Re: Network Performace
> That's certainly a step in the right direction :) > > > But something is still very > > wrong performance wise. It has helped, but I still can't push in/out > > nearly 100Mb/sec. (100Mb in, 100Mb out I mean). A simple FTP transfer > > locally through the routers gigabit interface causes our internet > > performance to plummet. I've disabled all the onboard stuff that was > > sharing IRQs with PCI cards, but I didn't figure that was an issue, > > didn't make a difference either way. Would the fact the gigabit is on the > > same PCI bus have any bearing? I would expect to at least get 100BT > > performance even so, but I don't have any experience with gigabit > > ethernet... > > The only thing I can suggest is try different PCI slots, or Gigabit cards, > or, worst case a different system. Having NIC's on separate PCI busses (as > opposed to both on the same PCI bus) may help it [But that's probably going > to need a new board etc.] Thats what I was going to try next, but i've noticed this : gw# netstat -I xl0 -w 1 input (xl0) output packets errs bytespackets errs bytes colls 7120119118416 5566 02507132 0 6754 68498898 5649 03009719 0 7104 98856812 5802 03004529 0 7737199787501 6429 02994557 0 7551169670490 5948 02761794 0 I would guess such a large number of errors per second could be causing the interrupt usuage? From what i've been able to find such input errors are usually caused by a bad cable, or switch... > You don't say what Gigabit nic's your using? - I've had a lot of varied > results with different nic's, with surprisingly cheap 10/100/1000Mbit cards > giving 'reasonable' performance - but get left standing for dust by other > more expensive cards. Its an Intel Fiber card, don't know the exact model offhand... > The only other thing I can think of is, check the duplex/media options are > all setup properly on the cards / switches etc. - or try forcing things to > fdx etc. Been there, done that, full duplex/autoselect makes no difference, but its currently set for full/1000SX on both ends. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Network Performace
--On 24 June 2003 17:01 -0700 Shawn Ramsey <[EMAIL PROTECTED]> wrote: Try looking into FreeBSD's "polling" mode - i.e. interrupt free Network cards. If your shifting a lot of small packets (such as online gaming stuff etc.) - you may find your milage pretty limited using standard PC kit - as the x86 architecture wasn't really designed for shifting lots of small packets around [as I've seen many a time in the past :(] This router is routing 99% NNTP traffic, so I wouldn't think small packet size would be it. I tried polling, and its greatly increased the amount of "idle CPU", and Interupt is around 20% now... That's certainly a step in the right direction :) But something is still very wrong performance wise. It has helped, but I still can't push in/out nearly 100Mb/sec. (100Mb in, 100Mb out I mean). A simple FTP transfer locally through the routers gigabit interface causes our internet performance to plummet. I've disabled all the onboard stuff that was sharing IRQs with PCI cards, but I didn't figure that was an issue, didn't make a difference either way. Would the fact the gigabit is on the same PCI bus have any bearing? I would expect to at least get 100BT performance even so, but I don't have any experience with gigabit ethernet... The only thing I can suggest is try different PCI slots, or Gigabit cards, or, worst case a different system. Having NIC's on separate PCI busses (as opposed to both on the same PCI bus) may help it [But that's probably going to need a new board etc.] You don't say what Gigabit nic's your using? - I've had a lot of varied results with different nic's, with surprisingly cheap 10/100/1000Mbit cards giving 'reasonable' performance - but get left standing for dust by other more expensive cards. The only other thing I can think of is, check the duplex/media options are all setup properly on the cards / switches etc. - or try forcing things to fdx etc. -Kp ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Network Performace
> > with unused USB and onboard NIC which is also not used. Should I be able > > to push more than 100Mb sec with such a system? It is not doing anything > > else, no NAT, one IPFW rule. OS is FreeBSD 4.7-RELEASE. > > All depends how big the packets are etc. - 90% interrupt time is fairly > typical of x86/PC kit shoveling lots of small packets. > > Try looking into FreeBSD's "polling" mode - i.e. interrupt free Network > cards. If your shifting a lot of small packets (such as online gaming stuff > etc.) - you may find your milage pretty limited using standard PC kit - as > the x86 architecture wasn't really designed for shifting lots of small > packets around [as I've seen many a time in the past :(] This router is routing 99% NNTP traffic, so I wouldn't think small packet size would be it. I tried polling, and its greatly increased the amount of "idle CPU", and Interupt is around 20% now... But something is still very wrong performance wise. It has helped, but I still can't push in/out nearly 100Mb/sec. (100Mb in, 100Mb out I mean). A simple FTP transfer locally through the routers gigabit interface causes our internet performance to plummet. I've disabled all the onboard stuff that was sharing IRQs with PCI cards, but I didn't figure that was an issue, didn't make a difference either way. Would the fact the gigabit is on the same PCI bus have any bearing? I would expect to at least get 100BT performance even so, but I don't have any experience with gigabit ethernet... ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Network Performace
--On 23 June 2003 18:12 -0700 Shawn Ramsey <[EMAIL PROTECTED]> wrote: I am having some issues with network performance and am wondering if anyone has any suggestions... the box in question has 2 100BT interfaces, and an Intel (em driver) fiber Gigabit. The Gigabit connects to a switch, and the two fast-e are WAN connections to our ISP(s). This box seems to be using an awful lot of CPU cycles relative to the traffic it is pushing, which is around 65-70Mb inbound, and 20-30 Mb/outbound(on average), which seems to be about its limit. This is an Athlon XP 1500 box, 256MB RAM, top shows 90+% interrupt usage, CPU usually has about 5-10% idle. Gigabit is on a 32-bit bus, and Gigabit is on an IRQ shared with unused USB and onboard NIC which is also not used. Should I be able to push more than 100Mb sec with such a system? It is not doing anything else, no NAT, one IPFW rule. OS is FreeBSD 4.7-RELEASE. All depends how big the packets are etc. - 90% interrupt time is fairly typical of x86/PC kit shoveling lots of small packets. Try looking into FreeBSD's "polling" mode - i.e. interrupt free Network cards. If your shifting a lot of small packets (such as online gaming stuff etc.) - you may find your milage pretty limited using standard PC kit - as the x86 architecture wasn't really designed for shifting lots of small packets around [as I've seen many a time in the past :(] -Kp ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
