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jalokim
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Not equal cpu usage on 5.7

Sat Oct 01, 2011 2:13 am

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.
 
sigxcpu
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Re: Not equal cpu usage on 5.7

Sat Oct 01, 2011 3:06 am

I think that is a feature. While the BGP process is glued to one core, the other core can handle traffic.
 
rodolfo
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Re: Not equal cpu usage on 5.7

Sat Oct 01, 2011 9:23 pm

why do you use multi-cpu=no if your cpu have two core?
rodolfo
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jalokim
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Re: Not equal cpu usage on 5.7

Sun Oct 02, 2011 2:40 pm

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.
 
jalokim
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Re: Not equal cpu usage on 5.7

Sun Oct 02, 2011 2:40 pm

I think that is a feature. While the BGP process is glued to one core, the other core can handle traffic.
Interesting. So one CPU has 100% of usage (and possibilyty of having some errors) and 2nd is doing nothing - grate feature ;)

M.
 
fewi
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Not equal cpu usage on 5.7

Sun Oct 02, 2011 8:45 pm

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.
Specific answers require specific questions. When in doubt, post the output of "/ip address print detail", "/ip route print detail", "/interface print detail", "/ip firewall export", and an accurate network diagram.
 
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Chupaka
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Re: Not equal cpu usage on 5.7

Wed Oct 05, 2011 1:03 am

/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
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