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Date: Fri, 17 Sep 2010 11:34:46 +0400 From: "\"Oleg A. Arkhangelsky\"" <sysoleg@...dex.ru> To: Amit Salecha <amit.salecha@...gic.com> Cc: netdev@...r.kernel.org Subject: Re: [PATCH NEXT 3/5] qlcnic: vlan lro support 17.09.2010, 11:10, "Amit Salecha" <amit.salecha@...gic.com>: >> -----Original Message----- >> From: Eric Dumazet [mailto:eric.dumazet@...il.com] >> Sent: Thursday, September 16, 2010 6:57 PM >> To: Amit Salecha >> Cc: davem@...emloft.net; netdev@...r.kernel.org; Ameen Rahman; Anirban >> Chakraborty >> Subject: Re: [PATCH NEXT 3/5] qlcnic: vlan lro support >> >> Le jeudi 16 septembre 2010 à 06:14 -0700, Amit Kumar Salecha a écrit : >>> LRO + GRO + vlan rx accleration support, performance increases >>> around 20% and cpu utilization reduces around 70% on vlan interface. >> Interesting. What is the workload that demonstrates such gains ? > > Just to demonstrate decrease in cpu utilization further: > I have taken numbers with various load. I used iperf application to run tcp traffic on vlan interface. > There is around 80-90% of reduction in cpu utilization. I'm wondering, how can this scale further. For example if I have 200K low speed simultaneous TCP connections (router appliance case with many users). Can GRO give us some gain here? -- wbr, Oleg. -- 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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