Add a benchmark for examining the performance difference between explicitly closing memory segments, versus having them closed by cleaners

This commit is contained in:
Chris Vest 2020-11-25 10:42:41 +01:00
parent f611d58a6e
commit 6364c4d170

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@ -0,0 +1,107 @@
/*
* Copyright 2019 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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.
*/
package io.netty.buffer.api.benchmarks;
import io.netty.buffer.api.Allocator;
import io.netty.buffer.api.Buf;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import static java.util.concurrent.CompletableFuture.completedFuture;
@Warmup(iterations = 30, time = 1)
@Measurement(iterations = 30, time = 1)
@Fork(value = 5, jvmArgsAppend = { "-XX:+UnlockDiagnosticVMOptions", "-XX:+DebugNonSafepoints" })
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@State(Scope.Benchmark)
public class MemorySegmentClosedByCleanerBenchmark {
private static final Allocator direct = Allocator.direct();
private static final Allocator withCleaner = Allocator.directWithCleaner();
@Param({"heavy", "light"})
public String workload;
public boolean isHeavy;
@Setup
public void setUp() {
if ("heavy".equals(workload)) {
isHeavy = true;
} else if ("light".equals(workload)) {
isHeavy = false;
} else {
throw new IllegalArgumentException("Unsupported workload: " + workload);
}
}
@Benchmark
public Buf explicitClose() throws Exception {
try (Buf buf = process(direct.allocate(256))) {
return buf;
}
}
@Benchmark
public Buf cleanerClose() throws Exception {
return process(withCleaner.allocate(256));
}
private Buf process(Buf buffer) throws Exception {
// Simulate some async network server thingy, processing the buffer.
var tlr = ThreadLocalRandom.current();
if (isHeavy) {
return completedFuture(buffer.send()).thenApplyAsync(send -> {
try (Buf buf = send.receive()) {
while (buf.writableBytes() > 0) {
buf.writeByte((byte) tlr.nextInt());
}
return buf.send();
}
}).thenApplyAsync(send -> {
try (Buf buf = send.receive()) {
byte b = 0;
while (buf.readableBytes() > 0) {
b += buf.readByte();
}
buf.fill(b);
return buf.send();
}
}).get().receive();
} else {
while (buffer.writableBytes() > 0) {
buffer.writeByte((byte) tlr.nextInt());
}
byte b = 0;
while (buffer.readableBytes() > 0) {
b += buffer.readByte();
}
buffer.fill(b);
return buffer;
}
}
}