WindowsGuestDrivers/kvmnet/registry: Difference between revisions
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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] | ||
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* "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 = | |||
Revision as of 12:56, 15 January 2011
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.
Windows XP and 2003 registry settings
Registry settings
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters]
"DefaultSendWindow"=dword:00100000
"DefaultReceiveWindow"=dword:00100000
"FastSendDatagramThreshold"=dword:00004000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"Tcp1323Opts"=dword:00000001
"TcpWindowSize"=dword:00100000
- Tcp1323Opts - allows the scaling of the TCP window above 16k. For more info read Tcp1323Opts
- "DefaultSendWindow", "DefaultReceiveWindow" and "TcpWindowSize" control TCP window size
- "FastSendDatagramThreshold" - controls fast UDP transmit.
Additional links
- Windows Sockets and DNS Registry Parameters
- Server Does Not Use All Bandwidth Available When Streaming Files with Bit Rates over 100 Kbps