Date: Thu, 10 Apr 2014 14:38:35 +0200 From: =?ISO-8859-1?Q?Ermal_Lu=E7i?= <eri@freebsd.org> To: Hartmut Brandt <hartmut.brandt@dlr.de> Cc: hackers@freebsd.org, stable@freebsd.org, Vladislav Prodan <universite@ukr.net>, "net@freebsd.org" <net@freebsd.org> Subject: Re: Re[2]: Some gruesome moments with performance of FreeBSD at over 20K interfaces Message-ID: <CAPBZQG3NwsJQ0JzT_MbXo%2Bp7dy77PhU0VGEk2RvAd_a%2BjK_Neg@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1404101316390.52873@KNOP-BEAGLE.kn.op.dlr.de> References: <1397077963.756961709.gspkmzvd@frv35.fwdcdn.com> <alpine.BSF.2.00.1404101200320.52873@KNOP-BEAGLE.kn.op.dlr.de> <1397127901.499782177.24smhe7a@frv35.fwdcdn.com> <alpine.BSF.2.00.1404101316390.52873@KNOP-BEAGLE.kn.op.dlr.de>
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Another note related to Q-in-Q. You would probably be better of creating standard vlans for the first vlan layer and use ng_vlan for the second++ part of the Q-in-Q on top of the first ones. This also give better usability and will speedup a bit your times. On Thu, Apr 10, 2014 at 1:22 PM, Hartmut Brandt <hartmut.brandt@dlr.de>wrote: > On Thu, 10 Apr 2014, Vladislav Prodan wrote: > > VP>> On Wed, 9 Apr 2014, Vladislav Prodan wrote: > VP>> > VP>> VP>b) Service bsnmpd started at 12K interfaces, but immediately > loaded CPU > VP>> VP>at 80-100% > VP>> > VP>> I could imagine that this is because of the statistics polling. bsnmp > VP>> implements 64-bit interface statistics but we have only 32-bit > statistics > VP>> in the kernel. So it polls the kernel statistics for each interface > on a > VP>> rate that ensures that 32-bit don't overflow. If the interfaces are > GBit > VP>> or, worse, 10GBit interfaces the polling rate is rather high (in the > order > VP>> of seconds). > VP>> > VP>> You should either make sure that the interfaces report sensible > bitrates > VP>> (I doubt that 20k interfaces could all be GBit interfaces) or force a > slower > VP>> polling interval by setting begemotIfForcePoll.0 to some large value. > VP>> > VP>> harti > VP>> > VP> > VP>Thanks for the tip. > VP> > VP>At least 10 interfaces to be 1Gb, and the rest no more than 50M. > VP>BegemotIfForcePoll parameter in this case a little help, you will be > forced to stand another value for Gigabit Interface begemotIfForcePoll ... > > Yeah. There is only one parameter. > > You are running -STABLE, right? On current the statistics are 64-bit > (I wonder whether the operation on these values is automatically atomic on > all our platforms, though). > > harti > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > -- Ermal
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