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/ ? -- --------------------------------------- Marek Cervenka =======================================
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 ?ervenka 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/ ? > > >-- --------------------------------------- Marek Cervenka =======================================
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 ?ervenka napsal(a):> 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 ?ervenka 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/ ? >> >> >> > >-- --------------------------------------- Marek Cervenka =======================================