File copying from down-level systems to Windows Vista or Windows Server 2008 is significantly slower if Intel I/OAT is enabled

Symptoms

Consider the following scenario:

  • You have a computer that is running Windows Vista or Windows Server 2008.

  • Intel I/O Acceleration Technology (I/OAT) is enabled on the computer.

  • You copy files to this computer from another computer that is running a down-level operating system, such as Windows XP and Windows Server 2003.

In this scenario, the file copying is significantly slower than when Intel I/O Acceleration Technology is disabled.

Resolution

Hotfix information

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

No prerequisites are required for Windows Server 2008-based computers.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The Global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table.

Windows Vista and Windows Server 2008 file information notes

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.0.6000.16xxx

    Windows Vista

    RTM

    GDR

    6.0.6000.20xxx

    Windows Vista

    RTM

    LDR

    6.0.6001.18xxx

    Windows Vista and Windows Server 2008

    SP1

    GDR

    6.0.6001.22xxx

    Windows Vista and Windows Server 2008

    SP1

    LDR

    6.0.6002.18xxx

    Windows Vista and Windows Server 2008

    SP2

    GDR

    6.0.6002.22xxx

    Windows Vista and Windows Server 2008

    SP2

    LDR

  • Service Pack 1 is integrated into the original release of Windows Server 2008.

  • The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the
Time Zone tab in the Date and Time item in Control Panel.

For all supported x86-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Netio.sys

6.0.6001.22447

220,248

10-Jun-2009

12:27

x86

Bfe.dll

6.0.6001.22447

328,704

10-Jun-2009

11:53

x86

Fwpkclnt.sys

6.0.6001.22447

98,392

10-Jun-2009

12:27

x86

Fwpuclnt.dll

6.0.6001.22447

595,456

10-Jun-2009

11:54

x86

Ikeext.dll

6.0.6001.22447

438,272

10-Jun-2009

11:54

x86

Wfp.mof

Not Applicable

814

01-Apr-2009

19:02

Not Applicable

Wfp.tmf

Not Applicable

208,966

10-Jun-2009

10:01

Not Applicable

Tcpip.sys

6.0.6001.22447

890,456

10-Jun-2009

12:28

x86

Tcpip.sys

6.0.6002.22150

896,568

10-Jun-2009

12:13

x86

For all supported x64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Netio.sys

