (value <= counter8UpperBound) { |
| counter8.inc(); |
| } else if (value <= counter9UpperBound) { |
| counter9.inc(); |
| } else { |
| counter10.inc(); |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| if (group != null) { |
| return "SnippetHistogram-" + group.name + ":" + name; |
| } |
| return super.toString(); |
| } |
| } |