On Fri, 2012-02-17 at 13:33 -0500, David Miller wrote: > From: Eric Dumazet <eric.dumazet@xxxxxxxxx> > Date: Fri, 17 Feb 2012 10:50:39 +0100 > > > Le vendredi 17 février 2012 à 16:18 +0800, Alex,Shi a écrit : > >> The tcp_stream loop back performance has about 10% drop on the > >> commitment on our core2 2 sockets server. This commit has 2 > >> parents(7505afe28, 5983fe), but both of them have no regression. So > >> guess the impact just happened when this 2 parents joint. That beyond > >> our capability to dig it more. > >> > >> Any ideas? > > > > Most probably the more accurate truesize determination is responsible of > > this tcp regression, since some prior assumptions might be wrong. > > > > Want to give more information on the workload ? > > Is it a 32 or 64 bit kernel ? > > And let's start CC:'ing netdev too. Add CC to tang feng, He is working on this issue. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html