Messages in this thread | | | Subject | Re: TCP_STREAM performance regression on commit b3613118 | From | Eric Dumazet <> | Date | Fri, 17 Feb 2012 10:50:39 +0100 |
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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 ?
cat /proc/sys/net/ipv4/tcp_rmem cat /proc/sys/net/ipv4/tcp_wmem netstat -s
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