Fixing High DPC Latency Issues with nvme.sys (NVM Express Controller) on Windows 11
Windows 11, the latest operating system from Microsoft, is built on top of Windows 10 and shares many of its components, including the NVM Express controller, nvme.sys. However, some users have reported unusable long freezes, which can be traced back to high DPC (Deferred Procedure Call) latency issues with this component.
What is DPC Latency?
DPC latency is the amount of time that the system spends processing DPCs, which are high-priority tasks that can interrupt other system functions. High DPC latency can cause audio and video glitches, as well as system freezes and slowdowns. In the case of nvme.sys, high DPC latency can be caused by a number of factors, including driver issues, hardware compatibility problems, and system resource contention.
Identifying High DPC Latency Issues with nvme.sys
To identify high DPC latency issues with nvme.sys, you can use a tool like LatencyMon, which can help you pinpoint the source of the problem. Once you have identified nvme.sys as the culprit, you can take steps to address the issue.
Fixing High DPC Latency Issues with nvme.sys
There are several steps you can take to fix high DPC latency issues with nvme.sys on Windows 11:
- Update the NVM Express controller driver: Make sure that you are using the latest driver for your NVM Express controller. You can check for updates on the manufacturer's website or through Windows Update.
- Disable power saving mode: Power saving mode can cause high DPC latency issues with nvme.sys. To disable power saving mode, go to Device Manager, expand the "Storage Controllers" section, right-click on your NVM Express controller, select "Properties," go to the "Power Management" tab, and uncheck the "Allow the computer to turn off this device to save power" option.
- Disable the NVMe controller in BIOS: If the above steps do not resolve the issue, you can try disabling the NVMe controller in BIOS. This will prevent Windows from using the NVMe controller and may help reduce DPC latency.
- Upgrade your hardware: If none of the above steps resolve the issue, you may need to upgrade your hardware. Consider upgrading to a newer NVM Express controller or a faster NVMe SSD.
References
- Microsoft. (2021). Windows 11.
- LatencyMon. (2021). LatencyMon - Identify DPC and ISR Latency Issues.
- NVMe Express. (2021). NVM Express Specifications.
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Note: This article is for informational purposes only and is not intended as a substitute for professional advice or guidance. Always consult with a qualified professional before making any changes to your system.