mikeb01

public final class Integer
{
    public static int bitCount(int i)
    {
        // HD, Figure 5-2
        i = i - ((i >>> 1) & 0x55555555);
        i = (i & 0x33333333) + ((i >>> 2) & 0x33333333);
        i = (i + (i >>> 4)) & 0x0f0f0f0f;
        i = i + (i >>> 8);
        i = i + (i >>> 16);

mikeb01

mov    %r11d,%r8d
shr    %r8d
and    $0x55555555,%r8d
sub    %r8d,%r11d         ;*isub
                          ; - java.lang.Integer::bitCount@7 (line 1143)
                          ; - PopCntTest::main@9 (line 9)
mov    %r11d,%r8d
shr    $0x2,%r8d
and    $0x33333333,%r11d
and    $0x33333333,%r8d

mikeb01

popcnt %r11d,%ebx
add    0x8(%rsi),%ebx     ;*iadd
                          ; - PopCntTest::main@12 (line 9)
  

mikeb01

public class PopCntBenchmark extends SimpleBenchmark
{
    public int timeIntegerBitCount(int iterations)
    {
        int result = 0;
        for (int i = 0; i < iterations; i++)
        {
            result += Integer.bitCount(i);
        }
        return result;

mikeb01

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
   <match target="font">
      <edit name="autohint" mode="assign">
         <bool>true</bool>
      </edit>
      <edit name="hinting" mode="assign">
         <bool>true</bool>
      </edit>

mikeb01

#!/bin/bash
LINKDIR=/usr/bin
JHOME=/usr/java/latest
JREDIR=$JHOME/jre/bin
JDKDIR=$JHOME/bin


sudo alternatives --install $LINKDIR/java java $JREDIR/java 20000  \
  --slave $LINKDIR/keytool     keytool     $JREDIR/keytool         \
  --slave $LINKDIR/orbd        orbd        $JREDIR/orbd            \

mikeb01

package org.openjdk.jmh.samples;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

mikeb01

diff --git a/aeron-driver/src/test/java/uk/co/real_logic/aeron/driver/UdpChannelTest.java b/aeron-driver/src/test/java/uk/co/real_logic/aeron/driver/UdpChannelTest.java
index 32e3814..fb28e8b 100644
--- a/aeron-driver/src/test/java/uk/co/real_logic/aeron/driver/UdpChannelTest.java
+++ b/aeron-driver/src/test/java/uk/co/real_logic/aeron/driver/UdpChannelTest.java
@@ -22,15 +22,17 @@ import static org.hamcrest.MatcherAssert.assertThat;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.NetworkInterface;
+import java.net.SocketException;
 import java.net.UnknownHostException;

mikeb01

RingBuffer<ValueEvent<String>> ringBuffer = new RingBuffer<>(...);
String data = "ABC";

long next = ringBuffer.next();
try
{
    ValueEvent<String> event = ringBuffer.get(next);
    event.set(data);
}
finally

mikeb01

RingBuffer<ValueEvent<String>> ringBuffer = new RingBuffer<>(...);
String data = "ABC";

ringBuffer.publishEvent((event, seq, arg) -> event.set(arg), data);