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Date: Tue, 26 Apr 2011 19:10:01 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Dominik Kaspar <dokaspar.ietf@...il.com> Cc: Carsten Wolff <carsten@...ffcarsten.de>, netdev@...r.kernel.org Subject: Re: Linux TCP's Robustness to Multipath Packet Reordering Le mardi 26 avril 2011 à 18:58 +0200, Dominik Kaspar a écrit : > Hi Eric, > > On Mon, Apr 25, 2011 at 5:38 PM, Eric Dumazet <eric.dumazet@...il.com> wrote: > > > > Since you have at sender a rule to spoof destination address of packets, > > you should make sure you dont send "super packets (up to 64Kbytes)", > > because it would stress the multipath more than you wanted to. This way, > > you send only normal packets (1500 MTU). > > > > ethtool -K eth0 tso off > > ethtool -K eth0 gso off > > > > I am pretty sure it should help your (atypic) workload. > > I made new experiments with the exact same multipath setup as before, > but disabled TSO and GSO on all involved Ethernet interfaces. However, > this did not seem to change much about TCP's behavior when packets are > striped over heterogeneous paths. You can see the results of four > 20-minute experiments on this plot: > > http://home.simula.no/~kaspar/static/mptcp-emu-wlan-hspa-01-tos0.png > > Cheers, > Dominik Hi Dominik Any chance to have a pcap file from sender side, of say first 10.000 packets ? -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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