Windows 10

I took the risk, installed Windows 10 on my new PC instead of my (beloved) Windows 7. I already regret it. Normally on all my previous PC's when I start a test using the number cores task management correctly states a 50% CPU usage. Not so on Windows 10, 59% while nothing else is running in the background.

And it gets worse, the PC has 24 cores and 48 threads, when I use 24 cores I get a good CPU division, see example picture, they all nicely are in the 18,000 range.



However when I increase the number of threads, say 30, the Windows 10 scheduler gets mad and numbers start to fluctuate, from 14,000 to 20,000 and as a result the analysis takes hours longer. Doesn't happen on my Windows 7 computer, I can use all threads and numbers don't fluctuate.

And so the question arises if this is a (known) Windows 10 scheduler problem or that there is a processor problem.

And here are 2 screenshots, left the Windows 7 scheduler and right the Windows 10.

Windows 7 nicely divides the work over the number of cores, Windows 10 not.

Hello Ed. Did you do all the updates to Windows 10. After upgrading or downgrading

I ran resource monitor using Stockfish with 16 cores of 32 threads. And it does display correctly 50%. But show 17 threads being used. And shows 60% usage.
I am not sure if this is good or bad. It maybe a way for windows 10 to keep all cores active, and just not spinning.  

mwyoung wrote:

I ran resource monitor using Stockfish with 16 cores of 32 threads. And it does display correctly 50%. But show 17 threads being used. And shows 60% usage.

I think it's bad, doesn't happen with W7.

Try - https://www.alcpu.com/CoreTemp/

It's also shows you the usage of each thread and maybe you could check 20 or 24 cores?

mwyoung wrote:

Hello Ed.  Did you do all the updates to Windows 10. After upgrading or downgrading

Not yet.

Admin wrote:

mwyoung wrote:

I ran resource monitor using Stockfish with 16 cores of 32 threads. And it does display correctly 50%. But show 17 threads being used. And shows 60% usage.

I think it's bad, doesn't happen with W7.

Try - https://www.alcpu.com/CoreTemp/

It's also shows you the usage of each thread and maybe you could check 20 or 24 cores?

mwyoung wrote:

Hello Ed.  Did you do all the updates to Windows 10. After upgrading or downgrading

Not yet.

I guess the only way to know for sure. Is to bench a multi core engine with windows 7 and windows 10. And see how the engine truly performs.
And I am not able to run this test. As I am only running windows 10.

I found this for choosing a Linux version - link - but nothing for choosing a windows version or for choosing between Windows, Chrome OS, Linux and MacOS.

Well, back to W7 then.