Date: Mon, 05 Oct 2009 11:54:50 -0700 From: Julian Elischer <julian@elischer.org> To: rihad <rihad@mail.ru> Cc: Eugene Grosbein <eugen@kuzbass.ru>, Luigi Rizzo <rizzo@iet.unipi.it>, freebsd-net@freebsd.org Subject: Re: dummynet dropping too many packets Message-ID: <4ACA40FA.7010207@elischer.org> In-Reply-To: <4ACA34F3.60901@mail.ru> References: <4AC8A76B.3050502@mail.ru> <20091005025521.GA52702@svzserv.kemerovo.su> <20091005061025.GB55845@onelab2.iet.unipi.it> <4AC9B400.9020400@mail.ru> <20091005090102.GA70430@svzserv.kemerovo.su> <4AC9BC5A.50902@mail.ru> <20091005095600.GA73335@svzserv.kemerovo.su> <20091005100446.GA60244@onelab2.iet.unipi.it> <4ACA26D4.2080102@elischer.org> <4ACA2BA6.40709@mail.ru> <4ACA335C.2060806@elischer.org> <4ACA34F3.60901@mail.ru>
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rihad wrote: > Julian Elischer wrote: >> rihad wrote: >>> Julian Elischer wrote: >>>> Luigi Rizzo wrote: >>>> >>>> Is it possible to know what sessions are losing packets? >>>> >>> Yes, of course, by running ipfw pipe show ;-) >>> There's one confusing thing, though: net.inet.ip.dummynet.io_pkt_drop >>> isn't increasing while around 800-1000 packets per second are being >>> dropped right now. And so "ipfw pipe show" Drp column wouldn't grow >>> either. So it's either not dummynet dropping packets, or a bug (?). >> >> >> I suspect your interface queues. >> > > You mean in hardware? Any way to tweak those? no, there is (usually) a software queue before the hardware queue. look at /sys/net/if_ethersubr.c
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