100Mbit network performance - again

casey casey at phantombsd.org
Wed Jul 27 04:59:08 GMT 2005


Andrew P. wrote:

>On 7/27/05, Casey Scott <casey at phantombsd.org> wrote:
>  
>
>>>Hello all!
>>>
>>>I remember being able to reach 11-12Mbytes/s between two Win95
>>>workstations with NE2000 $10 NIC's installed, connected via BNC cable.
>>>I am now able to reach 11-12Mbytes/s between all kinds of Windows
>>>2000/XP machines with all kinds of cheapest 100Mbit ethernet hardware.
>>>
>>>But I have never ever exceeded 8-9Mbytes/s between a Windows machine
>>>and a FreeBSD box - _never_. Be it Samba, different ftp/http servers,
>>>different FreeBSD versions (4.x/5.x), with ipfw enabled or disabled,
>>>etc., - the speed always hovers around 7-8Mb/s. I know it's not
>>>critical, I know I should've upgraded to Gigabit hardware long ago,
>>>but is there something wrong?
>>>
>>>I tried different linux distros, but they all seem to be even slower.
>>>Wazzup?..
>>>
>>>Thanks,
>>>Andrew P.
>>>_______________________________________________
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>>>
>>>      
>>>
>>Keep in mind that the Windows TCP/IP window buffers are not optimized the
>>same way as FBSD or Linux.
>>
>>Casey
>>
>>
>>    
>>
>No doubt about that. Any thoughts about how to make them communicate
>more effectively?
>
>Personally, I don't think it's just window buffers. I think the whole
>darn TCP/IP stack misconfiguration plus maybe not perfect NIC drivers
>are the reason for underperformance. I know that most of the real
>"mistakes" must be on the Windows side, but that's not an excuse for
>FreeBSD/Linux to not be at least 99%-Windows-networking-compatible.
>
>Andrew P.
>  
>
Your best would be google for that. Its been so long ago, that I don't 
remember anything useful.

Sorry,
Casey


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