stepheneb

Building MLVM version of OpenJDK (Java 1.8) on Mac OS X

Take a look at the comments and code in update.sh.

Requires a working version of Java 1.8.

I use create_tarball.sh to make a copy of the build to share.

OpenJDK 1.7 builds for Mac OS X:

authorNari

CRuby's Parallel Marking (Draft)(Ja)

ソースコード: https://github.com/authorNari/ruby
※まだ実装中

1 Abstract
並列スレッドの仕事分配には「Arora's Task Stealing Deque」のアルゴリズムを利用する。
http://doi.acm.org/10.1145/277651.277678
また、並列マークの実装の大部分はOpenJDK7のコードを参考に独自改良したものである。

gist:878653

import java.util.Collections
import java.util.ArrayList

list = ArrayList.new [ "one", "two", "three", "four" ]

puts "unsorted: #{list}"

Collections.sort(list) do |s1, s2|
  l1 = dynamic(s1).length
  l2 = dynamic(s2).length

mastbaum

#include<iostream>
#include<signal.h>
#include<limits.h>

/** g++'s -ftrapv flag provides some protection against integer overflows. It
 *  is a little awkward to use, though. All it will do is "trap" -- you must
 *  provide a signal handler to deal with it.
 *
 *  (You must compile with -ftrapv for this to work)
 */

mattpodwysocki

let inline name (x : ^T) = (^T : (member Name : string) (x))
let inline age (x : ^T) = (^T : (member Age : int) (x))
let inline nameAndAge x = (name x, age x)

type Person(name : string, age : int) =
  member __.Name = name
  member __.Age = age

type Employee(name : string, age : int, employeeId : string) =
  member __.Name = name

gist:1108283

package com.headius.indy.examples;

import java.lang.invoke.MethodHandle;
import static java.lang.invoke.MethodHandles.*;
import static java.lang.invoke.MethodType.*;
import java.lang.invoke.MutableCallSite;

public class IndyLoop {
    public static void main(String[] args) throws Throwable {
        // method handle loop adds up numbers from 1 to args[0].to_i

headius

#!/bin/sh
# This script is for building the hsx/hotspot-comp branch in isolation.
#
# Prerequisites:
# * appropriate build tools
# * a working Sun Java 6 build (i.e. JDK6) is available at:
#     HOME/java/re/j2se/1.6.0/latest/binaries/linux-[i586/amd64]
# * a working Sun Java 7 build (i.e. JDK7) is available at:
#     HOME/java/re/j2se/1.7.0/latest/binaries/linux-[i586/amd64]
#     HOME/java/re/j2se/1.7.0/promoted/latest/binaries/linux-[i586/amd64]

ytoshima

AbstractInterpreter::_code : StubQueue * = 0xb49150c0
_stub_buffer    : 0xb6f7a6c0
_number_of_stubs: 0x103
Codelet @ 0xb6f7a6c0      128   -1 0xffffffff  0x10c81a1:	 "slow signature handler"
Dump of assembler code from 0xb6f7a6e0 to 0xb6f7a740:
   0xb6f7a6e0:	mov    %esp,%ecx
   0xb6f7a6e2:	call   0xb6f7a6ec
   0xb6f7a6e7:	jmp    0xb6f7a73f
   0xb6f7a6ec:	push   %ecx
   0xb6f7a6ed:	push   %edi

szegedi

Table of names of MemoryManagerMXBean and MemoryPoolMXBean instances under
different GC algorithms in Oracle HotSpot VM. Memory managers list the pools
they manage in square brackets; memory pools show their maximum sizes for -Xmx200M setting.

$ java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

SerialGC:

authorNari

CRubyのGCの構造改革

やりたいこと

以下の6つの機能を分離し、簡単に切り替えられるようにしたい。

1. OSからのメモリアロケータ

• OSからメモリアロケートする部分のAPI

2. Rubyのヒープ管理

• ヒープの設定を保持