Date: Fri, 10 Nov 2000 19:44:26 +0100 From: Thierry Herbelot <herbelot@cybercable.fr> Cc: freebsd-net@FreeBSD.ORG Subject: Re: 16 NICs on a Compaq PC ? Message-ID: <3A0C420A.F9446B74@cybercable.fr> References: <C1256993.002E6234.00@frmta003.netfr.alcatel.fr>
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for reference only : the problem came from using 4 4-port boards in a single machine (seems that the 4th PCI slot does not like the DFE-570TX) I have a good performance with just 3 NICs for a total of 12 Ethernet ports per machine. TfH Thierry.Herbelot@alcatel.fr wrote: > > Hello, > > I'm trying to build a low-cost Ethernet router with a Compaq Deskpro > EP-6450 and 4 4-port NIC from DLINK (DFE-570-TX model) > > I'm using the dc driver for a 4.1.1-Release. > > the performance is very disappointing (the throughput is on the order of > 200 kpbs for a direct 100Mbps ful-duplex Ethernet link) > > I've got messages "dc0 : TX underrun -- increasing TX threshold" (lots of them ..) > > I've also seen that all dc ports get mapped to the same irq (nr 11), and when > I try to change this setting, the machine stops booting (I have to try with WinNT) > > 1st Q : is there a performance hit with all ports tied to the single irq11 ? (my gut feeling > would be "of course", I'd like to be sure) > 2nd Q : has someone built a similar configuration ? > 3rd Q : do I need to dump all the Compaqs to buy other, more standard machines ? > > TfH > PS1 : > PS2 : sinppet of the dmesg : > .... > dc0: <Intel 21143 10/100BaseTX> port 0x4000-0x407f mem 0x40c00000-0x40c003ff irq > 11 at device 4.0 on pci2 > dc0: Ethernet address: 00:80:c8:f8:4c:4d > miibus0: <MII bus> on dc0 > ukphy0: <Generic IEEE 802.3u media interface> on miibus0 > ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto > dc1: <Intel 21143 10/100BaseTX> port00x4080-0x40ff mem 0x40d00000-0x40d003ff irq > 11 at device 5.0 on pci2 > dc1: Ethernet address: 00:80:c8:f8:4c:4e > mii\M-bus1: <MII bus> on dc1 > ukphy1: <Generic IEEE 802.3u media interface> on miibus1 > ukphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto > dc2: <Intel 21143 10/100BaseTX> port 0x4400-0x447f mem 0x40e00000-0x40e003ff irq > 11 at device 6.0 on pci2 > dc2: Ethernet address: 00:80:c8:f8:4c:4f > miibus2: <MII bus> on dc2 > ukphy2: <Generic IEEE 802.3u media interface> on miibus2 > ukphy2: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto > dc3: <Intel 21143 10/100BaseTX> port 0x4480-0x44ff mem 0x40f00000-0x40f003ff irq > .... -- Thierry Herbelot To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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