WindowsGuestDrivers/kvmnet/registry - Revision history

Resech: Corrected forcews option.

2019-08-01T20:48:02Z

Corrected forcews option.

← Older revision		Revision as of 16:48, 1 August 2019
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	Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be disabled:		Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be disabled:

	netsh int tcp set heuristics wsh=disabled forcews=~~disabled~~		netsh int tcp set heuristics wsh=disabled forcews=enabled

	The wsh tag is a legacy option and no longer has any effect. The default setting for forcews is enabled, the possible settings are:		The wsh tag is a legacy option and no longer has any effect. The default setting for forcews is enabled, the possible settings are:

Resech: Updated to include parameter descriptions and wsh/forcews tags for the heuristics option.

2019-08-01T20:42:55Z

Updated to include parameter descriptions and wsh/forcews tags for the heuristics option.

← Older revision		Revision as of 16:42, 1 August 2019
Line 39:		Line 39:
	Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be disabled:		Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be disabled:

	netsh int tcp set heuristics disabled		netsh int tcp set heuristics wsh=disabled forcews=disabled
	~~possible settings are:~~ disabled~~,enabled,default~~

	The ~~corresponding Registry value (not necessary to edit if~~ setting ~~via netsh)~~ is ~~located in~~:		The wsh tag is a legacy option and no longer has any effect. The default setting for forcews is enabled, the possible settings are:
	~~HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters~~
	~~EnableWsd=0~~		disabled: Disable force window scaling on retransmit.
	~~(default: 1, recommended~~: 0)		enabled : Enable force window scaling on retransmit.

	== TCP Auto-Tuning ==		== TCP Auto-Tuning ==

Prak: spelling correction

2014-08-27T18:13:49Z

spelling correction

← Older revision		Revision as of 14:13, 27 August 2014
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	== Disable Windows Scaling heuristics ==		== Disable Windows Scaling heuristics ==
	Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be ~~desabled~~:		Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be disabled:

	netsh int tcp set heuristics disabled		netsh int tcp set heuristics disabled
	possible settings are: disabled,enabled,~~defaul~~		possible settings are: disabled,enabled,default

	The corresponding Registry value (not necessary to edit if setting via netsh) is located in:		The corresponding Registry value (not necessary to edit if setting via netsh) is located in:

Stompro: Making it easier to apply registry changes.

2012-06-18T16:26:43Z

Making it easier to apply registry changes.

← Older revision		Revision as of 12:26, 18 June 2012
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	== Registry settings ==		== Registry settings ==
			Save the following as a .reg file and you can apply the changes by running the file on windows.

			<pre>
			Windows Registry Editor Version 5.00

	[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]		[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]

	"DefaultSendWindow"=dword:00100000		"DefaultSendWindow"=dword:00100000

	"DefaultReceiveWindow"=dword:00100000		"DefaultReceiveWindow"=dword:00100000

	"FastSendDatagramThreshold"=dword:00004000		"FastSendDatagramThreshold"=dword:00004000


	[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]		[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]

	"Tcp1323Opts"=dword:00000001		"Tcp1323Opts"=dword:00000001

	"TcpWindowSize"=dword:00100000		"TcpWindowSize"=dword:00100000
			</pre>

	* Tcp1323Opts - allows the scaling of the TCP window above 16k. For more info read [http://technet.microsoft.com/en-us/library/cc938205.aspx Tcp1323Opts]		* Tcp1323Opts - allows the scaling of the TCP window above 16k. For more info read [http://technet.microsoft.com/en-us/library/cc938205.aspx Tcp1323Opts]

Yanv at 18:48, 15 January 2011

2011-01-15T18:48:40Z

← Older revision		Revision as of 14:48, 15 January 2011
Line 37:		Line 37:
	netsh configuration tool should be used to configure the networking settings.		netsh configuration tool should be used to configure the networking settings.

			== Disable Windows Scaling heuristics ==
			Starting from Windows Windows Vista, Windows can disregard user TCP Windows setings. This behavior could be desabled:

			netsh int tcp set heuristics disabled
			possible settings are: disabled,enabled,defaul

			The corresponding Registry value (not necessary to edit if setting via netsh) is located in:
			HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters
			EnableWsd=0
			(default: 1, recommended: 0)

			== TCP Auto-Tuning ==
			To turn off the default receive window auto tuning behavior:

			netsh int tcp set global autotuninglevel=disabled

			The default auto-tuning level is "normal", possible settings are:

			disabled: uses a fixed value for the tcp receive window. Limits it to 64KB.
			highlyrestricted: allows the receive window to grow beyond its default value, very conservatively.
			restricted: somewhat restricted growth of the tcp receive window beyond its default value.
			normal: default value, allows the receive window to grow to accommodate most conditions.
			experimental: allows the receive window to grow to accommodate extreme scenarios (It enables RWIN values of over 16 MB).

