Bad Performance CentOS6 ->CentOS7

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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/ ?

2 thoughts on - Bad Performance CentOS6 ->CentOS7

  • found interesting difference

    CentOS6 have increasing “Function call interrupts” only on cpu4 (its 2x quad core system with HT cpu0-cpu15)
    RES: 6286605 2569745 1885919 1842514 2177536 2138628
    1761718 1838163 3668947 2597374 1849095 1679889
    2736591 2523227 1751432 1611744 Rescheduling interrupts
    CAL: 248 362 366 362 40923894
    349 357 361 345 305 364 367
    363 337 356 352 Function call interrupts

    CentOS7 have “Function call interrupts” distributed to all cpus RES: 18659 22826 17808 14357 42245 36973
    29927 24703 15279 9098 7984 6564 27054
    23757 19585 16525 Rescheduling interrupts
    CAL: 304288 30969 30869 30555 39649 34481
    32515 28972 11286 22461 22623 22792 25012
    24027 22610 21718 Function call interrupts

    any ideas?

    Dne 9.11.2015 v 13:28 Marek Červenka napsal(a):

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    Marek Cervenka
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