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On Fri, Dec 09, 2005 at 11:22:47AM +0530, Conio sandiago wrote: > Hello Willy, > Thanks a lot for reply. > i have done some more investigation and now i have the following observation:- > > > 1) When i analyse the packets using ethereal, > i saw some duplicate Acks from the reciever, after which > transmitter does fast -re transmission, > In this transmission i saw some TCP checksum incorrect messages. > > > > 2) Now if i disbale the DCACHE in the system , And then do the ftp, > everything works well. > > > > No my doubt is > > a) When does a transmitte do Fast Retransmission,? when there is a high packet loss rate > b) if i disbale the cache then system performance goes very slow, > thats why everything goes well, so probably you have a timeing problem in your driver. Maybe you has to wait milliseconds somewhere and you wait microseconds instead, or something like this. > c) what is the case of collsion in the ethernet driver?? I don't understand your question. It's not the driver which makes ethernet collisions. Collisions happen when several ethernet transmitters send simultaneously on the same bus (hub). > Please help > Thanks in advance > conio Willy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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