13岁的新加坡初中生，让我这个80后情何以堪啊！！！

这个是他家卖VPS的网站  http://bolthub.net/

母鸡atomN270，1G RAM，ubuntu8.04 server，无X界面.
小鸡196M RAM，128M swap，1G disk，debian lenny.
========================================================================
   BYTE UNIX Benchmarks (Version 5.1.2)

   System: vm01: GNU/Linux
   OS: GNU/Linux — 2.6.24-28-xen — #1 SMP Fri Feb 11 18:08:50 UTC 2011
   Machine: i686 (unknown)
   Language: en_US.utf8 (charmap="ANSI_X3.4-1968", collate="ANSI_X3.4-1968")
   CPU 0: Intel(R) Atom(TM) CPU N270 @ 1.60GHz (3211.8 bogomips)
          Hyper-Threading, MMX, Physical Address Ext
   21:00:05 up  7:48,  1 user,  load average: 0.37, 0.11, 0.03; runlevel 2

————————————————————————
Benchmark Run: Sun Mar 13 2011 21:00:05 – 21:28:24
1 CPU in system; running 1 parallel copy of tests

Dhrystone 2 using register variables        3956963.5 lps   (10.0 s, 7 samples)
Double-Precision Whetstone                      542.5 MWIPS (10.1 s, 7 samples)
Execl Throughput                                736.5 lps   (30.0 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks        146061.5 KBps  (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks           42203.5 KBps  (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks        385825.4 KBps  (30.0 s, 2 samples)
Pipe Throughput                              304830.5 lps   (10.0 s, 7 samples)
Pipe-based Context Switching                  54291.2 lps   (10.0 s, 7 samples)
Process Creation                               1680.6 lps   (30.0 s, 2 samples)
Shell Scripts (1 concurrent)                   1055.6 lpm   (60.0 s, 2 samples)
Shell Scripts (8 concurrent)                    141.7 lpm   (60.1 s, 2 samples)
System Call Overhead                         421064.3 lps   (10.0 s, 7 samples)

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0    3956963.5    339.1
Double-Precision Whetstone                       55.0        542.5     98.6
Execl Throughput                                 43.0        736.5    171.3
File Copy 1024 bufsize 2000 maxblocks          3960.0     146061.5    368.8
File Copy 256 bufsize 500 maxblocks            1655.0      42203.5    255.0
File Copy 4096 bufsize 8000 maxblocks          5800.0     385825.4    665.2
Pipe Throughput                               12440.0     304830.5    245.0
Pipe-based Context Switching                   4000.0      54291.2    135.7
Process Creation                                126.0       1680.6    133.4
Shell Scripts (1 concurrent)                     42.4       1055.6    249.0
Shell Scripts (8 concurrent)                      6.0        141.7    236.1
System Call Overhead                          15000.0     421064.3    280.7
                                                                   ========
System Benchmarks Index Score                                         233.5

下面是2K3系统下Vmware虚拟linux的性能，256M RAM，得分只有103.9。XEN完胜。
http://wifizoo.net/?post=165

========================================================================
   BYTE UNIX Benchmarks (Version 5.1.2)

   System: ubuntu: GNU/Linux
   OS: GNU/Linux — 2.6.24-16-server — #1 SMP Thu Apr 10 13:58:00 UTC 2008
   Machine: i686 (unknown)
   Language: en_US.utf8 (charmap="UTF-8", collate="UTF-8")
   CPU 0: Intel(R) Atom(TM) CPU 230 @ 1.60GHz (3222.0 bogomips)
          MMX, Physical Address Ext, SYSENTER/SYSEXIT
   08:36:59 up  9:07,  1 user,  load average: 0.05, 0.02, 0.00; runlevel 2

————————————————————————
Benchmark Run: Thu Aug 19 2010 08:36:59 – 09:05:22
1 CPU in system; running 1 parallel copy of tests

Dhrystone 2 using register variables        2680248.6 lps   (10.0 s, 7 samples)
Double-Precision Whetstone                      529.4 MWIPS (10.1 s, 7 samples)
Execl Throughput                                301.3 lps   (29.9 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks         64000.7 KBps  (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks           17947.4 KBps  (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks        206245.4 KBps  (30.0 s, 2 samples)
Pipe Throughput                              129787.1 lps   (10.0 s, 7 samples)
Pipe-based Context Switching                   9248.0 lps   (10.0 s, 7 samples)
Process Creation                                544.4 lps   (30.0 s, 2 samples)
Shell Scripts (1 concurrent)                    560.7 lpm   (60.1 s, 2 samples)
Shell Scripts (8 concurrent)                     72.0 lpm   (60.4 s, 2 samples)
System Call Overhead                         149410.0 lps   (10.0 s, 7 samples)

