Hi,
Since today i’ve been using on my bgp router ros 5.2 with multi-cpu=no
Today i have upgraded it to 5.7 and turn on in bios HT.
And this is the resoult: http://prntscr.com/39vv9
Not goood - one core has 100% and other is boring.
This situtation is on downloading prefixes.
M.
I think that is a feature. While the BGP process is glued to one core, the other core can handle traffic.
why do you use multi-cpu=no if your cpu have two core?
Missunderstaning - now (on 5.7) multi-cpu=yes
On previous ROS versions i was not sure that this will work so both ht and mcpu was turned off.
Interesting. So one CPU has 100% of usage (and possibilyty of having some errors) and 2nd is doing nothing - grate feature 
M.
I’d look at that differently. There’s no chance that a BGP peer flapping while there’s a lot of customer traffic through the router is going to lock up all cores leading to severely degraded customer experience.
/tool profile
p.s. is it possible to process bgp data loading in parallel threads?..
p.p.s. they suggest not to turn HT on