Windows 10: different cpu usage in "processes" and "details" of task manager

Hi,


I found that the cpu usage of an arbitrary process are not the same in tabs "processes" and "details" of task manager.

For example, I write a simple c++ program foo.exe as below:

int i;

while 1 { i++; };

The cpu usage in "processes" tab vary in the range 20%~30%, and the cpu usage in "details" tab is about 12% and much stable.


My questions are:
1. Why does these differences happen?

2. Are there offcial documents of task manager and resource moninor?


My cpu is i5-8265u, running on win10.


Thanks,

Chris PN

:)

 

Task Manager High CPU Usage

I have the same problem myself with it only happens when I scroll through task manager and open and close it. I don't know this for sure but the reason this probably happens is that you may have a lot of processes running and task manager is using a lot
of the CPU to process the usage of each program.

What I have done is disable data that I don't need to see like network usage and GPU usage and it drops the CPU usage a bit. I have also enabled everything and scrolled up and down on it and task manager uses almost twice as much.

I would suggest disabling everything but CPU, disk, and RAM, (I would not suggest having GPU on because it is almost always at 99% unless you have FPS limits).

 

Task Manager has different CPU Usage

I noticed that my Task Manager CPU Usage is different percent value from Rainmeter and Process Explorer. Sometimes On Task Manager CPU Usage reaches 100% sometimes I get lag and sometimes I don't lag at all even its 100%.

Windows: Windows 10 v1903

Processor: Intel core i5 8250u

 

Task Manager has different CPU Usage

Hi,I am Vanshita, an Independent Windows Advisor. I am here to work with you on this problem.

I suggest you to go through the below steps and check if it helps.

https://answers.microsoft.com/en-us/windows/for...

Thank you