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0    2680248.6    229.7
Double-Precision Whetstone                       55.0        529.4     96.3
Execl Throughput                                 43.0        301.3     70.1
File Copy 1024 bufsize 2000 maxblocks          3960.0      64000.7    161.6
File Copy 256 bufsize 500 maxblocks            1655.0      17947.4    108.4
File Copy 4096 bufsize 8000 maxblocks          5800.0     206245.4    355.6
Pipe Throughput                               12440.0     129787.1    104.3
Pipe-based Context Switching                   4000.0       9248.0     23.1
Process Creation                                126.0        544.4     43.2
Shell Scripts (1 concurrent)                     42.4        560.7    132.2
Shell Scripts (8 concurrent)                      6.0         72.0    120.0
System Call Overhead                          15000.0     149410.0     99.6
                                                                   ========
System Benchmarks Index Score                                         103.9

ubuntu-10.04编译安装XEN4.0.1

系统是desktop-i386，已经装了X界面，蛋疼拿来玩一把虚拟化，记录下过程，以备以后用得上。

首先安装需要的软件包：
#  apt-get install gcc g++ make patch libssl-dev bzip2 gettext \
zlib1g-dev python libncurses5-dev libjpeg62-dev libx11-dev \
libgcrypt11-dev pkg-config bridge-utils bcc bin86 libpci-dev \
libsdl-dev python-dev texinfo libc6-dev uuid-dev bison flex fakeroot \
build-essential crash kexec-tools makedumpfile  libncurses5 \
libncurses5-dev iasl gawk
# apt-get build-dep linux

安装 Xen hypervisor 和 tools：
到 http://www.xen.org/products/xen_source.html
下载最新的 Xen 源代码，然后解开、编译、安装
# tar zxvf xen-4.0.0.tar.gz
# cd xen-4.0.0/
# make xen tools stubdom
# sudo make install-xen install-tools install-stubdom
make stubdom 的时候会从网上自动下载一些东西，所以如果是用代理上网的话需要在自己根目录下的 .wgetrc 里加上代理服务器

，以便 wget 能通过代理正常下载：
# vi .wgetrc
http_proxy = http://proxy.vpsee.com:3128/

use_proxy = on
加入到自动启动脚本中：
# sudo update-rc.d xend defaults 20 21
# sudo update-rc.d xendomains defaults 21 20

安装 Xen 内核
# cd
# wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.31.8.tar.bz2

# tar -xjf linux-2.6.31.8.tar.bz2

# wget http://gentoo-xen-kernel.googlecode.com/files/xen-patches-2.6.31-10.tar.bz2

# mkdir xenpatch-2.6.31.8
# cd xenpatch-2.6.31.8
# tar -xjf ../xen-patches-2.6.31-10.tar.bz2
# cd ..

# cd linux-2.6.31.8
# for i in `ls ../xenpatch-2.6.31.8/`; do patch -p1 < ../xenpatch-2.6.31.8/"#i"; done
配置内核，直接把系统已经存在的配置文件拷过来然后在此基础上修改：
root@hasee:/mnt/gcc/linux-2.6.31.8
# cp /boot/config-2.6.32-28-generic  .config

# cp /boot/config-2.6.31-14-server .config
# make menuconfig

Processor type and features —>
  [*] Enable Xen compatible kernel
Networking support —>
  Networking options —>
    <*> 802.1d Ethernet Bridging
Device Drivers —>
  XEN —>
    [*] Privileged Guest (domain 0)
     Backend driver support
       Block-device backend driver
       Block-device tap backend driver
       Block-device tap backend driver 2
       Network-device backend driver
       PCI-device backend driver
       SCSI backend driver
       USB backend driver
    <*> Block-device frontend driver
    <*> Network-device frontend driver
     SCSI frontend driver
     USB frontend driver
    <*> Framebuffer-device frontend driver
    <*>   Keyboard-device frontend driver
    [*] Disable serial port drivers
    <*> Export Xen attributes in sysfs
        Xen version compatibility (3.3.0 and later) —>
           3.3.0 and later
配置好内核参数以后，保存配置文件、退出配置界面就可以开始编译 Linux 内核了：
 

PS：编译了一个晚上，最后发现报错，暂停折腾，有空再继续搞。