Re: [Server-devel] Is a USB-Ethernet NIC appropriate for the XS?
So Tony suggested just using the usb-ethernet thingies for the internet-connection. USB1.1 is, what, 700kbps? What are the chances that we can supply the schools with more bandwidth than that? /Ties On Tue, Mar 24, 2009 at 9:56 AM, Martin Langhoff martin.langh...@gmail.com wrote: On Tue, Mar 24, 2009 at 4:49 AM, Bryan Berry br...@olenepal.org wrote: The ever helpful cjb and Mitch_Bradley directed me to the root of the problem, the USB-ethernet devices I am using are USB 1.1 which has horrible throughput. A USB-ethernet device that supports USB 2.0 should fix the problem. That's great news! I'll also be delighted to hear about what hw you find that works... cheers, m -- martin.langh...@gmail.com mar...@laptop.org -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Is a USB-Ethernet NIC appropriate for the XS?
That isn't the problem. I believe that USB 1.1 NIC's choke when they have multiple connections. I guess the Rx polling - whatever that is - causes so many interrupts that the NIC stops serving requests friends on server-devel, I highly recommend you use the lsusb -v to find out if your usb NIC is actually USB 2.0. Apparently a number of USB NIC's on the market are advertised as USB 2.0 but are actually 1.1 On Tue, 2009-03-24 at 14:08 +0545, Ties Stuij wrote: So Tony suggested just using the usb-ethernet thingies for the internet-connection. USB1.1 is, what, 700kbps? What are the chances that we can supply the schools with more bandwidth than that? /Ties On Tue, Mar 24, 2009 at 9:56 AM, Martin Langhoff martin.langh...@gmail.com wrote: On Tue, Mar 24, 2009 at 4:49 AM, Bryan Berry br...@olenepal.org wrote: The ever helpful cjb and Mitch_Bradley directed me to the root of the problem, the USB-ethernet devices I am using are USB 1.1 which has horrible throughput. A USB-ethernet device that supports USB 2.0 should fix the problem. That's great news! I'll also be delighted to hear about what hw you find that works... cheers, m -- martin.langh...@gmail.com mar...@laptop.org -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel -- Bryan W. Berry Technology Director OLE Nepal, http://www.olenepal.org ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Is a USB-Ethernet NIC appropriate for the XS?
The ever helpful cjb and Mitch_Bradley directed me to the root of the problem, the USB-ethernet devices I am using are USB 1.1 which has horrible throughput. A USB-ethernet device that supports USB 2.0 should fix the problem. BryanWB Mitch_Bradley: great, do u think I can buy a usb2 ethernet nic for under $50? budget is tight and I need these for 15 XS's Mitch_Bradley AX8817X and AX88772 are the chips BryanWB Mitch_Bradley: thanks Mitch_Bradley http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=589 BryanWB Mitch_Bradley: is there any reason that USB-Ethernet is inherently unworkable or is it just a question of getting the right usb-ethernet nic? Mitch_Bradley USB 1.1 sucks rocks for ethernet because the polling for rx packets kills the throughput cjb BryanWB: no, the others are usb2 cjb what Mitch_Bradley said BryanWB Mitch_Bradley: so usb1.1 will totally crap out w/ 20 users ? Mitch_Bradley USB2.0 has much improved bandwidth and much lower latency for polling usb1.1 will totally crap out with 1 user BryanWB Mitch_Bradley: thanks a lot guys, you are saving my bacon cjb BryanWB: the number of users won't affect it, other than by sucking proportional to load Mitch_Bradley I didn't even bother supporting USB 1.1 ethernet chips in OFW. It's just not worth it. cjb anyway, yeah. just find an asix dongle. Mitch_Bradley try to buy a name brand device. The no-name ones often just don't work. On Mon, 2009-03-23 at 15:43 +0100, Martin Langhoff wrote: On Mon, Mar 23, 2009 at 3:10 PM, Bryan Berry br...@olenepal.org wrote: We want to use the MSI Wind PC for the XS but it has one big problem. It only has 1 on-board NIC and no PCI slots. As you know, the XS requires 2 NIC's. We have tried several different USB NIC's and are having serious throughput problems. Is this issue one w/ the NIC or the fact that it is connected by USB? My main worry with USB-connected NICs would be reliability. If the NIC is reliable, but the throughput a bit below-par, you can still probably use it as the WAN NIC -- the throughput is likely to be constrained upstream anyway. - When you say throughput problems... what are you getting? How bad is it? Even if limited, would it be appropriate for the WAN port? - The problem may be specific to the driver or NIC hardware -- is there any discussion on the kernel dev list about it? - The problem may be with the USB bus on the MS Wind, hardware or drivers. Perhaps testing for bus throughput or interrupt handling helps? - Have you tested the reliability of the devices? This may be a larger problem. cheers, martin -- Bryan W. Berry Technology Director OLE Nepal, http://www.olenepal.org ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Is a USB-Ethernet NIC appropriate for the XS?
On Tue, Mar 24, 2009 at 4:49 AM, Bryan Berry br...@olenepal.org wrote: The ever helpful cjb and Mitch_Bradley directed me to the root of the problem, the USB-ethernet devices I am using are USB 1.1 which has horrible throughput. A USB-ethernet device that supports USB 2.0 should fix the problem. That's great news! I'll also be delighted to hear about what hw you find that works... cheers, m -- martin.langh...@gmail.com mar...@laptop.org -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
