SG-3100 slow not getting gigabit.
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I keep doing testing and am getting a weird result now. My internet comes over a 60Ghz wireless link. Wireless, of course, is not rock solid like wired so I have avoided using it in my tests for the SG-3100 problem as much as possible.
I'm back to running iperf3 on the SG-3100, this maxes out at about ~650Mbit with 100% CPU, fine.
My network is: Internet-Switch-AP(23)----------AP(22)-Switch--Switch-pfsense.I have a linux box(192.168.9.2) on the same switch as the pfsense box(192.168.9.9.1), so testing to either is the same path.
Testing from the close AP (not going over the wireless part of the link) gives the following to the pfsense and linux boxes.GP# iperf3 -c 192.168.9.1 -t 40 Connecting to host 192.168.9.1, port 5201 [ 4] local 192.168.8.22 port 53356 connected to 192.168.9.1 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 82.5 MBytes 689 Mbits/sec 17 346 KBytes [ 4] 1.00-2.00 sec 74.6 MBytes 627 Mbits/sec 3 376 KBytes [ 4] 2.00-3.00 sec 77.7 MBytes 653 Mbits/sec 4 294 KBytes [ 4] 3.00-4.00 sec 73.9 MBytes 620 Mbits/sec 5 318 KBytes [ 4] 4.00-5.01 sec 82.8 MBytes 691 Mbits/sec 3 372 KBytes [ 4] 5.01-6.00 sec 79.8 MBytes 672 Mbits/sec 12 293 KBytes [ 4] 6.00-7.01 sec 75.6 MBytes 631 Mbits/sec 1 320 KBytes ^C[ 4] 7.01-7.08 sec 5.53 MBytes 599 Mbits/sec 0 334 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-7.08 sec 552 MBytes 654 Mbits/sec 45 sender [ 4] 0.00-7.08 sec 0.00 Bytes 0.00 bits/sec receiver iperf3: interrupt - the client has terminated GP# iperf3 -c 192.168.9.2 -t 40 Connecting to host 192.168.9.2, port 5201 [ 4] local 192.168.8.22 port 57128 connected to 192.168.9.2 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 114 MBytes 950 Mbits/sec 22 355 KBytes [ 4] 1.00-2.00 sec 111 MBytes 936 Mbits/sec 11 385 KBytes [ 4] 2.00-3.00 sec 112 MBytes 943 Mbits/sec 33 342 KBytes [ 4] 3.00-4.00 sec 112 MBytes 938 Mbits/sec 0 537 KBytes [ 4] 4.00-5.00 sec 112 MBytes 939 Mbits/sec 44 382 KBytes [ 4] 5.00-6.00 sec 111 MBytes 936 Mbits/sec 10 402 KBytes ^C[ 4] 6.00-6.98 sec 110 MBytes 938 Mbits/sec 10 443 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-6.98 sec 782 MBytes 940 Mbits/sec 130 sender [ 4] 0.00-6.98 sec 0.00 Bytes 0.00 bits/sec receiver iperf3: interrupt - the client has terminatedAs one can see, everything is normal for a 1Gbit network, with pfsense being maxxed out CPU wise for iperf3.
