kb953700:使用单个CPU改善windowsPE2.x性能

Network performance is slow when you run Windows Preinstallation Environment 2.x in certain hardware configurations

SYMPTOMS

When Windows Preinstallation Environment (PE) 2. x is running in the following hardware configurations, you experience slow network performance: 当windows pe 2.x运行在下列硬件上时，你可能会感到网络速度非常缓慢

•	On a system that has a Broadcom NetXtreme Gigabit Ethernet controller that uses ASIC version BCM5704 B0 使用ASIC版BCM5704 B0的Broadcom NetXtreme千兆网卡
•	On a system that has more than two Intel Extended Memory 64 Technology (EM64T) processors installed在一个有超过两个支持EMT64T的CPU的系统

Note The following computers are affected by this issue:

•	Dell PowerEdge 6850
•	IBM xSeries 3850

 

WORKAROUND

To work around this issue, follow these steps:

1.

Disable hyperthreading in the computer's BIOS.

Modify the Boot Configuration Data (BCD) store in Windows PE 2. x so that only one CPU is visible to the operating system. To do this, follow these steps: 在BIOS里关闭超线程 修改PE的BCD存储，使得PE只能发现一个CPU： a. Start Windows PE 2.x.   b.At a command prompt, type the following command, and then press ENTER: 运行PE后输入下列命令 bcdedit /store Path /set {default} on cpu on Note The Path placeholder represents the path of the BCD store. By default, the BCD store resides in the following location: Path参数指向BCD存放的位置，一般位于 c:\winpe\iso\boot\bcd folder in Windows PE 2.x

MORE INFORMATION

This issue does not occur if one or more of the following conditions are true:

如果下面有一个或多个情况符合，则不会出现上述情况

•	The computer has a Broadcom NetXtreme 1 Ethernet controller installed that uses a version of ASIC other than BCM5704 B0.
•	The computer is equipped with non-Intel EM64T processors. 非intel em64t的cpu
•	Windows PE 1.x is used on a system that is running Windows XP or Windows Server 2003.1.x版本的PE

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.