之前用UnixBench5.1.3测试了手上的几个VPS性能，分别是：

测试完发现，真是一分钱一分货，价格高的VPS其性能也自然比较强，这里只分析下这几个美国VPS配置的CPU。

BurstNet VPS的CPU最差劲，它是唯一的配备台式机CPU的VPS。CPU型号：Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz；酷睿2四核，Intel最便宜的4核。目前已经停产，市场价格：600左右。更郁闷的是，它只把CPU中的一个核心（CPU）分给我的VPS。性能可想而知了，只是普通台式机的性能。

Linode VPS，配备的是Intel的至强CPU（服务器CPU四核心8线程）：Intel(R) Xeon(R) CPU L5520 @ 2.27GHz。Linode VPS的CPU价格最高了，单个CPU市场上报价5000左右的。Linode 分配了4个CPU线程给我的VPS。

Photon VPS，配备的是Intel的至强CPU（服务器CPU四核心8线程）：Intel(R) Xeon(R) CPU E5520 @ 2.27GHz。该CPU和Linode的L5520构架、制作工艺、参数都基本相同，只是L5520 U比较节能65w。E5520市场报价2800左右。Photon分配了8个CPU线程给我的VPS，还比较厚道。

KnownHost VPS，是管理型的VPS，配备了AMD皓龙CPU（服务器双核心CPU）：Quad-Core AMD Opteron(tm) Processor 2378，市场报价1800左右。测试发现KnownHost VPS划分8个核心给我的VPS。这样推算，服务器上应该装了4个CPU。

以下是测试的VPS CPU数目： 

## BurstNet VPS
   CPU 0: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (4788.0 bogomips)

   1 CPU in system; running 1 parallel copy of tests


## Linode VPS
   CPU 0: Intel(R) Xeon(R) CPU L5520 @ 2.27GHz (4533.5 bogomips)
   CPU 1: Intel(R) Xeon(R) CPU L5520 @ 2.27GHz (4533.5 bogomips)
   CPU 2: Intel(R) Xeon(R) CPU L5520 @ 2.27GHz (4533.5 bogomips)
   CPU 3: Intel(R) Xeon(R) CPU L5520 @ 2.27GHz (4533.5 bogomips)

   4 CPUs in system; running 1 parallel copy of tests

## Photon VPS
   CPU 0: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4522.1 bogomips)
   CPU 1: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4522.0 bogomips)
   CPU 2: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (5555.5 bogomips)
   CPU 3: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4521.9 bogomips)
   CPU 4: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4522.0 bogomips)
   CPU 5: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4522.0 bogomips)
   CPU 6: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4522.0 bogomips)
   CPU 7: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz (4522.0 bogomips)

   8 CPUs in system; running 1 parallel copy of tests

## KnownHost VPS
   CPU 0: Quad-Core AMD Opteron(tm) Processor 2378 (4824.8 bogomips)
   CPU 1: Quad-Core AMD Opteron(tm) Processor 2378 (4824.2 bogomips)
   CPU 2: Quad-Core AMD Opteron(tm) Processor 2378 (4824.2 bogomips)
   CPU 3: Quad-Core AMD Opteron(tm) Processor 2378 (4824.2 bogomips)
   CPU 4: Quad-Core AMD Opteron(tm) Processor 2378 (4824.0 bogomips)
   CPU 5: Quad-Core AMD Opteron(tm) Processor 2378 (4823.8 bogomips)
   CPU 6: Quad-Core AMD Opteron(tm) Processor 2378 (4823.8 bogomips)
   CPU 7: Quad-Core AMD Opteron(tm) Processor 2378 (4824.2 bogomips)

   8 CPUs in system; running 1 parallel copy of tests