R620 duel xeon e5-2680 v2

Hardware
1

Does Ipfire limit the system to only use one processor? or is it that the smt is disabled and that’s why Htop shows 20 threads as offline

2

I believe SMT is disabled because of Meltdown & Spectre. See these two blogs and one Wiki page:

3

Meltdown and Spectre is not the reason for disabling smt but if the cpu is affected for Foreshadow or Fallout/ZombieLoad/RIDL IPFire disable SMT if you not force it (which is a bad idea)

https://git.ipfire.org/?p=ipfire-2.x.git;a=blob;f=src/initscripts/system/smt;h=274ec4bbaf413dd74e09e1ad1af6310cee1026ae;hb=0e457b13eaf61b2830919e3745df3956e2042640

4 Likes
4

thanks for the input