On 08/04/2010 13:07, Barney Cordoba wrote: > > --- On Fri, 4/2/10, K. Macy <km...@freebsd.org> wrote: > > >> From: K. Macy <km...@freebsd.org> >> Subject: Re: kern/144917: Flowtable crashes system >> To: "Ilya Zhuravlev" <i...@el-crane.net> >> Cc: freebsd-net@freebsd.org, "Evgenii Davidov" <d...@korolev-net.ru> >> Date: Friday, April 2, 2010, 11:07 PM >> Please try with the latest 8-STABLE >> and tell me if recent changes fix it. >> >> Thanks, >> Kip >> >> On Thu, Mar 25, 2010 at 8:32 AM, Ilya Zhuravlev <i...@el-crane.net> >> wrote: >> >>> On 21.03.2010 17:04, Evgenii Davidov wrote: >>> >>>> Здравствуйте, >>>> >>>> On Sat, Mar 20, 2010 at 11:06:35PM +0000, Doychin >>>> >> Dokov пишет: >> >>>> >>>>>> Description: >>>>>> >>>>> It seems like flowtable has been merged and >>>>> >> enabled by default in 8.0.... >> >>>>> which is a really really bad idea. >>>>> On a system which handles two full BGP tables >>>>> >> it makes one of the CPU >> >>>>> cores run at 100% right after most of the >>>>> >> prefixes get installed in the >> >>>>> routing table. >>>>> >>>> i saw the same effect with ospf >>>> >>>> >>> 8.0-p2, 2 full-view with openbgpd >>> "tuning": >>> net.inet.tcp.blackhole=2 >>> net.inet.udp.blackhole=1 >>> net.inet.icmp.icmplim_output=0 >>> net.inet.icmp.drop_redirect=1 >>> net.inet.flowtable.nmbflows=32768 >>> >>> 1 week uptime.Now I think only about increasing tx/rx >>> >> descriptors to reduce >> >>> interrupts (default values was not changed) >>> >>> >>> netstat -w1 -Iigb0 >>> input (igb0) >>> >> output >> >>> packets errs bytes packets errs >>> >> bytes colls >> >>> 49100 0 12290513 23693 0 >>> >> 27268884 0 >> >>> 48322 0 12688283 24332 0 >>> >> 28099404 0 >> >>> 50602 0 12759620 24437 0 >>> >> 27698341 0 >> >>> 47857 0 11354124 21410 0 >>> >> 23845155 0 >> >>> netstat -w1 -Iigb1 >>> input (igb1) >>> >> output >> >>> packets errs bytes packets errs >>> >> bytes colls >> >>> 32428 0 35027019 24562 0 >>> >> 5624934 0 >> >>> 30621 0 33384339 23569 0 >>> >> 4456944 0 >> >>> 28419 0 31014269 21571 0 >>> >> 3638083 0 >> >>> 29409 0 32524760 22137 0 >>> >> 3503600 0 >> >>> 30965 0 33532742 23973 0 >>> >> 5089231 0 >> >>> netstat -w1 -Iem0 >>> input (em0) >>> >> output >> >>> packets errs bytes packets errs >>> >> bytes colls >> >>> 17217 0 3929366 72741 0 >>> >> 46377762 0 >> >>> 17412 0 3745112 75522 0 >>> >> 49338883 0 >> >>> 18385 0 4014568 77444 0 >>> >> 50532101 0 >> >>> 17142 0 3875518 77125 0 >>> >> 47646681 0 >> >>> 16870 0 3528316 73188 0 >>> >> 47940959 0 >> >>> 17069 0 3682891 80268 0 >>> >> 52904747 0 >> >>> 17313 0 4101576 75586 0 >>> >> 51933330 0 >> >>> _______________________________________________ >>> freebsd-net@freebsd.org >>> > > How about telling us how to turn it off; or better yet how to not > compile it into the kernel at all. Thats the best solution. > > As my Dad used to say on a regular basis, we need this like we > need a hole in our head. Is 8.0 the Kip Macy personal test bed? > > Why is something that virtually no-one needs enabled by default? > > Barney > > I havent followed the whole thread so if this doesnt actally work for some reason then sorry for noise.
[r...@prawn ~]# sysctl -a | grep flowtable net.inet.ip.output_flowtable_size: 2048 net.inet.flowtable.nmbflows: 4096 net.inet.flowtable.tcp_expire: 86400 net.inet.flowtable.fin_wait_expire: 600 net.inet.flowtable.udp_expire: 300 net.inet.flowtable.syn_expire: 300 net.inet.flowtable.collisions: 0 net.inet.flowtable.max_depth: 0 net.inet.flowtable.free_checks: 8845 net.inet.flowtable.frees: 2181 net.inet.flowtable.misses: 2403 net.inet.flowtable.lookups: 11633 net.inet.flowtable.hits: 9231 net.inet.flowtable.enable: 1 net.inet.flowtable.debug: 0 [r...@prawn ~]# sysctl -d net.inet.flowtable.enable net.inet.flowtable.enable: enable flowtable caching. [r...@prawn ~]# sysctl net.inet.flowtable.enable=0 net.inet.flowtable.enable: 1 -> 0 Vince > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" > _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
