Messages in this thread | | | Subject | Re: RSS mode performance in ixgbe (82599) driver | From | Eric Dumazet <> | Date | Tue, 09 Aug 2011 14:43:28 +0200 |
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Le mardi 09 août 2011 à 21:03 +0900, J.Hwan Kim a écrit : > Hi, everyone > > I'm testing the RSS mode throughput of Intel ixgbe 82599 driver. > My server's specification is Xeon 3GHz (4cores) and PCIe speed is > 2.5Gx8lanes, > and DD2 memory is about 600~700MHz. > > When I enable the RSS(receive side scaling) mode with 4 Rx queues, > the Rx performance is below than when I use a single queue. > > I don't know how the cores operate, whether the cores run in sequence > or simultaneously at the same time. > > I want to know the mechanism in general how the multi-cores run > and the reason why the performance of ixgbe driver in rss mode is below > non-rss mode.
CC netdev, as these kind of stuff is better hosted on netdev
You should make sure your 4 rx queues are serviced by different cpus, or else, one cpu could be the bottleneck.
cat /proc/interrupts
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