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Date: Mon, 26 Sep 2011 11:16:01 -0700 From: Rick Jones <rick.jones2@...com> To: frog1120@...il.com CC: "J.Hwan.Kim" <j.hwan.kim99@...il.com>, netdev@...r.kernel.org, netdev <netdev@...r.kernel.org> Subject: Re: intel 82599 multi-port performance On 09/26/2011 08:42 AM, J.Hwan.Kim wrote: > On 2011년 09월 26일 23:20, Chris Friesen wrote: >> On 09/26/2011 04:26 AM, J.Hwan Kim wrote: >>> Hi, everyone >>> >>> Now, I'm testing a network card including intel 82599. >>> In our experiment, with the driver modified with ixgbe and multi-port >>> enabled, >> >> What do you mean by "modified with ixgbe and multi-port enabled"? You >> shouldn't need to do anything special to use both ports. >> >>> rx performance of each port with 10Gbps of 64bytes frame is >>> a half than when only 1 port is used. >> >> Sounds like a cpu limitation. What is your cpu usage? How are your >> interrupts routed? Are you using multiple rx queues? >> > > Our server is XEON 2.4GHz with 8 cores. > I'm using 4 RSS queues for each port and distributed it's interrupts to > different cores respectively. > I checked the CPU utilization with TOP, I guess ,it is not cpu imitation > problem. 99 times out of 10, by default top will show the average CPU utilization across all the "CPUs" of the system. So I will ask the pedantic question - Did you check per-CPU utilization or just overall? rick jones -- 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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