Bernard,

I did some tests and also with my rtl8139 card I found the same slowness
using rsync. I didn't notice that because for my previous tests I always
used bittorrent. In fact the strange thing is that other protocols
doesn't seem to be affected to that slowness!! Moreover it doesn't seem
to be a network issue. I tried also to copy a file locally in the client
and it gives the same performance over the network (from 500KB/s up to
max 1MB/s). So it seems that the process is CPU bound and not I/O
bound... and the problem seems to happen only with 2.6.16 kernel (with
another kernel performance are great as usual!)

I'm trying to figure where exactly is the problem...

Cheers,
-Andrea

Bernard Li wrote:
> Hi Andrea:
> 
> I'm pretty sure the problem I'm having is specific to 3.7.2 - I just
> imaged the same node using 3.5.3 and it was running at full speed.
> I'm just wondering whether the network card was brought up at half
> duplex or something - is there a way for me to figure that out with a
> driver loaded in kernel?
> 
> Anyways I have not tried your suggestion regarding disabling NAPI
> yet, since that functionality is for e1000 and I have a e100 card,
> but I might try it later (I think in 2.6.16, NAPI is enabled by
> default and there is no way for me to turn it off).
> 
> If you have any other ideas, please let me know.
> 
> Thanks,
> 
> Bernard
> 


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