[PR] epoll bthread deal first (brpc)

via GitHub Wed, 13 Nov 2024 03:47:55 -0800


zhengJade opened a new pull request, #2819:
URL: https://github.com/apache/brpc/pull/2819


   ### What problem does this PR solve?
   对 brpc 先有性能做了提升
   
   Problem Summary:
   目前的 brpc 网络事件存在两个问题
   1. epoll 线程和其他 bthread 具有相同优先级，导致 epoll 线程可能被一小段时间在队列中无响应，引起 worker queue 
任务数量分布不均匀，多对一的 steal。
   2.  网络事件无差别 signal，增加了系统调用。
   
   ### What is changed and the side effects?
   epoll 线程不在 queue 中，独立出来
   
   Side effects:
   - Performance effects(性能影响):  性能平均提升 20%-25%
   
   
   - Breaking backward compatibility(向后兼容性):  兼容
   
   
   ### 压测结果
   - worker num：9
   - core: 64
   - arch: Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz
   - 工具 rpc_press
   - proto: echo
   #### 优化前
   - 1w
   
![image](https://github.com/user-attachments/assets/96756597-8b06-468d-b55e-48087e8c32c6)
   - 5w
   
![image](https://github.com/user-attachments/assets/db046275-eda1-472c-840f-a3ccdd2e47ad)
   - 10w
   
![image](https://github.com/user-attachments/assets/51fb79a9-1f7c-46c2-960e-0b4edb682348)
   
   #### 优化后
   1w
   
![image](https://github.com/user-attachments/assets/4ef0541c-b3ff-4671-822d-ec281c61880f)
   - 5w
   
![image](https://github.com/user-attachments/assets/f2e1efca-65bf-4f42-838c-4c85494679d1)
   - 10w
   
![image](https://github.com/user-attachments/assets/df297659-84bc-4050-8f80-17b96a37e78d)
   
   ---
   ### Check List:
   - Please make sure your changes are compilable(请确保你的更改可以通过编译).
   - When providing us with a new feature, it is best to add related 
tests(如果你向我们增加一个新的功能, 请添加相关测试).
   - Please follow [Contributor Covenant Code of 
Conduct](https://github.com/apache/brpc/blob/master/CODE_OF_CONDUCT.md).(请遵循贡献者准则).
   


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[PR] epoll bthread deal first (brpc)

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