• Win 10 Auto Tuning Disabled
• Auto Tuning Level
• Auto Tuning Win 10 Game

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Applies To: Windows Server 2012

• Jan 20, 2019 Windows 10 have an auto-tuning feature which tries to dynamically adjust the receive buffer size for transmission and latency of the link. In-fact this feature is present in all Modern Operating systems including Windows 10. So, its a Necessary Feature all together as it manages and adjusts Receive buffer size dynamically.
• TCP Receive Window Auto-Tuning. Prior to Windows Server 2008, the network stack used a fixed-size receive-side window that limited the overall potential throughput for connections. One of the most significant changes to the TCP stack is TCP receive window auto-tuning. You can calculate the total throughput of a single connection when you use.
• Intel XTU is a Windows.-based performance-tuning software that enables novice and experienced enthusiasts to overclock, monitor, and stress a system. The software interface exposes a set of robust capabilities common in most enthusiast platforms along with new features available on new Intel® Application Processors and Intel® Motherboards.
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This topic contains the following sections.

Aug 17, 2016. Apr 07, 2020  Auto-tuning Feature in Windows 10 1. Right click on Windows icon and tap or click on command prompt ( Administrator privileges). Open command prompt ( Administrator privileges) and type these following commands.

Determining the correct tuning settings for your network adapter depend on the following variables:

• The network adapter and its feature set

• The type of workload performed by the server

• The server hardware and software resources

• Your performance goals for the server

If your network adapter provides tuning options, you can optimize network throughput and resource usage to achieve optimum throughput based on the parameters described above.

The following sections describe some of your performance tuning options.

Enabling Offload Features

Turning on network adapter offload features is usually beneficial. Sometimes, however, the network adapter is not powerful enough to handle the offload capabilities with high throughput. For example, enabling segmentation offload can reduce the maximum sustainable throughput on some network adapters because of limited hardware resources. However, if the reduced throughput is not expected to be a limitation, you should enable offload capabilities, even for this type of network adapter.

Note

Some network adapters require offload features to be independently enabled for send and receive paths.

Enabling Receive Side Scaling (RSS) for Web Servers

RSS can improve web scalability and performance when there are fewer network adapters than logical processors on the server. When all the web traffic is going through the RSS-capable network adapters, incoming web requests from different connections can be simultaneously processed across different CPUs.

It is important to note that due to the logic in RSS and Hypertext Transfer Protocol (HTTP) for load distribution, performance might be severely degraded if a non-RSS-capable network adapter accepts web traffic on a server that has one or more RSS-capable network adapters. In this circumstance, you should use RSS-capable network adapters or disable RSS on the network adapter properties Advanced Properties tab. To determine whether a network adapter is RSS-capable, you can view the RSS information on the network adapter properties Advanced Properties tab.

RSS Profiles and RSS Queues

RSS predefined profiles are new in Windows Server 2012.

The default profile is NUMA Static, which changes the default behavior from previous versions of the operating system. To get started with RSS Profiles, you can review the available profiles to understand when they are beneficial and how they apply to your network environment and hardware.

For example, if you open Task Manager and review the logical processors on your server, and they seem to be underutilized for receive traffic, you can try increasing the number of RSS queues from the default of 2 to the maximum that is supported by your network adapter. Your network adapter might have options to change the number of RSS queues as part of the driver.

Increasing Network Adapter Resources

For network adapters that allow manual configuration of resources, such as receive and send buffers, you should increase the allocated resources. Some network adapters set their receive buffers low to conserve allocated memory from the host. The low value results in dropped packets and decreased performance. Therefore, for receive-intensive scenarios, we recommend that you increase the receive buffer value to the maximum.

Note

If a network adapter does not expose manual resource configuration, it either dynamically configures the resources, or the resources are set to a fixed value that cannot be changed.

Enabling Interrupt Moderation

To control interrupt moderation, some network adapters expose different interrupt moderation levels, buffer coalescing parameters (sometimes separately for send and receive buffers), or both.

