Chimney Offload State - Enable or Disable

Brink

Staff member
mvp
ByLine
How to Enable or Disable the Chimney Offload State in Vista
Synopsis
This will show you how to enable or disable the TCP Chimney Offload State to offload TCP processing for a network connection from the CPU to the network adapter instead.
How to Enable or Disable the Chimney Offload State in Vista

information   Information
This will show you how to enable or disable the TCP Chimney Offload State to offload TCP processing for a network connection from the CPU to the network adapter instead. This helps improve the processing of network data on your computer or server without the need for additional programs or any loss to manageability or security. Programs that are currently bound by network processing overhead will generally scale better when used with TCP Chimney Offload. For more information about this, see Information about the TCP Chimney Offload, Receive Side Scaling, and Network Direct Memory Access features in Windows Server 2008 and What is TCP Chimney Offload? - Windows Vista Help.
Tip   Tip
"The goal of TCP Chimney is to reduce CPU utilization and increase network throughput for long-lived TCP connections with bulk transfers and applications that pre-post buffers. Moving TCP processing tasks to hardware frees up the server's CPU for other application tasks."
Full read at: http://technet.microsoft.com/en-us/network/dd277645.aspx

Note   Note
The TCP Chimney Offload State is enabled by default in Vista. It is recommended to have this enabled. You can test to see how your network connection speed works with either setting.


Here's How:
1. To See the Current TCP Settings
B) Click on Continue in the UAC prompt.​
C) In the elevated command prompt, copy and paste the command below and press Enter. (See screenshot below)​
netsh interface tcp show global
Default_Settings.jpg

2. To Enable the Chimney Offload State
A) In the elevated command prompt, copy and paste the command below and press Enter. (See screenshot below)​
netsh int tcp set global chimney=enabled

B) You will get a OK response if successful. If not, repeat step 2A.​
C) Go to step 4.​
Enable.jpg

3. To Disable the Chimney Offload State
A) In the elevated command prompt, copy and paste the command below and press Enter. (See screenshot below)​
netsh int tcp set global chimney=disable

B) You will get a OK response if successful. If not, repeat step 3A.​
Disable.jpg

4. Repeat step 1 to verify the change.​
5. Close the command prompt when done.​
6. Restart the computer to apply.​
That's it,
Shawn


 

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mansrm81

Vista Guru
Thanks for this tutorial Shawn.
 

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Brink

Staff member
mvp
You'rs welcome Mansrm81.

Shawn
 

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Airbot

---------------
Shawn, I know that you say Chimney Offload and Autotuning are set to enabled and normal by default but I have done a clean install of Home Premium and Ultimate and they were both set to Chimney Offload=Disabled, Autotuning= HighlyRestricted. Could it have anything to do with your network adapter and or Router that determine the setting, as soon as you connect to your router/adapter? Or am I making no sense? lol :geek:
 

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Brink

Staff member
mvp
Hello Aaron,

I'm noticing more people reporting this, so it may be so. The settings in the tutorial are the normal recommended settings. You might try either way to see if you notice a difference between them.
 

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NormCameron

Vista Guru
Just read this. Nice one. Thanks mate

Norm
 

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Brink

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mvp
You're welcome Norm.

Shawn
 

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rickrode

New Member
Hi Shawn,

I try step no. 2 of this tutorial enabling chimney offload state but I received a message "set global command failed on IPV4 the requested operation requires elevation" any help or additional info on this issue.


Rickrode
 

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Brink

Staff member
mvp
Hello Rickrode,

You will just need to open a elevated command prompt with administrator rights, as per step 1, instead of a normal command prompt. ;)

Hope this helps,
Shawn
 

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Brink

Staff member
mvp
You're welcome Rickrode. I'm happy to hear that you got an improvement.

Shawn
 

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    Corsair Hydro H115i
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    Logitech MX Master
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    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB8200 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD

dinesh

Vista Expert
Vista Guru
"The goal of TCP Chimney is to reduce CPU utilization and increase network throughput for long-lived TCP connections with bulk transfers and applications that pre-post buffers. Moving TCP processing tasks to hardware frees up the server's CPU for other application tasks."
Full read: http://technet.microsoft.com/en-us/network/dd277645.aspx
Hi shawn, just read this at technet. But dont you think changing this setting will cause a slow performance while using other applications? I have not tried it yet. But will try it today and will post the difference.
 

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Brink

Staff member
mvp
Thank you Dinesh. I have added it for more information. :)
 

My Computers

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    ASUS ROG Maximus XI Formula Z390
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    1TB Samsung 970 EVO Plus M.2,
    250GB Samsung 960 EVO M.2,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
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    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB8200 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD

brummyfan

Brummy
Vista Guru
Thank you Shawn for this Tutorial as it made a difference in performance.
 

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Brink

Staff member
mvp
You're welcome Brummy. :)
 

My Computers

System One System Two

  • Operating System
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    Intel i7-8700K 5 GHz
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    ASUS ROG Maximus XI Formula Z390
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    1TB Samsung 970 EVO Plus M.2,
    250GB Samsung 960 EVO M.2,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Mouse
    Logitech MX Master
    Keyboard
    Logitech wireless K800
    Internet Speed
    1 Gb/s Download and 35 Mb/s Upload
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB8200 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
  • Operating System
    Windows 10 Pro
    Manufacturer/Model
    HP Envy Y0F94AV
    CPU
    i7-7500U @ 2.70 GHz
    Memory
    16 GB DDR4-2133
    Graphics card(s)
    NVIDIA GeForce 940MX
    Sound Card
    Conexant ISST Audio
    Monitor(s) Displays
    17.3" UHD IPS touch
    Screen Resolution
    3480 x 2160
    Hard Drives
    512 GB M.2 SSD
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