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 If I do a parallel transfer I get closer to the max. However, on RELENG11 I could do pretty close to a full 10G no problem with just a single stream. This is with a GENERIC-NODEBUG kernel using a couple of T520s back to back t5iov1_at_pci0:9:0:1: class=0x020000 card=0x00001425 chip=0x50011425 rev=0x00 hdr=0x00 vendor = 'Chelsio Communications Inc' device = 'T520-CR Unified Wire Ethernet Controller' class = network subclass = ethernet bar [10] = type Memory, range 64, base 0xf6680000, size 524288, enabled bar [18] = type Memory, range 64, base 0xf6600000, size 524288, enabled bar [20] = type Memory, range 64, base 0xf688a000, size 8192, enabled cap 01[40] = powerspec 3 supports D0 D3 current D0 cap 05[50] = MSI supports 8 messages, 64 bit, vector masks cap 10[70] = PCI-Express 2 endpoint max data 512(2048) FLR RO NS link x8(x8) speed 8.0(8.0) -- ------------------- Mike Tancsa, tel +1 519 651 3400 x203 Sentex Communications, mike_at_sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario CanadaReceived on Fri Oct 12 2018 - 13:37:18 UTC
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