CPU constantly at 100% in task manager

Do you have Microsoft Storage Sense enabled?

Callender said:

So you didn't understand. Change the active plan to some other plan and change max/ min processor state values (not CPU) to something other than min %100 and max %100

Just as a test.

Attachment 318822

If that has no effect then I don't have other suggestions.

That is exactly what I did previously. I tried setting max to 80% to test and task managers cpu displays constant 80% instead of 100% on the performance tab and 80% above the cpu column in the users tab. Sadly it has no effect but thank you for the suggestion.

Unless I am mistaken your cpu usage is all kernel usage, not userland. Possible interrupt storm or something else crazy going on?

Chrysalis said:

Unless I am mistaken your cpu usage is all kernel usage, not userland. Possible interrupt storm or something else crazy going on?

Sorry but what is an interrupt storm?

dogfacedponysco said:

Sorry but what is an interrupt storm?

When a device generates many more interrupts than it normally would, this would translate into system cpu usage.

In task manager when you right click the cpu graph you will see an option to show kernel usage, if I am understanding your graph right, your cpu usage is almost all filled by kernel usage.

Sysinternals process explorer has a system cpu usage section which might give some insight.

Yes they are pretty much maxed when I include kernel usage too. But process explorer shows different. How on earth can I solve this?? Or should I need to worry.

Ok that confirms it is kernel not userland, this is why you not seeing the usage on process and detailed list.

I am attaching to show you what I mean for checking interrupts in process explorer.

Download the tool here https://docs.microsoft.com/en-us/sys...ocess-explorer

Thanks. This is what I get from Process Explorer



Just before seeing this I got a BSOD for the first time in ages. Something is up ofc but I have no idea what it could be. I tried updating drivers etc but still no joy.

Ok so it isn't interrupts, but sadly I have no idea what it might be. Process explorer even see's it as idle usage, it doesnt show it at all, so when you made that screenshot, was task manager still reporting 100% usage?