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Posted to commits@arrow.apache.org by em...@apache.org on 2019/06/27 07:45:27 UTC
[arrow] branch master updated: ARROW-5752: [Java] Improve the
performance of ArrowBuf#setZero
This is an automated email from the ASF dual-hosted git repository.
emkornfield pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/arrow.git
The following commit(s) were added to refs/heads/master by this push:
new 95175fe ARROW-5752: [Java] Improve the performance of ArrowBuf#setZero
95175fe is described below
commit 95175fe7cb8439eebe6d2f6e0495f551d6864380
Author: liyafan82 <fa...@foxmail.com>
AuthorDate: Thu Jun 27 00:44:11 2019 -0700
ARROW-5752: [Java] Improve the performance of ArrowBuf#setZero
The current implementation involves repeated calls of setLong, setInt & setByte. It is more efficient to directly call the native function.
Performance improve by 4.8x
before:
ArrowBufBenchmarks.setZero avgt 5 319616.675 ± 918.298 ns/op
after:
ArrowBufBenchmarks.setZero avgt 5 66616.553 ± 202.525 ns/op
Author: liyafan82 <fa...@foxmail.com>
Closes #4715 from liyafan82/fly_0627_zero and squashes the following commits:
545f135f1 <liyafan82> Improve the performance of ArrowBuf#setZero
---
.../src/main/java/io/netty/buffer/ArrowBuf.java | 29 +-------
.../java/io/netty/buffer/ArrowBufBenchmarks.java | 86 ++++++++++++++++++++++
2 files changed, 89 insertions(+), 26 deletions(-)
diff --git a/java/memory/src/main/java/io/netty/buffer/ArrowBuf.java b/java/memory/src/main/java/io/netty/buffer/ArrowBuf.java
index c3b34b6..c7502b4 100644
--- a/java/memory/src/main/java/io/netty/buffer/ArrowBuf.java
+++ b/java/memory/src/main/java/io/netty/buffer/ArrowBuf.java
@@ -1158,34 +1158,11 @@ public final class ArrowBuf implements AutoCloseable {
* @return this ArrowBuf
*/
public ArrowBuf setZero(int index, int length) {
- if (length == 0) {
- return this;
- } else {
+ if (length != 0) {
this.checkIndex(index, length);
- int nLong = length >>> 3;
- int nBytes = length & 7;
- int i;
- for (i = nLong; i > 0; --i) {
- setLong(index, 0L);
- index += 8;
- }
- if (nBytes == 4) {
- setInt(index, 0);
- } else if (nBytes < 4) {
- for (i = nBytes; i > 0; --i) {
- setByte(index, 0);
- ++index;
- }
- } else {
- setInt(index, 0);
- index += 4;
- for (i = nBytes - 4; i > 0; --i) {
- setByte(index, 0);
- ++index;
- }
- }
- return this;
+ PlatformDependent.setMemory(this.addr + index, length, (byte) 0);
}
+ return this;
}
/**
diff --git a/java/performance/src/test/java/io/netty/buffer/ArrowBufBenchmarks.java b/java/performance/src/test/java/io/netty/buffer/ArrowBufBenchmarks.java
new file mode 100644
index 0000000..dc43070
--- /dev/null
+++ b/java/performance/src/test/java/io/netty/buffer/ArrowBufBenchmarks.java
@@ -0,0 +1,86 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF 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
+ *
+ * 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.
+ */
+
+package io.netty.buffer;
+
+import java.util.concurrent.TimeUnit;
+
+import org.apache.arrow.memory.BufferAllocator;
+import org.apache.arrow.memory.RootAllocator;
+import org.junit.Test;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.TearDown;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+/**
+ * Benchmarks for {@link ArrowBuf}.
+ */
+@State(Scope.Benchmark)
+public class ArrowBufBenchmarks {
+
+ private static final int BUFFER_CAPACITY = 1024 * 1024;
+
+ private static final int ALLOCATOR_CAPACITY = 1024 * 1024;
+
+ private BufferAllocator allocator;
+
+ private ArrowBuf buffer;
+
+ /**
+ * Setup benchmarks.
+ */
+ @Setup
+ public void prepare() {
+ allocator = new RootAllocator(ALLOCATOR_CAPACITY);
+ buffer = allocator.buffer(BUFFER_CAPACITY);
+ }
+
+ /**
+ * Tear down benchmarks.
+ */
+ @TearDown
+ public void tearDown() {
+ buffer.close();
+ allocator.close();
+ }
+
+ @Benchmark
+ @BenchmarkMode(Mode.AverageTime)
+ @OutputTimeUnit(TimeUnit.NANOSECONDS)
+ public void setZero() {
+ buffer.setZero(0, BUFFER_CAPACITY);
+ }
+
+ @Test
+ public void evaluate() throws RunnerException {
+ Options opt = new OptionsBuilder()
+ .include(ArrowBufBenchmarks.class.getSimpleName())
+ .forks(1)
+ .build();
+
+ new Runner(opt).run();
+ }
+}