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Message-ID: <4FDEFD55.7010204@profihost.ag> Date: Mon, 18 Jun 2012 12:05:09 +0200 From: Stefan Priebe - Profihost AG <s.priebe@...fihost.ag> To: Eric Dumazet <eric.dumazet@...il.com> CC: Linux Netdev List <netdev@...r.kernel.org> Subject: Re: unstable 10GBE performance with recent kernels (> 3.0.X) Am 18.06.2012 11:45, schrieb Eric Dumazet: > On Mon, 2012-06-18 at 11:22 +0200, Stefan Priebe - Profihost AG wrote: >> Hello list, >> >> i've discovered very unstable 10GBE performance using recent kernels. >> I'm using some optimized settings mentioned by intel here >> (part:Improving Performance): >> http://downloadmirror.intel.com/5874/eng/README.txt >> > like what settings ? Sorry these ones: http://pastebin.com/raw.php?i=J2XRFAjD >> Any ideas? > > ethtool -S eth0 From host1 and 2: http://pastebin.com/raw.php?i=0Pp8Vs3Y > ethtool -k eth0 From host1 and 2: # ethtool -k eth2 Offload parameters for eth2: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off ntuple-filters: off receive-hashing: on # ethtool -k eth2 Offload parameters for eth2: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off ntuple-filters: off receive-hashing: on > netstat -s (on sender, on receiver) From host1 and 2: http://pastebin.com/raw.php?i=P9T96j0L > single flow , multiple flows ? host1: iperf -s host2: iperf -c ssdstor002 -d -t 600 -i 10; In this test i got around 7.4Gbit/s Stefan -- 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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