Date: Wed, 10 Dec 2008 20:45:56 -0500 From: "Josh Carroll" <josh.carroll@gmail.com> To: "Steve Franks" <bahamasfranks@gmail.com> Cc: pyunyh@gmail.com, current-list freebsd <freebsd-current@freebsd.org> Subject: Re: Call for testers: Atheros AR8121(L1E)/AR8113/AR8114(L2E) ethernet Message-ID: <8cb6106e0812101745l54b23a08k7fbeddeb605f88ea@mail.gmail.com> In-Reply-To: <8cb6106e0812081252j2b0c8e78g4dcecf8d3770c269@mail.gmail.com> References: <490F47BE.9080205@janh.de> <20081104015235.GC98154@cdnetworks.co.kr> <4910C055.8000505@janh.de> <20081105013558.GA99795@cdnetworks.co.kr> <20081203090658.GJ9639@cdnetworks.co.kr> <37502393@bb.ipt.ru> <20081206023016.GF22093@cdnetworks.co.kr> <539c60b90812081127s4ffb509fnea9d44d4298da666@mail.gmail.com> <8cb6106e0812081252j2b0c8e78g4dcecf8d3770c269@mail.gmail.com>
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> ale0@pci0:2:0:0: class=0x020000 card=0x82261043 chip=0x10261969 > rev=0xb0 hdr=0x00 > vendor = 'Attansic (Now owned by Atheros)' > class = network > subclass = ethernet > > iperf (ale0 as -s): [ 3] 0.0-10.0 sec 1.10 GBytes 941 Mbits/sec > iperf (ale0 as -c): [ 3] 0.0-10.0 sec 1.08 GBytes 931 Mbits/sec > > So all seems well here. Well, I spoke too soon. Overall gigE throughput wise and day to day activities (NAT'd 20 Mbit FiOS) were fine. Tonight, however, I went to watch a 720p video (~4 Mbps bitrate or less) on my Popcorn Hour over NFS which has worked fine in the past. It was extremely "jerky" and unwatchable. Figuring perhaps the Popcorn Hour had an issue, I fired up an NFS server on another box and the video streamed just fine. I then rebooted this box and threw in a trusty old PCI em(4) card, and all is well. I tried playing with these two sysctl knobs for ale0: dev.ale.0.int_rx_mod and dev.ale.0.int_tx_mod I tried setting both to 0 and both to higher numbers on the documented scale (10000 I believe), neither of which helped. I imagine since what I want here is a "smoother" transmission, setting int_tx_mod to 0 is what would have the most effect, but the video still was not playable with it set to 0. I've since disabled the ale0 interface in the BIOS and I'm using the em(4) for now. Is there another knob for ale I should try adjusting? Thanks, Josh
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