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78 lines
2.3 KiB
Java
78 lines
2.3 KiB
Java
/*
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* Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.vm.compiler;
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import org.openjdk.jmh.annotations.*;
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import java.util.Objects;
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import java.util.concurrent.TimeUnit;
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@Warmup(iterations = 3, time = 1)
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@Measurement(iterations = 5, time = 1)
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@BenchmarkMode(Mode.Throughput)
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@OutputTimeUnit(TimeUnit.SECONDS)
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@State(Scope.Thread)
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@Fork(value=3)
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public class CountedLoopCastIV {
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@Param({"1024", "1536", "2048"})
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private int limit;
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private static final int LEN = 2048;
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private int start;
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private int[] arr;
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@Setup
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public void init() {
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arr = new int[LEN];
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for (int i = 0; i < LEN; i++) {
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arr[i] = i;
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}
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start = 0;
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limit = Math.min(limit, LEN - 4);
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}
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@Benchmark
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public void loop_iv_int() {
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int i = start;
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while (i < limit) {
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Objects.checkIndex(i, LEN - 1);
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int a = arr[i + 1];
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Objects.checkIndex(i, LEN - 3);
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arr[i + 3] = a;
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i++;
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}
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}
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@Benchmark
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public void loop_iv_long() {
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for (long i = start; i < limit; i++) {
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Objects.checkIndex(i, LEN - 1);
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int a = arr[(int)i + 1];
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Objects.checkIndex(i, LEN - 3);
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arr[(int)i + 3] = a;
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}
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}
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}
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