YARP has a higher cpu usage than Nginx

[doddgu]

Sorry, I don't know if it is a bug.

Describe the bug

I deployed 3 nginx at HongKong, and deployed 3 YARP at HangZhou.

Client -> Nginx -> Yarp -> Service

Nginx forwards some services, and YARP forward one of them.

Nginx CPU

YARP CPU

YARP other metrics

Htop (Cat.Service.dll is based on YARP)

I tried to analyze the CPU on vs
Top function

Module View

To Reproduce

No exception.

Further technical details

• Include the version of the packages you are using
  2.1.0
• The platform (Linux/macOS/Windows)
  Linux

They're all 4c8g, YARP on ubuntu 22.04, nginx on centos.
YARP 2.1.0 runs on .NET 8.

[Tratcher]

How does the load / RPS compare?

[doddgu]

How does the load / RPS compare?

Every YARP is almost 4000

[doddgu]

I loaded pdb.
I find that the Thread in WorkerThreadStart method. The Thread.CurrentThread.SetThreadPoolWorkerThreadName() takes up a lot of CPU resources.

I don't know why have to call WorkerThreadStart so many times.

[doddgu]

I used YARP source code analysis, I found that YARP itself does not have high cpu usage.

[doddgu]

Hi @MihaZupan , any news?

[doddgu]

Is it related to the dotnet/runtime#70098
And I see there's pr to fix it