Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 12 May 2010 07:15:46 -0700
From:      Patrick Mahan <mahan@mahan.org>
To:        joe <joe@hostedcontent.com>
Cc:        Ian FREISLICH <ianf@clue.co.za>, Fabien Thomas <fabien.thomas@netasq.com>, Jack Vogel <jfvogel@gmail.com>, freebsd-current@freebsd.org
Subject:   Re: igb broken? Unexplained weirdness with intel 82576 nics on a supermicro board.
Message-ID:  <4BEAB812.5030203@mahan.org>
In-Reply-To: <4BE599B0.60203@hostedcontent.com>
References:  <4BE565E5.9030505@hostedcontent.com>		<4BE5303B.8050409@hostedcontent.com>		<4BE529FF.5000008@hostedcontent.com>		<C15B47BC-AF5F-4AF4-899C-98155EC5A4D4@netasq.com>		<E1OAhhO-00021o-DH@clue.co.za> <E1OAlmh-0002Dj-Mm@clue.co.za>		<4BE59434.9070308@hostedcontent.com>	<AANLkTikLmEwr15mPz9Hz1kB97dXUNhkOS8R47d68rm1z@mail.gmail.com> <4BE599B0.60203@hostedcontent.com>

next in thread | previous in thread | raw e-mail | index | archive | help
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@hostedcontent.com
>> <mailto:joe@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@freebsd.org <mailto:freebsd-current@freebsd.org>
>>     mailing list
>>     http://lists.freebsd.org/mailman/listinfo/freebsd-current
>>     To unsubscribe, send any mail to
>>     "freebsd-current-unsubscribe@freebsd.org
>>     <mailto:freebsd-current-unsubscribe@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@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
> 
> 



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4BEAB812.5030203>