SOLVED: Degraded TCP performace on Intel PRO/1000

[Mike Jakubik]

On Thu, May 12, 2005 3:27 am, Marian Durkovic said:
> Hi,
>
>
> On Wed, May 11, 2005 at 06:38:48PM -0400, Mike Jakubik wrote:
>
>> Any luck submitting the patch for this?
>>
>
> Yes, it's kern/80932

Good stuff, ill test it when i get a chance.

>
>> I looked at Intels website, and the latest drive for FreeBSD 4.7 is
>> 1.7.35.
>>
>
> 1.7.41 could be found at:
>
>
> http://downloadfinder.intel.com/scripts-df-external/filter_results.aspx?s
> trTypes=all&ProductID=1068&OSFullName=FreeBSD*&lang=eng&strOSs=52&submit=
> Go%21

Should we not be using the 2.x driver? Intels website states that 1.7 is
for FreeBSD 4.x and that it is no longer maintained. The 2.x is for
FreeBSD 5.3+, and is maintained. I think this is a good chance to bring it
up to date.


>> Seems like i am getting half the performance when sending to the fbsd
>> box. Also, enabling jumbo frames does not help, and sometimes even
>> yields slightly slower results.
>
> Yes, that's exactly the problem my patch is addressing - for larger MTU
> sizes the TX FIFO is simply too small.

Oddly enough, i ran the same benchmark between that same server and
another freebsd box. However this time i ran it on 100mbit cards. A rl,
and an fxp on the original server (wich has the em card also). I got the
same results! Sending to the server gave me 11MB/s, but sending from it
gave me about 7-8MB/s. There may be a problem in -CURRENT.