	== Compound TCP ==		== Compound TCP ==

Yanv at 18:24, 15 January 2011

2011-01-15T18:24:50Z

← Older revision		Revision as of 14:24, 15 January 2011
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	= Starting from Vista =		= Starting from Vista =
			Starting from Windows Vista the mentioned above setting are not effecting Windows networking stack.

			netsh configuration tool should be used to configure the networking settings.


			== Compound TCP ==
			To increase the TCP Windows with the faster rate Compound TCP should be enabled.
			On Vista and Windows 7, CTCP is off by default. On Windows 2008 it is on.

			To enable CTCP:
			netsh int tcp set global congestionprovider=ctcp

			To disable CTCP:
			netsh int tcp set global congestionprovider=none

Yanv at 17:56, 15 January 2011

2011-01-15T17:56:42Z

← Older revision		Revision as of 13:56, 15 January 2011
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	~~'''Windows registry settings'''~~

	This page describes best practice for configuring Windows TCP\IP related parameters to archive the best performance with Windows guests.		This page describes best practice for configuring Windows TCP\IP related parameters to archive the best performance with Windows guests.
	Those parameters are unrelated to kvm\VirtIO drivers , rather general Windows settings.		Those parameters are unrelated to kvm\VirtIO drivers , rather general Windows settings.
	After changing those setting reboot is required for the changes to effect the system.		After changing those setting reboot is required for the changes to effect the system.

	= Registry settings =		= Windows XP and 2003 registry settings =

			== Registry settings ==

	[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]		[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]
Line 27:		Line 27:
	* "FastSendDatagramThreshold" - controls fast UDP transmit.		* "FastSendDatagramThreshold" - controls fast UDP transmit.

	= Additional links =		== Additional links ==
	* [http://technet.microsoft.com/en-us/library/cc781532(WS.10).aspx Windows Sockets and DNS Registry Parameters]		* [http://technet.microsoft.com/en-us/library/cc781532(WS.10).aspx Windows Sockets and DNS Registry Parameters]
	* [http://support.microsoft.com/kb/235257 Server Does Not Use All Bandwidth Available When Streaming Files with Bit Rates over 100 Kbps]		* [http://support.microsoft.com/kb/235257 Server Does Not Use All Bandwidth Available When Streaming Files with Bit Rates over 100 Kbps]


			= Starting from Vista =

Yan at 10:22, 10 August 2009

2009-08-10T10:22:00Z

← Older revision		Revision as of 06:22, 10 August 2009
Line 8:		Line 8:

	[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]		[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]

	"DefaultSendWindow"=dword:00100000		"DefaultSendWindow"=dword:00100000

	"DefaultReceiveWindow"=dword:00100000		"DefaultReceiveWindow"=dword:00100000

	"FastSendDatagramThreshold"=dword:00004000		"FastSendDatagramThreshold"=dword:00004000


	[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]		[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]

	"Tcp1323Opts"=dword:00000001		"Tcp1323Opts"=dword:00000001

	"TcpWindowSize"=dword:00100000		"TcpWindowSize"=dword:00100000


	* Tcp1323Opts - allows the scaling of the TCP window above 16k. For more info read [http://technet.microsoft.com/en-us/library/cc938205.aspx Tcp1323Opts]		* Tcp1323Opts - allows the scaling of the TCP window above 16k. For more info read [http://technet.microsoft.com/en-us/library/cc938205.aspx Tcp1323Opts]

Yan at 10:20, 10 August 2009

2009-08-10T10:20:36Z

@@ Line 1: / Line 1: @@
 This page describes best practice for configuring Windows TCP\IP related parameters to archive the best performance with Windows guests.
 Those parameters are unrelated to kvm\VirtIO drivers , rather general Windows settings.
@@ Line 5: / Line 7: @@
 = Registry settings =
 = Additional links =
-[http://technet.microsoft.com/en-us/library/cc781532(WS.10).aspx Windows Sockets and DNS Registry Parameters]
+* [http://technet.microsoft.com/en-us/library/cc781532(WS.10).aspx Windows Sockets and DNS Registry Parameters]
-[http://support.microsoft.com/kb/235257 Server Does Not Use All Bandwidth Available When Streaming Files with Bit Rates over 100 Kbps]
+* [http://support.microsoft.com/kb/235257 Server Does Not Use All Bandwidth Available When Streaming Files with Bit Rates over 100 Kbps]

Yan at 10:14, 10 August 2009

2009-08-10T10:14:21Z

New page

This page describes best practice for configuring Windows TCP\IP related parameters to archive the best performance with Windows guests.
Those parameters are unrelated to kvm\VirtIO drivers , rather general Windows settings.
After changing those setting reboot is required for the changes to effect the system.

= Registry settings =

= Additional links =
[http://technet.microsoft.com/en-us/library/cc781532(WS.10).aspx Windows Sockets and DNS Registry Parameters]
[http://support.microsoft.com/kb/235257 Server Does Not Use All Bandwidth Available When Streaming Files with Bit Rates over 100 Kbps]