【24.09】树莓派6.6内核性能下降

**【缺陷描述】** 树莓派6.6内核性能下降

**一、缺陷信息**

**【缺陷所属的os版本】**
openEuler 24.09

**【内核版本】（如kernel-5.10.0-60.138.0.165，参考命令"uname -r"结果）**
raspberrypi4 6.6.0-openeuler

**【环境信息】**
硬件信息
24.09树莓派4镜像地址：http://121.36.84.172/dailybuild/EBS-openEuler-24.09/embedded_img/aarch64/raspberrypi4-64-kernel6/20240924112324/

对比用的24.03LTS镜像地址：http://121.36.84.172/dailybuild/EBS-openEuler-24.03-LTS/embedded_img/archive_file_2024-06-06-10-58-1717642682/aarch64/raspberrypi4-64-6.6/

**【问题复现步骤】：请描述具体的操作步骤**
Unixbench性能测试
```bash
git clone https://gitee.com/saarloos/test-tools.git
cd test-tools
unzip make.zip
unzip perl.zip
unzip UnixBench.zip
cd UnixBench
# 配置sdk
make clean
make
sed -i "1767d" Run
sed -i "173d" Run
cd ..
scp -r perl/* make/* root@<树莓派ip>:/
scp -r UnixBench  root@<树莓派ip>:/root/
```
到树莓派之后
```bash
cd ~/UnixBench
# 应该输出600000
cat /sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq 
./Run -c 1 -c `nproc` -i 3 > test_1.log
echo "performance" > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
# 应该输出1500000
cat /sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq
./Run -c 1 -c `nproc` -i 3 > test_2.log

cd ~
mkdir -p boot
mount /dev/mmcblk0p1 boot
echo "
over_voltage=3
arm_freq=1800
" >> boot/config.txt
reboot
# 重启后
echo "performance" > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
cd ~/UnixBench
# 应该输出1800000
cat /sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq
./Run -c 1 -c `nproc` -i 3 > test_3.log
```
指定context1可以执行Pipe-based Context Switching单项测试
```
./Run -c 1 -c `nproc` -i 3 context1 > xxx.log
```
**【实际结果】**
Pipe-based Context Switching性能下降

**【期望结果】**
性能正常

**【其他相关附件信息】**
![输入图片说明](https://foruda.gitee.com/images/1726735991826224503/dc00f0fa_9634788.png "屏幕截图")

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