You should consider interrupt moderation for CPU-bound workloads, and consider the trade-off between the host CPU savings and latency versus the increased host CPU savings because of more interrupts and less latency. If the network adapter does not perform interrupt moderation, but it does expose buffer coalescing, increasing the number of coalesced buffers allows more buffers per send or receive, which improves performance.

Performance Tuning for Low Latency Packet Processing

Many network adapters provide options to optimize operating system-induced latency. Latency is the elapsed time between the network driver processing an incoming packet and the network driver sending the packet back. This time is usually measured in microseconds. For comparison, the transmission time for packet transmissions over long distances is usually measured in milliseconds (an order of magnitude larger). This tuning will not reduce the time a packet spends in transit.

Following are some performance tuning suggestions for microsecond-sensitive networks.

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• Set the computer BIOS to High Performance, with C-states disabled. However, note that this is system and BIOS dependent, and some systems will provide higher performance if the operating system controls power management. You can check and adjust your power management settings from Control Panel or by using the powercfg command. For more information, see Powercfg Command-Line Options

• Set the operating system power management profile to High Performance System. Note that this will not work properly if the system BIOS has been set to disable operating system control of power management.

• Enable Static Offloads, for example, UDP Checksums, TCP Checksums, and Send Large Offload (LSO).

• Enable RSS if the traffic is multi-streamed, such as high-volume multicast receive.

• Disable the Interrupt Moderation setting for network card drivers that require the lowest possible latency. Remember, this can use more CPU time and it represents a tradeoff.

• Handle network adapter interrupts and DPCs on a core processor that shares CPU cache with the core that is being used by the program (user thread) that is handling the packet. CPU affinity tuning can be used to direct a process to certain logical processors in conjunction with RSS configuration to accomplish this. Using the same core for the interrupt, DPC, and user mode thread exhibits worse performance as load increases because the ISR, DPC, and thread contend for the use of the core.

System Management Interrupts

Many hardware systems use System Management Interrupts (SMI) for a variety of maintenance functions, including reporting of error correction code (ECC) memory errors, legacy USB compatibility, fan control, and BIOS controlled power management. The SMI is the highest priority interrupt on the system and places the CPU in a management mode, which preempts all other activity while it runs an interrupt service routine, typically contained in BIOS.

Unfortunately, this can result in latency spikes of 100 microseconds or more. If you need to achieve the lowest latency, you should request a BIOS version from your hardware provider that reduces SMIs to the lowest degree possible. These are frequently referred to as “low latency BIOS” or “SMI free BIOS.” In some cases, it is not possible for a hardware platform to eliminate SMI activity altogether because it is used to control essential functions (for example, cooling fans).

Note

The operating system can exert no control over SMIs because the logical processor is running in a special maintenance mode, which prevents operating system intervention.

Performance Tuning TCP

You can performance tune TCP using the following items.

Details are provided in the following sections.

TCP Receive Window Auto-Tuning

Prior to Windows Server 2008, the network stack used a fixed-size receive-side window that limited the overall potential throughput for connections. One of the most significant changes to the TCP stack is TCP receive window auto-tuning. You can calculate the total throughput of a single connection when you use this fixed size default as:

Total achievable throughput in bytes = TCP window * (1 / connection latency)

For example, the total achievable throughput is only 51 Mbps on a 1 GB connection with 10 ms latency – which is a reasonable value for a large corporate network infrastructure.

With auto-tuning, however, the receive-side window is adjustable, and it can grow to meet the demands of the sender. It is entirely possible for a connection to achieve the full line rate of a 1 GB connection. Network usage scenarios that might have been limited in the past by the total achievable throughput of TCP connections can now fully use the network.

Windows Filtering Platform

The Windows Filtering Platform (WFP) that was introduced in Windows Vista and Windows Server 2008 provides APIs to non-Microsoft independent software vendors (ISVs) to create packet processing filters. Examples include firewall and antivirus software.

Note

A poorly written WFP filter can significantly decrease a server’s networking performance.

For more information, see Windows Filtering Platform in the Windows Dev Center.

