> On Tue, Oct 29, 2019 at 3:17 PM Simon Matter <simon.mat...@invoca.ch> > wrote: >> >> So you have 4 real cores, not 8. From how I understand it one fully used >> core (one of the 4) can have a negative impact on its (virtual) sibling. > > Yes, but why does the following command have absolutely no negative > impact on my network latency while shorewall reload does? > > # stress -v --cpu 8 --timeout 60 > stress: info: [8225] dispatching hogs: 8 cpu, 0 io, 0 vm, 0 hdd
I think you example of stress is exactly where Hyper Threading shines and works well. Shorewall reload is something else because it also involves I/O and probably memory interaction. Whenever I saw slowdowns on servers like what you experience here, most of the time it was not directly CPU related. Simon _______________________________________________ Shorewall-users mailing list Shorewall-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/shorewall-users
