Re: linux-next network throughput performance regression

[David Ahern]

On 11/6/15 1:31 PM, Simon Xiao wrote:
> I compared the network throughput performance on SLES12 bare metal servers, between SLES12 default kernel and latest linux-next (2015-11-05) kernel, based on the test results, I suspect there is a network regression exists on Linux-Next over the 40G Ethernet network:
> a) iperf3 reports 50% performance drop with single TCP stream on latest linux-next;
> b) iperf3 reports 10% ~ 30% performance drop with 2 to 128 TCP streams on latest linux-next;
> Another throughput benchmarking tool (ntttcp-for-linux) test result is also listed at the end of the email for reference.

Can you post your kernel config file?
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