On Fri, 2015-11-06 at 14:30 -0700, David Ahern wrote: > On 11/6/15 2:18 PM, Simon Xiao wrote: > > The .config file used to build linux-next kernel is attached to this mail. > > Thanks. > > Failed to notice this on the first response; my brain filled in. Why > linux-next tree? Can you try net-next which is more relevant for this > mailing list, post the top commit id and config file used?
Throughput on a single TCP flow for a 40G NIC can be tricky to tune. Make sure IRQ are properly setup/balanced, as I know that IRQ names were changed recently and your scripts might have not noticed... Also "ethtool -c eth0" might show very different interrupt coalescing params ? I too have a Mellanox 40Gb in my lab and saw no difference in performance with recent kernels. Of course, a simple "perf record -a -g sleep 4 ; perf report" might point to some obvious issue. Like unexpected segmentation in case of forwarding... -- 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
