(Replying-all this time) Did you try to set these settings that ESnet recommends? https://fasterdata.es.net/host-tuning/freebsd/
We don't use iperf3 here at Intel (we use netperf instead), so I'm not sure I can be much help diagnosing what's wrong. On Wed, Jul 20, 2016 at 5:39 PM Chris Dunbar <ch...@dunbar.net> wrote: > Hello, > > I am new to FreeBSD and recently built a file server out of new components > running FreeBSD 10.3. I installed an Intel X540-T2 10 Gb NIC and am > experiencing what I consider to be slow transfer speeds. I am using iperf3 > to measure the speed and test the results of modifications. So far nothing > I have done has made a noticeable difference. If I run iperf3 -s on the > FreeBSD server, I see transfer speeds of approximately 1.6 Gb/s. If I run > iperf3 in client mode, the speed improves to ~2.75 Gb/s. However, if I > replace FreeBSD with CentOS 7 on the same hardware, I see iperf3 speeds > surpassing 8 GB/s. The other end of my iperf3 test is a Windows 10 box that > also has an Intel X540-T2 installed. > > I did notice that FreeBSD 10.3 (and 11.0 alpha 6 for that matter) includes > a slightly older Intel driver (v3.1.13-k). I managed to build a custom > kernel that removed the Intel PRO/10GbE PCIE NIC drivers. That allowed me > to manually load the latest 3.1.14 driver downloaded from Intel's web site. > Unfortunately that did not produce any improvements. I am working my way > through man tuning() and some other articles on network performance. So far > nothing I tweak makes a noticeable difference. I'm increasingly skeptical > that I am going to find a setting or two that more than doubles the speed I > am currently experiencing. > > I am open to any and all suggestions at this point. > > Thank you! > Chris > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org" > _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