TCP Parameters

The following registry keywords from Windows Server 2003 are no longer supported, and they are ignored in Windows Server 2012, Windows Server 2008 R2, and Windows Server 2008.

• TcpWindowSize

• NumTcbTablePartitions

• MaxHashTableSize

Now that you are here, you must be facing Windows 10 slow file transfer problem. Here's the thing: the copy speed is normal in Windows 7, about 200MB/s; however, it drops incredibly to 0-5MB/s in Windows 10. You need to figure out what exactly causes the slow file transfer issue or change the way of Windows 10 file transfer on your PC or laptop.

Very slow file transfer in Windows 10 can result from several factors, including network problems, external drives problems, or computer problems. In this post, we will try to help you increase file transfer speed in Windows 10 by solving these three major issues. You can choose the methods that work best for you. Furthermore, we strongly recommend that you use EaseUS PC transfer software for quick and easy file tranfer.

Solutions to Slow USB Transfer in Windows 10

Copying files between USB drives and computers is one of the most basic ways to share data. But lots of users complain that their PCs are transferring files very slowly on Windows 10. The easiest way you can try is to use a different USB port/cable or check/update the USB drivers if they are outdated. If the situation doesn't improve, continue to use the following advanced solutions.

1. Check USB or Hard Drive for Corruption

The first step to fix the slow USB transfer issue is checking its state. You can use the Windows built-in tool for help. Once you start the process, it will find the corrupted sectors and fix them if needed.

Step 1. Open 'This PC' or 'File Explorer'.

Step 2. Right-click on the USB drive or hard drive and click 'Properties'.

Step 3. Click the 'Tool' tab. Under the 'Error checking' section, click 'Check'.

• Relevant reading: How to Fix USB flash drive not showing up in Windows 10/8/7

2. Change the Removal Policy for UBS Drive/HDD

The external USB drive or HDD on your computer provides you with a Quick removal policy that avoids caching and Better performance policy that writes caching. If your USB flash drive is small-sizes, you'd better choose the former one. While if you are using an external hard drive to move large files, the Better performance policy is more appropriate. Let's see how to change the Removal policy.

Step 1. Plugin in your USB or external hard drive to the PC.

Step 2. Click 'Start', type Device Manager, and open it.

Step 3. Expand the 'Disk drives'. Then, right-click on the target drive. Open 'Properties' and select 'Policy'.

Step 4. Choose a Quick removal policy for USB flash drive and Better performance policy for the external hard drive.

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3. Format USB Flash Drive to NTFS

After you convert the USB drive from FAT 32 to NTFS, there may be visible improvements in the transfer speed. If you don't know how to format a USB flash drive to NTFS, follow this link to see details: Format USB flash drive to NTFS in Windows 10/8/7.

Fixes for Windows 10 Slow Network File Transfer

Some people may find that the network data transfer becomes very slow in Windows 10. To solve the problem, two approaches below are worth trying.

1. Disable Windows Auto-Tuning

If you are copying some data over the network, the auto-tuning feature can improve the performance for programs that receive TCP data over a network. But in some situations, disabling this feature might bring a faster copy speed.

Step 1. Press Windows key + X and select Command Prompt(Admin).

Step 2. Type netsh int tcp set global autotuninglevel=disabled and press Enter.

Step 3. Now try to transfer the files and check the data transfer speed. You can go to Command Prompt(Admin) again and type netsh int tcp set global autotuninglevel=normal and press Enter to turn on the Auto-tuning again.

2. Turn off RDC (Remote Differential Compression)

The Remote Differential Compression feature can cause the slow network file transfer in Windows 10. To fix this problem, you need to disable this feature on your PCs by doing the following.

Step 1. Press Windows Key + S and enter windows features. Click 'Turn Windows features on or off'.

Step 2. Find and uncheck Remote Differential Compression and click 'OK'.

Step 3. Restart your PC. You need to repeat this on all the computers on your network. After that, check if the problem is still there.