6.0.6001.22447

342,600

10-Jun-2009

12:43

x64

Bfe.dll

6.0.6001.22447

458,240

10-Jun-2009

12:09

x64

Fwpkclnt.sys

6.0.6001.22447

165,448

10-Jun-2009

12:43

x64

Fwpuclnt.dll

6.0.6001.22447

779,776

10-Jun-2009

12:10

x64

Ikeext.dll

6.0.6001.22447

454,656

10-Jun-2009

12:10

x64

Wfp.mof

Not Applicable

814

01-Apr-2009

16:13

Not Applicable

Wfp.tmf

Not Applicable

207,863

10-Jun-2009

10:29

Not Applicable

Tcpip.sys

6.0.6001.22447

1,408,600

10-Jun-2009

12:44

x64

Tcpip.sys

6.0.6002.22150

1,423,432

10-Jun-2009

12:24

x64

Fwpuclnt.dll

6.0.6001.22447

595,456

10-Jun-2009

11:54

x86

Wfp.mof

Not Applicable

814

01-Apr-2009

19:02

Not Applicable

For all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Netio.sys

6.0.6001.22447

638,536

10-Jun-2009

12:19

IA-64

Bfe.dll

6.0.6001.22447

781,312

10-Jun-2009

11:40

IA-64

Fwpkclnt.sys

6.0.6001.22447

261,192

10-Jun-2009

12:19

IA-64

Fwpuclnt.dll

6.0.6001.22447

1,122,304

10-Jun-2009

11:41

IA-64

Ikeext.dll

6.0.6001.22447

925,184

10-Jun-2009

11:41

IA-64

Wfp.mof

Not Applicable

814

01-Apr-2009

16:14

Not Applicable

Wfp.tmf

Not Applicable

207,769

10-Jun-2009

10:10

Not Applicable

Tcpip.sys

6.0.6001.22447

2,919,496

10-Jun-2009

12:20

IA-64

Tcpip.sys

6.0.6002.22150

2,932,280

10-Jun-2009

12:14

IA-64

Fwpuclnt.dll

6.0.6001.22447

595,456

10-Jun-2009

11:54

x86

Wfp.mof

Not Applicable

814

01-Apr-2009

19:02

Not Applicable

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

Intel I/OAT, together with the network direct memory access (NetDMA) feature in Windows Vista Service Pack 1 or Windows Server 2008, provides direct memory access to memory by network-intensive applications. This significantly reduces the CPU load by reducing memory copying during networking operations. For Intel I/OAT to work, it must be enabled in both the BIOS and the operating system. By default, Intel I/OAT is disabled.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Package_for_kb968991_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,641

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,694

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_client~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,713

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,422

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,690

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_sc~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,701

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,425

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,694

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_server~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,713

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,422

11-Jun-2009

06:08

Not Applicable

Package_for_kb968991_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum

Not Applicable

1,430

11-Jun-2009

06:08

Not Applicable

X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_5700d1a8ce853fc3.manifest

Not Applicable

3,908

10-Jun-2009

15:45

Not Applicable

X86_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_cd89d4bc43c2906d.manifest

Not Applicable

127,634

10-Jun-2009

15:46

Not Applicable

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22447_none_b38377257f9df95a.manifest

Not Applicable

6,254

10-Jun-2009

15:47

Not Applicable

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6002.22150_none_b558171b7cd2b90e.manifest

Not Applicable

6,400

10-Jun-2009

13:32

Not Applicable

Additional files for all supported x64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_b31f6d2c86e2b0f9.manifest

Not Applicable

3,916

10-Jun-2009

14:08

Not Applicable

Amd64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_29a8703ffc2001a3.manifest

Not Applicable

127,680

10-Jun-2009

14:10

Not Applicable

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22447_none_0fa212a937fb6a90.manifest

Not Applicable

6,276

10-Jun-2009

14:11

Not Applicable

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6002.22150_none_1176b29f35302a44.manifest

Not Applicable

6,422

10-Jun-2009

14:01

Not Applicable

Package_for_kb968991_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,651

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,706

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_client~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,723

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,430

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,702

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,711

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,433

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,706

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_server~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,723

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,430

11-Jun-2009

06:10

Not Applicable

Package_for_kb968991_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum

Not Applicable

1,438

11-Jun-2009

06:10

Not Applicable

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_bd74177ebb4372f4.manifest

Not Applicable

2,730

10-Jun-2009

15:39

Not Applicable

Wow64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_33fd1a923080c39e.manifest

Not Applicable

71,155

10-Jun-2009

15:39

Not Applicable

Additional files for all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_5702759ece8348bf.manifest

Not Applicable

3,912

10-Jun-2009

15:33

Not Applicable

Ia64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_cd8b78b243c09969.manifest

Not Applicable

127,657

10-Jun-2009

15:35

Not Applicable

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6001.22447_none_b3851b1b7f9c0256.manifest

Not Applicable

6,265

10-Jun-2009

15:36

Not Applicable

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.0.6002.22150_none_b559bb117cd0c20a.manifest

Not Applicable

6,411

10-Jun-2009

12:59

Not Applicable

Package_for_kb968991_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,425

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,530

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,706

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,429

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,533

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_server~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,718

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,426

11-Jun-2009

06:07

Not Applicable

Package_for_kb968991_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum

Not Applicable

1,434

11-Jun-2009

06:07

Not Applicable

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.0.6001.22447_none_bd74177ebb4372f4.manifest

Not Applicable

2,730

10-Jun-2009

15:39

Not Applicable

Wow64_microsoft-windows-network-security_31bf3856ad364e35_6.0.6001.22447_none_33fd1a923080c39e.manifest

Not Applicable

71,155

10-Jun-2009

15:39

Not Applicable

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.

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