Hi Simon! I think a note about "gro" is appropriate, for instance, in http://lwip.wikia.com/wiki/Tuning_TCP site.
Thank you very much! Regards, Norberto Em ter, 8 de jan de 2019 às 09:23, goldsimon <[email protected]> escreveu: > > > Am 8. Januar 2019 11:50:48 MEZ schrieb "Norberto R. de Goes Jr." < > [email protected]>: > >How are you? > > > >After a long time spent in this issue with debugging in my network > >drive > >(socket raw), lwip configuration tuning (lwipopts.h), my client code, > >etc, > >etc; I noted (using simhost -d) that large packets caused check-sum > >error > >in the lwip received side. So by searching in the internet, I found > >links > >relating to "offload segmentation". > >Resuming, when I disable the "gro" (generic-receive-offload) of the > >NIC > >that treats the lwip packets the problem disappears. > >Command (for eth0): > sudo ethtool -K eth0 gro off > >Verification: > ethtool -k eth0 | grep > >generic-receive-offload > > > >Please, does this make sense? > > Yes, it does. Sorry for not having found the time to dig into this. It has > been on my list... > > But it seems you found the reason. We should add this to our documentation > somewhere. Where would you have looks for this? > > Regards, > Simon > > _______________________________________________ > lwip-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/lwip-users > -- Norberto R. de Goes Jr. CPqD - DRC Tel.: +55 19 3705-4241 / Fax: +55 19 3705-6125 [email protected] <[email protected]> www.cpqd.com.br
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