A loop buffer sits at a CPU's frontend, where it holds a small number of previously fetched instructions.
Intel has apparently disabled the LSD on Skylake (SKL150 erratum) and Kaby Lake (KBL095, KBW095 erratum) chips via a microcode update and on Skylake-X out of the box, due to a bug related to the interaction between hyperthreading and the LSD
Intel has apparently disabled the LSD on Skylake (SKL150 erratum) and Kaby Lake (KBL095, KBW095 erratum) chips via a microcode update and on Skylake-X out of the box, due to a bug related to the interaction between hyperthreading and the LSD