Solve the problem of intel12 generation core CPU [small core full, large core onlookers] (win11)

This article seems to have nothing to do with software , Actually, it has a great influence .
You can skip the boring recording process , Look directly at the solution ：）

（ One ） Causes and problems

1.1 upgrade 12 Generation core

Upgrade the desktop computer at home a few days ago ,CPU The picture is cheap and uses the one without nucleus Intel12 Generation of core QS edition .
Reference link ： Parameters .
as well as ：《 The first 12 On behalf of Intel core Hybrid Technology How to work 》
Its own operating system is Win11 了 , So I didn't reinstall （ The test conditions are more fair ）.

This generation and the past Intel Processors are different , For the first time, the design of large and small cores is used （ Of course, nuclear size is a folk saying ）.

• Big nucleus （ Performance core ）：Performance-core, abbreviation p-core.
• Micronucleus （ Efficiency core ）：Efficient-core, abbreviation e-core.

This one is specific CPU Yes 8 individual p-core,8 individual e-core. adopt BIOS switch e-core You can get different combinations of core numbers .
So here we go 8P8E For short, the default full open 8 individual p-core,8 individual e-core.
and 8P0E Is to close all e-core.

1.2 The running speed of the program is worrying

I'm very happy after the upgrade , I immediately tested it with my own program ：

The whole core 8P8E I used it 35 second ,
Than before upgrading i9-9900(ES) Of 40 second Only a little faster .
Than the company's i9-9900KS Server's 28 second More than a little slower , Is slow , Slow down , Slow down ……

The observed phenomenon is probably what the following task manager looks like ：
The small core is full （ Last 8 individual ）,
The big core is idle （ front 16 individual : Multithreading x2）.

Try a few of your own programs again , The result is almost .
adopt BIOS Medium close small core , The test is much faster again .
About the following ：

Program	8P + 8E	8P + 0E	9900(ES)	9900KS	Company
Go Multithreading	35	26	40	28	second
Pascal Single thread	68	48	79	70	second
Spark on VM	120	60	80		second

Repeatedly switch on and off the machine to test various conditions .
It is similar to the conclusion on the Internet , A very strange summary comes ：

• The program indicates 16 Threads or more , It will only be full 8 A small core .
• Step by step BIOS Reduce the small core ：8->6->4->2->1. Even if only 1 A small nucleus will only be full of small nuclei , The big core continues to watch （ The program is extremely slow ）.
• Only completely close the small core , Only then can the big nucleus normally participate in the work ,CPU You can also use 100%.

（ Two ） Theoretical achievements are displayed

Although the actual program testing is hard ……
But under various evaluation software , There is no such problem , The performance is strong enough to break the ceiling .

2.1 CPU-Z

2.1.1 【8P0E】

2.1.2 【8P8E】

2.2 Aunt Lu

Also called entertainment master , But it seems that everyone likes her ……

2.2.1 【8P0E】

2.2.2 【8P8E】

2.3 Other test software

Self testing CB edition R15,R20 The results are basically the same , It looks very good .
Chess doesn't seem to recognize the size of the core , The result is a little strange .
For more tests, please see professional evaluation .
In short, the evaluation results of the software are good ！！！ Poor operation of actual program ！！！

（ 3、 ... and ） solve ： Set the power mode

️ Notice that it's not Power scheme in the control panel , Keep there equilibrium Don't move .

3.1 Set up

Get into : Set up -> System -> Power Supply -> Power mode -> Best performance .
Here's the picture , You don't even need to restart ：

Add ： On the other one is not 12 Generation core CPU On .
Same location , No, Power mode This setting . Here's the picture ：

3.2 The test again

The test again , It is observed from the task manager that the big core is also normally involved in work ：）
The supplementary figure is as follows , The task is much faster , The screenshot is complete …… Khan, .

Tested that the small core just now is full , The procedure of big nuclear onlookers , This time it's just 17 second .
Than 8P0E Of 26 second Significantly improve , Than before setting the power mode 8P8E Under the 35 second It's a big difference .

give the result as follows ：

Program	8P + 8E	8P + 0E	8P8E performance	9900(ES)	9900KS	Company
Go Multithreading	35	26	17	40	28	second
Pascal Single thread	68	48	59	79	70	second
Spark on VM	120	60	54	80		second

PS： Best performance In mode , Observe that single threaded programs still switch between cores , Most of the time it runs on small cores ……
It seems that the scheduling and Win10 Dissimilarity , And not satisfied CPU It may fall on the small core ... This In addition, continue to study .

Multithreaded program running log ：

（ Four ） Discuss

4.1 Operating system and size core scheduling

The news from the Internet is , must Win11 To properly schedule the size of the core .
It is also said that Win10 In fact, there is already （ because ARM qualcomm CPU Well ） But the scheduling strategy is not open .

I don't see anything about Win11 It must be opened 【 Best performance 】 Pattern …… Or I don't look carefully .
In short, a lot of time was wasted in the process ……

Unwilling to turn off the small core ...
If you turn off the small core , That is, an enhanced version 9900KS 了 ...

4.2 The core of efficiency is not weak

From the test results , The small core is not weak .

I found This detailed evaluation I mentioned ,
After rough calculation ,12 Generation nuclei are equivalent to 9 Generation normal core runs in 3.7GHz Frequency .

Except for no hyper threading , I won't support it AVX512, Just buy one and get one free ：）

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Last , I still hope to exchange small cores for large ones .
If you have to add a limit , that 8 Change a small core 4 A big core

Add ： Let's meet each other halfway Intel,8 Change a small core 2 A big core is ok