EFI Stub is working now, thanks again. Latency isn't affected by EFI on this particular board (ASUS TUF B450M-Plus Gaming) with Ryzen 2200G and BIOS version 1003 (dated 2019/04/30 -- Latest as of this writing.) Alec On Mon, Jun 10, 2019 at 9:47 PM Alec Ari <neotheuser@xxxxxxxxx> wrote: > > Hi, > > Thank you, Scott! That explains everything, appreciate it! I wanted to > do latency testing with PREEMPT_RT under EFI and couldn't figure out > what I was doing wrong. > > Alec