In my server bios I've found such technologies:
I don't use them as I don't use virtualization. I'm using server for HFT trading and so I want to "win" several microseconds disabling features I don't need. If it makes sense?
Under my knowledge, that may not have performance improvement, I have never experienced a Performance improvement disabling these technologies (under my cases these technologies helped me gain performance many times but sometimes decreasing the performance). You should run a Benchmark with those technologies enabled and disabled, that would help you decide.
As far as I know, those are things that your CPU has extra hardware for, so that will not help you with performance. You can disable it as a security measure though.
I don't think so. Those technologies are used whenever required. They don't have any direct impact on CPU performance.
HP provides a comprehensive set of BIOS and tuning parameters for systems intended to be used in low-latency or deterministic environments. I assume HP because you've mentioned ProLiant servers in your other posts here.
Please see:
Configuring and Tuning HP ProLiant Servers for Low-Latency Applications White Paper
In short, I set my trading application servers to disable C-States, use the highest power profile, disable Turbo Boost, and sometimes, disable processor and memory monitoring. I lower the timeouts for the integrated watchdog timer and leave the Intel Virtualization options enabled (for flexibility).
