Re: Significant capacity drop on loopback interface

2018-05-10 Thread Stephen Hemminger
On Thu, 10 May 2018 22:03:33 +0700 Naruto Nguyen wrote: > Hi Stephen, > > Thanks for your responding. But as I know kernel 4.4.104 has not included > Spectre/Meltdown fix yet, right? Yes. 4.4.104 doesn't have KPTI. That came in around 4.4.109

Re: Significant capacity drop on loopback interface

2018-05-10 Thread Stephen Hemminger
On Thu, 10 May 2018 15:35:59 +0700 Naruto Nguyen wrote: > Hello everyone, > > Recently, I used netperf to test the TCP performance on loopback > interface on my 2 nodes, one is installed kernel 4.4.103 and the other > is 3.12.61 > > netperf -l 100 -t TCP_RR > netperf -l 100 -t TCP_RR -- -D > >