So I have a feeling that we need to find whoever wrote this device driver and show them how to do threaded DPCs, and not to explicitly set an affinity on kernel threads, etc. I wonder why the dispatcher seems to be only scheduling the thread to run on that one seemingly arbitrary core. Windows app samples are now available through GitHub. What bugs me (no pun intended) about this scenario though is that it appears as though whatever kernel thread that is doing this seems to be affinitized to that one core. To install through Windows Update, make sure you install the latest recommended updates and patches from Microsoft Update before you install the Windows SDK. If you find your CPU spending an inordinate amount of time on these interrupts, that usually indicates a faulty device driver that needs to be updated. (ISRs) When an interrupt occurs, user mode work is suspended on that processor, and the CPU runs the ISR registered to that interrupt. When a CPU is doing work in kernel mode, it's mostly running interrupt service routines. Xperf replaces the old Kernrate tool, and can net you some extremely detailed data. xperf -on PROC_THREAD+LOADER+DPC+INTERRUPTĪnd stop recording with xperf -d logfile.etl If you set up the symbol server, you should see the name of a function within a module (unless the module is non-Microsoft,) else you'll just see a numerical offset from the module's start address.Īlternatively, use Xperf from the Windows Performance Toolkit to profile interrupts, DPCs, etc. If it's NDIS.sys, for instance, that's a network interface driver. If you look at the module listed under Start Address, it should give you a clue as to what the work is related to. The thread that's causing all this kernel mode work should be here. Right click the System "process" and go to Properties. Make sure you are running with full UAC elevation. If the process with the highest Privileged Processor Time is System, which I suspect it is, then it's a little more complicated. If that process is not "System," then you've just figured out what user mode process is causing this CPU usage. The process at the top of the list is the process currently using the most kernel mode CPU time right now. ![]() Sort-Object PrivilegedProcessorTime -Descending Running Powershell as administrator, type: Get-Process | Select Name, PrivilegedProcessorTime | ` ![]() You can find more info about your device below its image, including your device age and storage amounts. Select Rename your PC to give your device a different name.As others have already pointed out, we can see from that screenshot that the CPU that's working so hard is spending all its time in kernel mode. Select Tips on PC Health to learn more ways to improve your device performance. does anyone know what it could be, or how to fix this visual-studio sdk windows-10 Share Improve this question Follow asked at 19:34 Dito 182 3 12 1 1612 ERRORINSTALLSOURCEABSENT. Get info on the startup time for your device, along with more info about what affects these times. Select Manage your startup programs to review and change your startup apps. It seems like something is missing or broken in my system. Select Manage storage settings to turn on Storage Sense or get other cleanup recommendations. See how much storage space is being used for your device’s main drive, which contains your files, apps, and Windows. You’ll see the percentage your drive is full.Įxpand this section of the app for info on how much free space is left. Select See battery saving tips for steps you can take to improve battery. Battery capacity will be available for devices older than 3 years. Use this section of PC Health Check to get info on how your batteries are performing compared to their original capacity for devices with one or two batteries. Select Open Windows Update to go right to Windows Update in Settings. If your device isn’t up to date or needs attention, PC Health Check will let you know. Regular Windows updates help keep your device running smoothly and securely. You can also back up your photos and files to OneDrive. They’ll then be protected and accessible across your devices. ![]() Sign in with your Microsoft account or create a new one to sync your preferences across your devices, such as passwords, Microsoft Edge browser settings like favorites and reading lists, themes, and more. Select Check now to see if your device can run Windows 11. If you’re currently running Windows 10, PC Health Check provides a comprehensive eligibility check for your device to ensure it meets the Windows 11 minimum system requirements. You’ll get info on why your device is or isn’t eligible, plus info on what you can do if your device doesn’t meet the requirements.
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