How to enable more debug logs?

Products Support HiKey 960
#1

I am using a userdebug image, but no any logs from WifiManager, WifiServiceImpl, WifiMonitor etc.

Does any one know how to print out these logs?

ps, I am using logcat. Is there a folder that store the framework logs and kernel logs?

Thanks,
Jasmine Gu

#2

change the debug logs levels for linux kernel maybe