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/
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" <redacted>
To: <redacted>
Cc: <redacted>
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/
--- Mark Chambers <markc@mail.com> wrote:
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
It is the packet coming out from the board that is
slow. But we also found that receiving side is
even slower. What was the 8260 FCC performance that
you got? According to Dean's response, he could
forward at 29000 pps and that was much, much
better than ours.
Adisorn.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/