Check to make sure the links are all full-duplex. We started seeing bad performance with the em(4) driver on our HP Proliant 360DL G5's using 1000Mbits. It turned out that switch was setting it's port to half-duplex and the emX interface was following suit. HTH, Patrick joe wrote: > On 05/08/2010 01:31 PM, Jack Vogel wrote: >> Looks like something to do with system C, you might isolate it, and try >> a back >> to back connection with its NICs, change cables, look at BIOS settings, >> change >> the slot the nic is in... All just off the top of my head. >> >> Jack >> >> >> On Sat, May 8, 2010 at 9:41 AM, joe <joe_at_hostedcontent.com >> <mailto:joe_at_hostedcontent.com>> wrote: >> >> On 05/08/2010 11:17 AM, Ian FREISLICH wrote: >> >> joe wrote: >> >> On 05/08/2010 06:55 AM, Ian FREISLICH wrote: >> >> joe wrote: >> >> I have just tried your suggeston and it has >> no effect for me ;( >> >> >> Do you have another brand of NIC that you can try? At >> least that >> will isolate whether it's igb(4) or something else. >> >> >> I will grab a new nic today and try...my options are limited >> though. >> Here are the nics i can get my hands on >> >> TP-LINK TL-TG3468, 10/100/1000Mbps PCIe Adapter (supported >> by fbsd?) >> >> >> Based on the RTL8168B chip. Should be supported by the re(4) >> driver. >> >> Intel (EXPI9301CT) Gigabit CT Desktop Adapter (yet another >> intel nic) >> >> >> i82574L chip. Should be supported by the em(4) driver. I >> have had >> good performance in the past with this driver and less than >> satisfactory performance with the igb(4) driver. >> >> That may not be your problem though. Before you go out and buy, >> have a look at the amount of interrupt time your slow machine >> spends >> in 'top' or 'systat -vm'. systat will also show the interrupt >> rate >> for each driver, perhaps it's not doing interrupt moderation >> properly. >> This will manifest as more than about a 1000 per second. >> There are >> loader tunables for the driver to increase the number of transfer >> descriptors and to tune interrupt moderation. >> >> You could try running trafshow (port) on the interface while >> performing the transfer. Perhaps promiscuous mode will turn off >> some hardware feature that will improve things. It may however >> break hardware vlanning as it does on my 82575GB 4 port igb card. >> >> Ian >> >> -- >> Ian Freislich >> >> >> I bought those two cards anyways, im in a rush to figure out this >> problem. That being said i am still encountering the exact same >> problem regardless on which network card i am running. I am at a >> complete loss. I am about to try a raid card to see if the problem >> might lay within the onboard sata ports. I did pull the server and >> brought it home so that i can test more things quicker. >> >> I am going to try using a raid card instead of the onboard sata >> ports and see if i still encounter the same problem. I would love >> any suggestions you may have on where to go from here to figure out >> where the problem might be. >> >> joe >> >> _______________________________________________ >> freebsd-current_at_freebsd.org <mailto:freebsd-current_at_freebsd.org> >> mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-current >> To unsubscribe, send any mail to >> "freebsd-current-unsubscribe_at_freebsd.org >> <mailto:freebsd-current-unsubscribe_at_freebsd.org>" >> >> > > I think it might have something to so with the nics / switch, and their > features. I brought the box home, plugged into my gb switch, and i am > able to FTP data to the server at around 35MB/sec. > > I dont know what would cause this other than some sort of issue with the > the 3 different types of nics and the switch i am using. > > Any suggestions? > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" > >Received on Wed May 12 2010 - 12:40:34 UTC
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