Date: Sat, 18 Aug 2012 23:23:17 +0400 From: Lev Serebryakov <lev@FreeBSD.org> To: Ian Lepore <freebsd@damnhippie.dyndns.org> Cc: current@freebsd.org Subject: Re: CURRENT as gateway on not-so-fast hardware: where is a bottlneck? Message-ID: <1116278226.20120818232317@serebryakov.spb.ru> In-Reply-To: <1345215393.27688.85.camel@revolution.hippie.lan> References: <157941699.20120815004542@serebryakov.spb.ru> <CAJ-Vmon86-FPs4%2BXXkQXAow1jW465pMM2Sj7ZHi_0_E9VYSFSA@mail.gmail.com> <502AE8B5.9090106@FreeBSD.org> <502B775D.7000101@FreeBSD.org> <1849591745.20120815144006@serebryakov.spb.ru> <1345139226.27688.48.camel@revolution.hippie.lan> <174138639.20120817143840@serebryakov.spb.ru> <1345215393.27688.85.camel@revolution.hippie.lan>
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Hello, Ian. You wrote 17 =C1=D7=C7=D5=D3=D4=C1 2012 =C7., 18:56:33: IL> That result actually matches my expectation... it fixed only a part of IL> your problem. I was (partly) wrong :( Under ``really high'' load (4MiB/s up/down load in same time) userland freezes again. Unfortunately, it is difficult to repeat such load on request in y case, so I don't have KTR of scheduling in such case, but here is one thing I notice: when load is lower (like 2MiB/s both ways) ng_queue consume only 4-5% of CPU. And before freeze "top" shows ng_queue consumes about 60% of CPU. It is strange, as traffic goes up only at x2 rate... --=20 // Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>
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