Methods for Windows 10 Slow File Transfer on Hard Drives/Disks

The slow data transfer also can be hardware or computer issues. You might be able to fix this simply by disabling certain antivirus or cleaning up temporary cache files. If these don't work, move to increase the disk transfer speed from the following points.

1. Disable Drive Indexing

Windows offers Drive Indexing feature to index all files and substantially reduce the waiting time when you search for them in File Explorer. However, it can slow the data transfer speed if it starts indexing data while the copying is still going on. So, we suggest that you can temporarily disable Drive Indexing for a trial.

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Step 1. Open 'This PC' or 'File Explorer'.

Step 2. Select the partition you want to turn off the indexing feature. Right-click it and click 'Properties'.

Step 3. Uncheck the 'Allow files on this drive to have contents indexed in addition to file properties' box and restart your PC to enable the function.

2. Convert File System from FAT to NTFS

EaseUS Partition Master Free allows users to convert FAT to NTFS without losing data effortlessly. Now, download this free partition manager software, and let's begin.

Step 1: Install and launch EaseUS Partition Master on your computer.

Step 2: Select a FAT32 partition, right-click on it and select 'Convert to NTFS'. If you need to convert a storage device such as SD card or USB flash drive to NTFS, insert it into your PC first and repeat the previous operation.

Step 3: Click 'OK' on the pop-up dialog box to continue.

Step 4: Go to the upper left corner, click the 'Execute 1 Operation' button and you will see the operation details. Click 'Apply' and 'Finish' when the process completes.

3. Defrag HDD or USB Flash Drive

Don't close the EaseUS Partition Master program when finished file system conversion. You can also rely on its other feature of hard disk optimization, which helps significantly in accelerating the hard drive file transfer speed in Windows 10.

Step 1: Install and launch EaseUS Partition Master. Select 'Tools' and click 'System Optimization'.

Step 2: Choose 'Disk Optimization' to optimize your hard disk and improve the disk performance.

Step 3: Select the partition that you want to optimize and click 'Optimize'. After a while, the defragment completes. The time depends on the amount of the fragments on this partition.

4. Check and Repair System Errors

Win 10 Auto Tuning Disabled

Corrupted Windows 10 file system could disable, interrupt, or slow down the file transfer speed, so let's use the System Maintenance Troubleshooter to repair the wrong files.

Step 1. Open Control Panel and click on the Troubleshooting icon.

Step 2. Select View all in the top left corner.

Step 3. Run System Maintenance Troubleshooter.

Methods Summary

Whether it is a network transfer, USB data copying, or a hard disk data migration, slow file transfer in Windows may be caused by a variety of reasons. If the network transfer is delayed, you can try to find a solution from the network and computer problems. If the USB moving is not fast, you can find the reason from the USB drive and your computer. I hope the above solution can help you effectively.

Finally, if none of the previous solutions help you deal with the slow file copying issue, it's time to try some third-party tools to speed up the transfer. Here, we'd like to recommend you try EaseUS Todo PCTrans.

EaseUS Todo PCTrans - Fast Windows 10 File Transfer Software

EaseUS Todo PCTrans is a powerful and easy-to-use PC data transfer tool. You don't need to worry about the transfer speed at all in Windows 10 with this program, because you have many transfer plans. You can transfer unlimited files quickly from PC to PC, or from PC to an external storage device with or without the network. What's more, the App Migration mode allows you to transfer applications between drives/disks locally. For instance, transfer programs from C drive to D drive without any start-up problem.

Step 1. Open EaseUS Todo PCTrans on both of your computers. Choose 'PC to PC' to go to the next step.

Step 2. Connect two PCs via the network by following the simple interface guides. Besides, make sure you have chosen the right transfer direction.

Auto Tuning Level

Step 3. Then, choose 'Files' and click 'Edit' to select files to transfer.

Step 4. Select the specific files as you want. What’s more, you can click the Edit icon to customize the storage path for transferred data.

Auto Tuning Win 10 Game

Step 5. Now, click 'Finish' and 'Transfer' to begin to transfer files from PC to PC. The size of the file determines the transfer time. Wait patiently.