Date: Sat, 18 Dec 1999 17:02:40 +0100 (CET) From: "O. Hartmann" <ohartman@ipamzlx.physik.uni-mainz.de> To: freebsd-smp@freebsd.org Subject: parallelport problems, ALi 1542 chipset Message-ID: <Pine.BSF.4.10.9912181701520.26527-100000@ipamzlx.physik.uni-mainz.de>
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Dear Sirs. I posted a question before in one of the related newsgroup for this problem but it seems that nobody wants to give an answer or nobody has an answer. I'll try it here again and hope it will have success. I have a printserver, based on FreeBSD 3.4. Hardware is: Gigabyte 5GAA main PCB, based on ALi Chipset 1542-100 (Aladdin-V AGPset Chip) CPU AMD K6-2 500MHz memory 128MBytes PC100 RAM NIC 3COM 3C905B-TX (at 100MB/full duplex) Adaptec 2940U Controller Matrox G200 graphics device noname 8 bit additional parallel port card on ISA bus, EPP capabilities. Phenomenon: this system is our printserver, operating with two laser printers. When printing via lpt0 (built in port) I recognize no performance losses of the system, but whenever someone prints out via lpt1, the additional parallel port interface, this system crashes in performance and for the time the spooler is copying data via lpt1 the server is not accessible via network. Working on console of this machine I realise nothing, but performance of diskdevice seems to be compromised. Accessing this machine via network is impossible! Whenever someone prints out, ping latency pushes up to >16, >25 ms (nomrally 0.200 - 0.500 on our LAN). I changed this additional parallelport card against an older type board (16 bit multi I/O adaptor) - and realized the same! Before I used a GigaByte board based on SiS chipset and I never realized those performance losses so it seems to be a problem of the internal driver of FreeBSD or generally a problem of the PCI-ISA bridge of ALi chips. Before posting my kernel configurations it would be nice whether you can give me hints and tips or discuss this problem. If you're sure it was related to the mainboard/chipset please report me! But ordering a new main PCB could run me into the same problems so I would like to be informed prior to avoid mistakes. Additional, I must say that I configured the additional port like this: controller ppbus0 controller ppbus1 controller ppc0 at isa? port "IO_LPT1" flags 0x08 tty irq 7 drq 1 controller ppc1 at isa? port "IO_LPT2" flags 0x04 tty irq 5 drq 3 device lpt0 at ppbus0 device lpt1 at ppbus1 Hope that is enough information to make any decissions ... Best wishes and thanks in advance, O. Hartmann Gruss O. Hartmann ------------------------------------------------------------------- ohartman@ipamzlx.physik.uni-mainz.de Klimadatenserver des IPA, Universitaet Mainz To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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