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package org.graalvm.compiler.replacements;

A histogram that can (only) be incremented from within a snippet for gathering snippet specific metrics.
/** * 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 SnippetIntegerHistogram object.
/** * 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(); } }