Date: Fri, 12 Dec 2008 11:05:39 +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: <20081212020539.GI46707@cdnetworks.co.kr> In-Reply-To: <8cb6106e0812101745l54b23a08k7fbeddeb605f88ea@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> <8cb6106e0812101745l54b23a08k7fbeddeb605f88ea@mail.gmail.com>
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On Wed, Dec 10, 2008 at 08:45:56PM -0500, Josh Carroll wrote: > > 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? > Would you show me the output of "sysctl dev.ale.0.stats"? -- Regards, Pyun YongHyeon
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