excessive TCP duplicate acks?
Andre Oppermann
andre at freebsd.org
Wed Feb 21 16:05:49 UTC 2007
Andre Guibert de Bruet wrote:
> On Feb 20, 2007, at 2:31 PM, Andrew Gallatin wrote:
>
>> Thanks for reporting this. I'm glad I'm not the only one who is
>> seeing this!
>
>
> I discovered this while testing out a new multi-homed bonded-T1
> installation. I was wondering why I was getting no more than ~170KB/ s.
> So far, here are the data points that I have gathered:
>
> - It affects more than one type of NIC (em0).
> - It happens regardless of hardware checksum enabled status.
> - It happens independent of IP aliasing.
> - I tested GENERIC as of Feb 19 and it is affected.
> - A kernel from December 15th, 2006 exhibits this problem.
> - The affected system is connected to a Linksys 24-port unmanaged
> gigabit switch (I have the exact same hardware working just fine with
> 5.5-STABLE on the same switch).
Today I finally got some spare time and tried to track this down. However
there is no obvious smoking gun to be seen. I'll dig further.
--
Andre
More information about the freebsd-current
mailing list