Date: Thu, 24 Nov 2011 14:30:46 -0600 From: Kris Bauer <kristoph.bauer@gmail.com> To: Raul <raul@turing.b2n.org> Cc: freebsd-stable@freebsd.org Subject: Re: TCP Reassembly Issues Message-ID: <CAPNZ-WrQdjFEErt6K1uEndSc082q8Q48VHvtbP=5cNXFw7H7Rg@mail.gmail.com> In-Reply-To: <4ECE9914.6020502@turing.b2n.org> References: <CAPNZ-Wq38=F3o2hYuYF_unBj3SZQ52XhVhdcwQ8PE_vU9xc2YA@mail.gmail.com> <CABLqceRyohFFYtdnW%2Bt%2B63kwk00cbkJVz3oXWqrR=xijkg14CA@mail.gmail.com> <4ECE9914.6020502@turing.b2n.org>
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On Thu, Nov 24, 2011 at 1:20 PM, Raul <raul@turing.b2n.org> wrote: > El 24/11/2011 17:07, kerbzo escribi=F3: > > > I 'm experiencing a similar issue but I don't know if mine could be >> considered normal behaviour: even if net.inet.tcp.reass.curesegments >> is set to 1680 and does not icrease, the output of vmstat -z shows a >> high tcpreass fail value that I don't remember in previous (8-STABLE) >> builds: >> > > I see both, 'net.inet.tcp.reass.cursegments' reaching default > 'net.inet.tcp.reass.maxsegments' after 38 minutes of uptime, apparently f= or > never going down despite the amount of traffic and vmstat -z also show > tcpreass failures. > > I also see sudden packet 'bursts' discarded by memory problems maybe > related: > [....] > %date && netstat -s -p tcp | grep mem > jueves, 24 de noviembre de 2011, 19:39:23 CET > 5115 discarded due to memory problems > %date && netstat -s -p tcp | grep mem > jueves, 24 de noviembre de 2011, 19:39:30 CET > 5268 discarded due to memory problems > [....] > > My settings: > [....] > %cat /etc/sysctl.conf | grep -v ^\# > debug.cpufreq.lowest=3D1000 > > %cat /boot/loader.conf | grep -v ^\# > vfs.zfs.prefetch_disable=3D0 > aio_load=3D"YES" > cc_cubic_load=3D"YES" > > %sysctl net.isr > net.isr.numthreads: 1 > net.isr.maxprot: 16 > net.isr.defaultqlimit: 256 > net.isr.maxqlimit: 10240 > net.isr.bindthreads: 0 > net.isr.maxthreads: 1 > net.isr.direct: 0 > net.isr.direct_force: 0 > net.isr.dispatch: direct > [....] > > cc cubic although loaded, not used in this 'pristine' reboot. > About firewalling, pf using altq. > > Pretty recent compile: > [....] > %sysctl -a | grep RC2 > kern.osrelease: 9.0-RC2 > kern.version: FreeBSD 9.0-RC2 #0: Thu Nov 24 00:39:07 CET 2011 > [....] > > Regards, > Ra=FAl. > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > I am seeing the same sorts of things in netstat & vmstat: # netstat -s -p tcp |grep mem 742935 discarded due to memory problems # vmstat -z |grep tcpreass tcpreass: 40, 16464, 16340, 124, 131485,955443, 0 I also this filling up of reass.cursegments occur within an hour of reboot. Thanks, Kris
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