[asterisk-users] bad performance centos6 ->centos7

[Marek Červenka]

found this interesting article
http://stackoverflow.com/questions/12111954/context-switches-much-slower-in-new-linux-kernels

running with network-latency profile and its better now but still not 
good as centos6

[root at ast1 ~]# tuned-adm active
Current active profile: network-latency


Dne 6.11.2015 v 10:18 Marek Červenka napsal(a):
> hi,
>
> i'm evaluating performance of centos7
> i did tests on centos6 x86_64/distro kernel 2.6.32, asterisk 11.16.0 
> with 500calls (7sec alaw, simple dialplan, pass trough - sipp 
> generators/asterisk receiver with answer/playback)
> scenario - sipp generators - asterisk - asterisk receiver (i wrote 
> ansible scenario for this if you are interested)
>
> then i reinstalled system to
> centos7 x86_64/distro kernel 3.10, asterisk 11.20.0 and run the test 
> again
>
> there is big performance hit
> https://dl.dropboxusercontent.com/u/44105720/context_interrupts.PNG
> https://dl.dropboxusercontent.com/u/44105720/cpu.PNG
> https://dl.dropboxusercontent.com/u/44105720/load.PNG
>
> any ideas what tweaks can help?  (it looks like the main problem is in 
> interrupts from network card)
> your experience with centos7?
> any experience with kernel 4.2 from 
> http://elrepo.org/linux/kernel/el7/x86_64/RPMS/ ?
>
>
>


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Marek Cervenka
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