On Tue, 2015-11-03 at 19:33 +0200, Denys Fedoryshchenko wrote: > Hi > > Recently i was testing shaping over single 10G cards, for speeds up to > 3-4Gbps, and noticed interesting effect. > > Shaping scheme: > Incoming bandwidth comes to switch port, with access vlan 100 > Outgoing bandwidth leaves switch port with access vlan 200 > Linux with Intel X710 connected to trunk port, bridge created, eth0.100 > bridged to eth0.200 > gso/gro/tso disabled (they doesn't work nice with shapers)
Well, this seems urban legend to me. Something that is repeatedly copied/pasted on many web pages since last century. Given the nature of qdisc (being protected by a spinlock), you absolutely want to have some kind of aggregation. I have a patch to allow a sysadmin to set a max gro segs value to incoming packets. You could play with it. Start with 4 segments, allow GSO/TSO on the output and watch performance coming back. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
