Date: Fri, 12 Dec 2008 12:56:25 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: Josh Carroll <josh.carroll@gmail.com> Cc: Steve Franks <bahamasfranks@gmail.com>, current-list freebsd <freebsd-current@freebsd.org> Subject: Re: Call for testers: Atheros AR8121(L1E)/AR8113/AR8114(L2E) ethernet Message-ID: <20081212035625.GN46707@cdnetworks.co.kr> In-Reply-To: <8cb6106e0812111951k18f4663ck2121b550dfe57322@mail.gmail.com> References: <20081203090658.GJ9639@cdnetworks.co.kr> <37502393@bb.ipt.ru> <20081206023016.GF22093@cdnetworks.co.kr> <539c60b90812081127s4ffb509fnea9d44d4298da666@mail.gmail.com> <8cb6106e0812081252j2b0c8e78g4dcecf8d3770c269@mail.gmail.com> <8cb6106e0812101745l54b23a08k7fbeddeb605f88ea@mail.gmail.com> <20081212020539.GI46707@cdnetworks.co.kr> <8cb6106e0812111923l15f1f715g6f20f5925e1d471a@mail.gmail.com> <20081212034042.GL46707@cdnetworks.co.kr> <8cb6106e0812111951k18f4663ck2121b550dfe57322@mail.gmail.com>
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On Thu, Dec 11, 2008 at 10:51:23PM -0500, Josh Carroll wrote: > > I guess it's caused by flow-control frames. > > The flow-control feature is disabled in most drivers as mii(4) > > layer still lacks the feture. ale(4) has flow-control support code > > but it is in disabled state. When mii(4) is ready to handle > > flow-controls ale(4) may work better. > > em(4) does not rely on mii(4) layer so it implemented flow-controls > > in driver. You can check flow-control satus of em(4) with > > "sysctl dev.em.0.stats=1"(See XON/XOFF). > > Hmm, any idea why my previous motherboard (P5K-E) which had an msk(4) > worked ok without the stuttering for this streaming? I believe it > relies on mii as well, right? > Yes, but msk(4) had hacks in e100phy(4) to enable flow-controls. I don't want to add these hacks to all other drivers in tree. > Thanks, I guess I'll stick with the em(4) PCI card, at least until I > can get a PCI-E em(4). :) > > Josh -- Regards, Pyun YongHyeon
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