My machine has a Core i7-4790 Haswell processor. I am aware that the following prefetchers are built in and enabled:
Is there a built-in DRAM-cache prefetcher as well (not DRAM-disk)? If so, is there a way to turn it on/off from either the BIOS or possible from the Linux terminal?
This option will be available in the BIOS depending on what the Computer Manufacture left unlocked. On Intel® motherboards, this feature is not available. From Linux terminal, I am not sure if it can be enabled but perhaps other users can share their Linux experiences.
You can also post your question on Linux communities to get more information about the terminal configuration for these purposes.