Date: Thu, 4 Apr 2013 06:39:10 -0700 (PDT) From: Barney Cordoba <barney_cordoba@yahoo.com> To: Nick Rogers <ncrogers@gmail.com>, Adrian Chadd <adrian@freebsd.org> Cc: Karim Fodil-Lemelin <fodillemlinkarim@gmail.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: igb and ALTQ in 9.1-rc3 Message-ID: <1365082750.44226.YahooMailClassic@web121606.mail.ne1.yahoo.com> In-Reply-To: <CAJ-VmokAMn_gHqEWbywWEkqa0MZrjgEZCbrx1yn0b=X9A84CzQ@mail.gmail.com>
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--- On Tue, 4/2/13, Adrian Chadd <adrian@freebsd.org> wrote: > From: Adrian Chadd <adrian@freebsd.org> > Subject: Re: igb and ALTQ in 9.1-rc3 > To: "Nick Rogers" <ncrogers@gmail.com> > Cc: "Karim Fodil-Lemelin" <fodillemlinkarim@gmail.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> > Date: Tuesday, April 2, 2013, 6:39 PM > Yes: > > * you need to add it to conf/options - see if there's an > opt_igb.h to > add it to, otherwise you'll need to add one; > * Make sure the driver code includes opt_igb.h; > * Then make sure you make kernel modules using either make > buildkernel > KERNCONF=X, or you set the environment appropriately so the > build > scripts can find your kernel build directory (where it > populates all > the opt_xxx.h includes) and it'll have this module set. > > Hopefully Jack will do this. > > Yes, we need a better queue management discipline API in the > kernel. > Jacks' just falling afoul of the fact we don't have one. > It's not his > fault. That's not true at all. For a bridged system running a firewall or doing filtering, virtually all of the proper design can be done in the ethernet driver. Or course if you have 2 different drivers then you need a different scheme, but if the input and the output is the same driver you can manage virtually all of the contention. You can't just randomly do things; you have to design to minimize lock contention. Drivers that seem to work fine at low volume blow up quickly as contention increases. BC
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