[QCA6174] sdx12平台 QCA6174 TR398 6.2.1测试TX UDP吞吐量只有200Mbps，RX有244Mbps左右问题分析及解决方案

TR398 6.2.1

1. For each of the test configuration, Packet Error Rate(PER) for each STA SHALL achieve less than 1%
2.For each of the test configuration,the overall throughput of all connected STA Shall achieve:
   a) For 32 connected STA(802.11n) both downlink and uplink summed throughput shall be not less than 64Mbps*99%
   b) For 32  connected STA(802.11ac) both downlink and uplink summed throughput shall be not less than 256Mbps*99%
 

问题描述

TR398测试6.2.1的时候发现UDP的TX流量低于RX 40Mbps, RX可以跑到244Mbps，但是TX只有200Mbps

问题分析

WiFi RX的时候芯片温度很低，测试的时候查看只有72℃左右，但是TX的时候可以看到温度达到了97℃，温度的升高就会导致CPU的降频

解决方案

修改cpu

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
ondemand
修改为performance
echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

查看cpu频率

# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq