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Message-ID: <1340026144.7491.1231.camel@edumazet-glaptop> Date: Mon, 18 Jun 2012 15:29:04 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Stefan Priebe - Profihost AG <s.priebe@...fihost.ag> Cc: Linux Netdev List <netdev@...r.kernel.org> Subject: Re: unstable 10GBE performance with recent kernels (> 3.0.X) On Mon, 2012-06-18 at 15:07 +0200, Stefan Priebe - Profihost AG wrote: > Am 18.06.2012 14:51, schrieb Eric Dumazet: > > On Mon, 2012-06-18 at 14:36 +0200, Stefan Priebe - Profihost AG wrote: > >> Am 18.06.2012 12:25, schrieb Eric Dumazet: > >>> I would remove all this (pretty old and obsolete) stuff and use > standard > >>> params. > >> OK, thanks. done. > >> > >> I've one RHEL6 system (using default 2.6.32 kernel) where only using > >> "ntuple on" results in just 4-5Gbit/s while the others using 3.5.0-rc2 > >> are working fine. > >> > > > > OK, then you might play with affinities, that's the only thing that > > might need sysadmin tuning (irqbalance needs to be disabled) > > I've now used this one: > > # script provided by intel > /root/set_irq_affinity.sh eth2 > ifconfig eth2 mtu 9000 > ethtool -K eth2 ntuple on > > irqbalance is off > > But with the latest long term stable vanilla kernel 3.0.34. > > # iperf -c HOST -t 60 > > works fine but with -d for using both directions i see around 9.8Gbit/s > in one direction and only 300kb/s in the other direction. > > Stefan I would try using regular MTU. And post "netstat -s" results before/after your iperf. -- 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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