Introduction

In this practice, the Kunpeng Performance Boundary Analyzer is used to quickly identify the problem scope. Preliminary results indicate a high branch misprediction rate, with the performance bottleneck located in microarchitectural metrics. The System Profiler is then used for deeper microarchitectural analysis, revealing a high CPU misprediction rate for conditional branches. Further inspection of the source code shows that the issue is caused by using data in conditional statements before it has been properly processed. To address this problem, the data is sorted in the source code, optimizing CPU branch prediction, increasing the branch prediction success rate, and improving overall application performance.