Hi Adisorn, You should probably try monitoring your network with Ethereal or something similar to see what the problem really is - in other words make sure that the problem really is packets coming out of your board too slowly.
Mark Chambers ----- Original Message ----- From: "Adisorn Ermongkonchai" <[EMAIL PROTECTED]> To: <acurtis at onz.com> Cc: <linuxppc-embedded at lists.linuxppc.org> Sent: Sunday, June 06, 2004 2:00 PM Subject: Poor 8260 FCC Ethernet performance > > Hi Allen and Linuxppc-embedded guru, > > Referring to your 31 May 2002 post to LinuxPPC about > poor 8260 FCC Ether performance. Did you figure > out why is the FCC so slow? We have encountered this > problem as well. We use the newer MPC8270 with 400MHz > clock and 200MHz CPM speed with BCM5222 PHY. It > ended up running at only ~5Mbps on 100Mbps Ethernet > line. We just tried 1 FCC. > > Does anyone on this post see the same problem? We use > linux 2.4.18 with PPC pqii driver (somehow the other > driver didn't seem to work for all 3 FCC's) We > also tried on Motorola 8260 eval board and the result > is the same. We also tried MEN Micro F6, it gave > better result from 11MBps to 30Mbps. We also tried > just uboot to eliminate Linux out of the picture and > the result was about the same. > > I was about to give up on this MPC8270 then I saw this > post so I thought I try. I cannot believe that > Motorola would make a chip that support 3 FCC's > but can only run at this ridiculous speed. I am > software engineer, this could be hardware. > > Can anyone help me on this? I'm about to have to > change the processor to PowerPC 4xx. > > Thanks in advance. > > Regards, > Adisorn Ermongkonchai > > > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
