Call for testers: Atheros AR8121(L1E)/AR8113/AR8114(L2E)
pyunyh at gmail.com
Thu Dec 11 18:05:49 PST 2008
On Wed, Dec 10, 2008 at 08:45:56PM -0500, Josh Carroll wrote:
> > ale0 at 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:
> 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"?
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