1. 芯片型号：J5
2. 天工开物开发包 OpenExplorer 版本：OE 1.1.68
3. 问题定位：板上推理性能测试
4. 问题具体描述：
我们用地平线提供的yolov5s模型测试推理性能，用ai_benchmark测试，发现修改workflow_fps.json文件中的"core": 0或者"core": 1,帧率是一样的，正常来说当"core": 0的时候，用的是双核BPU，帧率应该有提升，不知道为什么没有提升。
我用yolov5x的模型，修改这个参数就有大约两倍的帧率提升，但是yolov5s就没有提升，请帮忙解决一下
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