Date: Fri, 12 Oct 2018 09:52:23 -0700 From: Navdeep Parhar <nparhar@gmail.com> To: Mike Tancsa <mike@sentex.net>, FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: 10G performance regression / difference cxl and ix RELENG11 vs HEAD Message-ID: <b02d8705-3901-8a0b-0059-7e5bb6a3d1c6@gmail.com> In-Reply-To: <19e8a60d-e2a4-691c-c208-48c123c66bb7@sentex.net> References: <19e8a60d-e2a4-691c-c208-48c123c66bb7@sentex.net>
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On 10/12/18 8:37 AM, Mike Tancsa wrote: > I was doing a quick iperf test with r339328 GENERIC-NODEBUG amd64, and > noticed I can no longer saturate a 10G nic with iperf3. I tried first > with the ix adapter, but was not sure if it was the driver or not. I > tried as well with a Chelsio and got similar numbers. > > # iperf3 -c 192.168.242.3 > Connecting to host 192.168.242.3, port 5201 > [ 5] local 192.168.242.2 port 50474 connected to 192.168.242.3 port 5201 > [ ID] Interval Transfer Bitrate Retr Cwnd > [ 5] 0.00-1.00 sec 997 MBytes 8.36 Gbits/sec 717 175 > KBytes > [ 5] 1.00-2.00 sec 975 MBytes 8.18 Gbits/sec 668 41.1 > KBytes > [ 5] 2.00-3.00 sec 880 MBytes 7.38 Gbits/sec 846 25.6 > KBytes > [ 5] 3.00-4.00 sec 523 MBytes 4.39 Gbits/sec 802 59.8 > KBytes > [ 5] 4.00-5.00 sec 520 MBytes 4.36 Gbits/sec 882 48.4 > KBytes > [ 5] 5.00-6.00 sec 543 MBytes 4.55 Gbits/sec 838 56.9 > KBytes > [ 5] 6.00-7.00 sec 556 MBytes 4.66 Gbits/sec 850 11.4 > KBytes > [ 5] 7.00-8.00 sec 538 MBytes 4.51 Gbits/sec 795 39.9 > KBytes > [ 5] 8.00-9.00 sec 540 MBytes 4.53 Gbits/sec 853 57.0 > KBytes > [ 5] 9.00-10.00 sec 503 MBytes 4.22 Gbits/sec 814 59.8 > KBytes > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bitrate Retr > [ 5] 0.00-10.00 sec 6.42 GBytes 5.52 Gbits/sec 8065 > sender > [ 5] 0.00-10.00 sec 6.42 GBytes 5.52 Gbits/sec > receiver The number of retries (the "Retr" column) should have been 0 in a controlled test like this. Is this the default stack with all default parameters or have you tuned TCP and/or sockets in any way? Regards, Navdeep
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