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Message-ID: <4F2B53F1.6080405@redhat.com> Date: Fri, 03 Feb 2012 11:26:41 +0800 From: Jason Wang <jasowang@...hat.com> To: Jason Wang <jasowang@...hat.com> CC: netdev@...r.kernel.org, davem@...emloft.net, linux-kernel@...r.kernel.org, glommer@...allels.com, mst@...hat.com Subject: Re: [v3.3-rc2+ PATCH] tcp: properly initialize tcp memory limits On 02/02/2012 06:07 PM, Jason Wang wrote: > Commit 4acb4190 tries to fix the using uninitialized value > introduced by commit 3dc43e3, but it would make the > per-socket memory limits too small. > > This patch fixes this and also remove the redundant codes > introduced in 4acb4190. > > Signed-off-by: Jason Wang<jasowang@...hat.com> > --- Just FYI, this fix the tcp performance regression, I test the virtio-net tcp performance: without this patch: [root@...-6168-8-1 net-next]# netperf -H 192.168.100.4 -t TCP_MAERTS TCP MAERTS TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.100.4 (192.168.100.4) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 5997.95 with this patch: [root@...-6168-8-1 net-next]# netperf -H 192.168.100.4 -t TCP_MAERTS TCP MAERTS TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.100.4 (192.168.100.4) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 9670.98 -- 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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