[GitHub] [incubator-brpc] wwbmmm commented on pull request #1763: fix rpc_press can't send request equably

[GitBox]

wwbmmm commented on PR #1763:
URL: https://github.com/apache/incubator-brpc/pull/1763#issuecomment-1129570599

   补充一些信息：
   我加了一个bvar Maxer，统计两次请求之前的间隔的最大值：
   ```cpp
   bvar::Maxer<int> g_request_interval;
   bvar::Window<bvar::Maxer<int> > 
g_request_interval_window("max_request_interval", &g_request_interval, 1);
   ```
   发送请求那里：
   ```cpp
   g_request_interval << (end_time - timeq.back());
   ```
   
   然后用异步rpc_press，可以看到这个值是不断在增长的：
   <img width="796" alt="image" 
src="https://user-images.githubusercontent.com/3894631/168960967-53389217-2f6a-4b13-bd53-d087e08671f0.png";>
   
   对应的，latency也在不断增长
   <img width="851" alt="image" 
src="https://user-images.githubusercontent.com/3894631/168961051-3018c76d-5ff3-4d49-9d44-60bd245bf2e6.png";>
   
   而cpu（无论是rpc press还是server端）则呈现先下降后增长的状态：
   <img width="827" alt="image" 
src="https://user-images.githubusercontent.com/3894631/168961141-bf39770d-5959-45ac-971f-a86b4a6170cb.png";>
   


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