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/*
* Copyright (C) 2016 Linaro Limited.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* This benchmark is inspired by benchmarks/caffeinemark.
* Original benchmark implements a recursion method which calls itself with invoke-virtual.
*
* This behavior can be different on JIT and AOT mode, because:
* - JIT mode can optimize invoke-virtual with inline cache mechanism.
* - AOT mode has no such optimization.
*
* This benchmark exposes such difference between ART JIT and AOT mode.
*/
package art_benchmarks.jit_aot;
public class Invoke {
public int recursionInvokeVirtual(int i) {
if (i == 0) {
return 0;
} else {
return i + recursionInvokeVirtual(i - 1);
}
}
public static int recursionInvokeStatic(int i) {
if (i == 0) {
return 0;
} else {
return i + recursionInvokeStatic(i - 1);
}
}
public final int recursionInvokeFinal(int i) {
if (i == 0) {
return 0;
} else {
return i + recursionInvokeFinal(i - 1);
}
}
private int recursionInvokePrivate(int i) {
if (i == 0) {
return 0;
} else {
return i + recursionInvokePrivate(i - 1);
}
}
private static final int recursion_depth = 1000;
public void timeRecursionInvokeVirtual(int iters) {
for (int i = 0; i < iters; i++) {
recursionInvokeVirtual(recursion_depth);
}
}
public void timeRecursionInvokeStatic(int iters) {
for (int i = 0; i < iters; i++) {
recursionInvokeStatic(recursion_depth);
}
}
public void timeRecursionInvokeFinal(int iters) {
for (int i = 0; i < iters; i++) {
recursionInvokeFinal(recursion_depth);
}
}
public void timeRecursionInvokePrivate(int iters) {
for (int i = 0; i < iters; i++) {
recursionInvokePrivate(recursion_depth);
}
}
public boolean verify() {
return true;
}
public static void main(String[] args) {
int rc = 0;
Invoke obj = new Invoke();
final long before = System.currentTimeMillis();
obj.timeRecursionInvokeVirtual(1000);
obj.timeRecursionInvokeStatic(1000);
obj.timeRecursionInvokeFinal(1000);
obj.timeRecursionInvokePrivate(1000);
final long after = System.currentTimeMillis();
if (!obj.verify()) {
rc++;
}
System.out.println("art_benchmarks/jit_aot/Invoke: " + (after - before));
System.exit(rc);
}
}
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