From mboxrd@z Thu Jan 1 00:00:00 1970 Reply-To: From: "Allen Curtis" To: "Conn Clark" Cc: "May Ling List" Subject: RE: Poor 8260 FCC Ethernet performance Date: Fri, 31 May 2002 20:09:49 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" In-Reply-To: <3CF79C16.4B547602@esteem.com> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: > Could it be an analog problem? Have you looked at the signals > comming in on > a scope? > Looking at the signal with a scope is probably a good idea. Here is an update from today's fun. 1. These is an error in the fcc_enet.c file which causes NO and CRC errors when running in full-duplex mode. fcc_restart() should be updated to include FCC_PSMR_LPB when configuring full-duplex mode. (cleared when not) 2. Some relative performance measurements (HHL 2.4.2 vs. 2.4.19pre9) 10T Hub | 100BT switch -------------------------------------| 2.4.2 | 410KBps | 750KBps | -------------------------------------| 2.4.19 | 440KBps | 190KBps | -------------------------------------- RedHat 2.4.18-3 (x86) 3900KBps 3. TOP shows as much as 48% system utilization during a single FTP transfer. With the fix mentioned in #1, there are 0 errors reported by ifconfig. I may be missing something but I believe that these numbers are going the wrong way. There is still the question of performance decrease when using a 100BT switch. Signal intregety can not be the only suspect considering the performance did increase using an older version of the kernel. (although nothing like the Workstation performance) ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/