From owner-freebsd-questions Thu Aug 3 9:15:19 2000 Delivered-To: freebsd-questions@freebsd.org Received: from winconx.com (ns1.winconx.net [208.60.80.2]) by hub.freebsd.org (Postfix) with SMTP id 492EF37B6AD for ; Thu, 3 Aug 2000 09:15:04 -0700 (PDT) (envelope-from travis@winconx.com) Received: (qmail 59970 invoked from network); 3 Aug 2000 16:15:06 -0000 Received: from dhcp01.winconx.net (HELO travis) (208.60.80.32) by ns1.winconx.net with SMTP; 3 Aug 2000 16:15:06 -0000 Message-ID: <034b01bffd64$97343040$20503cd0@travis> From: "Travis Leuthauser" To: , Subject: 3Com 3C905b-TX Date: Thu, 3 Aug 2000 11:05:06 -0500 Organization: DDS Group of Companies MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I'm posting this to questions and hackers in the hopes that someone can help me. Here's my scenario: I have a news server running 4.1 Stable cvsup'd 2 days ago. Running 3.X I had no problems. Had to update to 4 because my 45 G Ultra66 IDE drives were being very stupid under 3.X. After the update, I noticed that the most I could get out of a binary download from the news server on my 100Mbit network was about 25k/s. After a few hours of looking over everything and testing an ftp from one of the clients (running an ftp server). I determined that it was just my news service performing slowly. I was able to ftp a 700M file that averaged 800k/s. Mysteriously my news service picked back up to its normal speed. When I checked the news server, this is the message that was displayed on my terminal: xl0: transmission error: 90 xl0: tx underrun, increasing start threshold to 180 bytes. Since then, it has popped up a few more times I think now the threshold is up to 420. I looked at the xl driver and found where it sets the initial value: sc->xl_tx_thresh = XL_MIN_FRAMELEN; What if I were to change it to say: sc->xl_tx_thresh = 540; What effect would that have on my system, good or bad? Is there an optimum value to set? Should I just change out the NIC or is there another card holding up the bus? If I wanted to know what the current value of the buffer is, is there a command that would show me? If I change the value, do I need to just recompile my kernel, or is there something else I need to do? I saw a few posts from 99 about the topic, but no decisive answer was given. I am going to list the specifics of all the hardware in the box as well as the major software/ports running on it. Any help is greatly appreciated. Thanks, Travis Leuthauser Network Administrator WinConX Online, Inc. Hardware Specs: Pentium !!! 500Mhz 512M RAM Gigabyte GA-6VXE+ w/ VIA Apollo Pro AGPSet AOpen PG128 AGP Video 3Com 3c905b-tx NIC (has two IP's: one for incoming news - one to feed news out to users) Adaptec 2940U2W 4 IBM 9G UW SCSI Drives Western Digital 45G (using Ultra66) IBM 45G (using Ultra66) Western Digital 27G AOpen 40x CDRom Software: named ssh1 qmail 1.03 w/ tcpserver big brother 1.4c dnews 5.4f5 for FreeBSD 4 dmesg output: Copyright (c) 1992-2000 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 4.1-STABLE #2: Tue Aug 1 16:29:24 CDT 2000 root@news.winconx.com:/usr/src/sys/compile/NEWS Timecounter "i8254" frequency 1193182 Hz Timecounter "TSC" frequency 501139586 Hz CPU: Pentium III/Pentium III Xeon/Celeron (501.14-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x673 Stepping = 3 Features=0x387f9ff real memory = 536805376 (524224K bytes) avail memory = 518823936 (506664K bytes) Preloaded elf kernel "kernel" at 0xc031e000. Pentium Pro MTRR support enabled md0: Malloc disk npx0: on motherboard npx0: INT 16 interface pcib0: on motherboard pci0: on pcib0 pcib2: at device 1.0 on pci0 pci1: on pcib2 pci1: at 0.0 isab0: at device 7.0 on pci0 isa0: on isab0 atapci0: port 0xe000-0xe00f at device 7.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 pci0: at 7.2 irq 11 xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xe800-0xe87f mem 0xe0801000-0xe080107f irq 10 at device 8.0 on pci0 xl0: Ethernet address: 00:50:04:22:cc:4f miibus0: on xl0 xlphy0: <3Com internal media interface> on miibus0 xlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto ahc0: port 0xec00-0xecff mem 0xe0800000-0xe0800fff irq 12 at device 9.0 on pci0 ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs pcib1: on motherboard pci2: on pcib1 fdc0: at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 atkbdc0: at port 0x60,0x64 on isa0 atkbd0: flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 vga0: at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 sc0: at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1 at port 0x2f8-0x2ff irq 3 on isa0 sio1: type 16550A ppc0: at port 0x378-0x37f irq 7 on isa0 ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode ppi0: on ppbus0 lpt0: on ppbus0 lpt0: Interrupt-driven port ad0: 42934MB [87233/16/63] at ata0-master using UDMA66 ad1: 43979MB [89355/16/63] at ata0-slave using UDMA66 ata1-master: DMA limitted to UDMA33, non-ATA66 compliant cable ad2: 25941MB [52707/16/63] at ata1-master using UDMA33 acd0: CDROM at ata1-slave using PIO4 Waiting 5 seconds for SCSI devices to settle Mounting root from ufs:/dev/da0s1a da1 at ahc0 bus 0 target 1 lun 0 da1: Fixed Direct Access SCSI-3 device da1: 40.000MB/s transfers (20.000MHz, offset 31, 16bit), Tagged Queueing Enabled da1: 8748MB (17916240 512 byte sectors: 255H 63S/T 1115C) da2 at ahc0 bus 0 target 2 lun 0 da2: Fixed Direct Access SCSI-3 device da2: 40.000MB/s transfers (20.000MHz, offset 31, 16bit), Tagged Queueing Enabled da2: 8748MB (17916240 512 byte sectors: 255H 63S/T 1115C) da4 at ahc0 bus 0 target 4 lun 0 da4: Fixed Direct Access SCSI-3 device da4: 40.000MB/s transfers (20.000MHz, offset 31, 16bit), Tagged Queueing Enabled da4: 8748MB (17916240 512 byte sectors: 255H 63S/T 1115C) da3 at ahc0 bus 0 target 3 lun 0 da3: Fixed Direct Access SCSI-3 device da3: 40.000MB/s transfers (20.000MHz, offset 31, 16bit), Tagged Queueing Enabled da3: 8748MB (17916240 512 byte sectors: 255H 63S/T 1115C) da0 at ahc0 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI-2 device da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled da0: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C) pid 1037 (dmulti), uid 8: exited on signal 11 (core dumped) xl0: transmission error: 90 xl0: tx underrun, increasing tx start threshold to 120 bytes xl0: transmission error: 90 xl0: tx underrun, increasing tx start threshold to 180 bytes xl0: transmission error: 90 xl0: tx underrun, increasing tx start threshold to 240 bytes xl0: transmission error: 90 xl0: tx underrun, increasing tx start threshold to 300 bytes xl0: transmission error: 90 xl0: tx underrun, increasing tx start threshold to 360 bytes xl0: transmission error: 90 xl0: tx underrun, increasing tx start threshold to 420 bytes To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message