Re: Call for testers: Atheros AR8121(L1E)/AR8113/AR8114(L2E) ethernet

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:
 > 
 > 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