Can TCP Chimney Offload and NETDMA be enabled at a same time in windows 10?

Question

I have recently referred to this article -> https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/gg162716(v=ws.10)?redirectedfrom=MSDN .

In this article, there is given description about NETDMA.

There is also some requirements to use NETDMA.

Like;

Requirements for NetDMA

NetDMA must be enabled in BIOS.

CPU must support Intel I/O Acceleration Technology (I/OAT).

You cannot use TCP Chimney Offload and NetDMA together.

I am confused with third requirement (You cannot use TCP Chimney Offload and NetDMA together).

As, In my windows both NETDMA and TCP Chimney are enabled.

( In

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

Both value;

EnableTCPA (NETDMA) and EnableTCPChimney has value data 1 )

This means both of them are enabled or actually one of them is enabled and another is disabled.

Also in that article, at top there is written "Applies To: Windows Server 2008 R2" this means these requirements are only for Windows Server 2008 R2 ?

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Need an urgent reply!----------------------------

Best regard

Answer 1

Hi,

According to this forum post, NetDMA is not supported in Windows 8 / Windows Server 2012 and later (Pay attention to what Jeffrey Tippet [MSFT] said）:

NetDMA (and Direct Cache Access?) have been removed from Windows 8 / Server 2012. Why?

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

If you see NetDAM displayed, just ignore it because NetDMA is not supported in the Windows Server 2012 and later.

For your reference:

Using Netsh command to view TCP Chimney Offload in the operating system

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

Best Regards,
Candy

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Answer 2

Thank you for quick response!

At last,
That means NETDMA is not support in Windows 10.
And, TCP Chimney and RSS are in work!