今天想更新一下 linux 内核，无意间发现有-generic、-lowlatency -azure -gcp 等好几种，google 搜了下，看到 ubuntu 社区有个 tips:
If you do not require low latency for your system then please use the -generic kernel.
If you need a low latency system (e.g. for recording audio) then please use the -preempt kernel as a fist choice. This reduces latency but doesn’t sacrifice power saving features. It is available only for 64 bit systems (also called amd64).
If the -preempt kernel does not provide enough low latency for your needs (or you have an 32 bit system) then you should try the -lowlatency kernel.
If the -lowlatency kernel isn’t enough then you should try the -rt kernel
If the -rt kernel isn’t enough stable for you then you should try the -realtime kernel