Now if I test again, but from the far side of the wireless link:
GP# iperf3 -c 192.168.9.1 -t 40 Connecting to host 192.168.9.1, port 5201 [ 4] local 192.168.8.23 port 51104 connected to 192.168.9.1 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 56.1 MBytes 469 Mbits/sec 0 776 KBytes [ 4] 1.00-2.01 sec 64.7 MBytes 542 Mbits/sec 0 776 KBytes [ 4] 2.01-3.02 sec 37.5 MBytes 310 Mbits/sec 0 776 KBytes [ 4] 3.02-4.02 sec 38.8 MBytes 325 Mbits/sec 0 776 KBytes [ 4] 4.02-5.03 sec 38.8 MBytes 321 Mbits/sec 0 776 KBytes [ 4] 5.03-6.01 sec 36.3 MBytes 310 Mbits/sec 0 776 KBytes [ 4] 6.01-7.02 sec 38.8 MBytes 322 Mbits/sec 0 776 KBytes [ 4] 7.02-8.02 sec 38.8 MBytes 325 Mbits/sec 0 776 KBytes [ 4] 8.02-9.02 sec 36.3 MBytes 305 Mbits/sec 0 776 KBytes [ 4] 9.02-10.01 sec 38.8 MBytes 327 Mbits/sec 0 776 KBytes [ 4] 10.01-11.00 sec 54.1 MBytes 458 Mbits/sec 0 776 KBytes [ 4] 11.00-12.00 sec 55.5 MBytes 465 Mbits/sec 43 580 KBytes [ 4] 12.00-13.00 sec 58.2 MBytes 488 Mbits/sec 0 650 KBytes [ 4] 13.00-14.02 sec 57.4 MBytes 474 Mbits/sec 0 694 KBytes [ 4] 14.02-15.05 sec 50.4 MBytes 411 Mbits/sec 0 740 KBytes [ 4] 15.05-16.01 sec 36.3 MBytes 316 Mbits/sec 0 740 KBytes ^C[ 4] 16.01-16.56 sec 21.3 MBytes 323 Mbits/sec 0 740 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-16.56 sec 758 MBytes 384 Mbits/sec 43 sender [ 4] 0.00-16.56 sec 0.00 Bytes 0.00 bits/sec receiver iperf3: interrupt - the client has terminated GP# iperf3 -c 192.168.9.2 -t 40 Connecting to host 192.168.9.2, port 5201 [ 4] local 192.168.8.23 port 38320 connected to 192.168.9.2 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.01 sec 83.4 MBytes 695 Mbits/sec 0 1.50 MBytes [ 4] 1.01-2.00 sec 92.8 MBytes 783 Mbits/sec 0 1.59 MBytes [ 4] 2.00-3.00 sec 74.9 MBytes 627 Mbits/sec 0 1.59 MBytes [ 4] 3.00-4.00 sec 94.0 MBytes 789 Mbits/sec 0 1.68 MBytes [ 4] 4.00-5.02 sec 73.5 MBytes 607 Mbits/sec 0 1.68 MBytes [ 4] 5.02-6.00 sec 52.5 MBytes 449 Mbits/sec 0 1.68 MBytes [ 4] 6.00-7.01 sec 48.8 MBytes 406 Mbits/sec 0 1.68 MBytes [ 4] 7.01-8.02 sec 48.8 MBytes 405 Mbits/sec 0 1.68 MBytes [ 4] 8.02-9.00 sec 45.0 MBytes 384 Mbits/sec 0 1.68 MBytes [ 4] 9.00-10.00 sec 48.8 MBytes 408 Mbits/sec 0 1.68 MBytes [ 4] 10.00-11.00 sec 63.1 MBytes 531 Mbits/sec 0 1.68 MBytes [ 4] 11.00-12.03 sec 86.0 MBytes 703 Mbits/sec 0 1.68 MBytes [ 4] 12.03-13.02 sec 47.5 MBytes 400 Mbits/sec 0 1.68 MBytes [ 4] 13.02-14.02 sec 48.8 MBytes 409 Mbits/sec 0 1.68 MBytes [ 4] 14.02-15.00 sec 52.1 MBytes 445 Mbits/sec 0 1.68 MBytes [ 4] 15.00-16.01 sec 46.3 MBytes 386 Mbits/sec 0 1.68 MBytes [ 4] 16.01-17.02 sec 48.8 MBytes 406 Mbits/sec 0 1.68 MBytes [ 4] 17.02-18.00 sec 54.8 MBytes 465 Mbits/sec 0 1.68 MBytes [ 4] 18.00-19.00 sec 85.3 MBytes 719 Mbits/sec 0 2.53 MBytes [ 4] 19.00-20.00 sec 93.0 MBytes 780 Mbits/sec 0 2.53 MBytes [ 4] 20.00-21.00 sec 93.0 MBytes 781 Mbits/sec 0 2.53 MBytes [ 4] 21.00-22.01 sec 88.3 MBytes 736 Mbits/sec 0 2.53 MBytes [ 4] 22.01-23.00 sec 92.5 MBytes 780 Mbits/sec 0 2.53 MBytes [ 4] 23.00-24.01 sec 94.4 MBytes 788 Mbits/sec 0 2.53 MBytes [ 4] 24.01-25.01 sec 89.0 MBytes 747 Mbits/sec 0 2.53 MBytes [ 4] 25.01-26.01 sec 89.7 MBytes 751 Mbits/sec 0 2.53 MBytes [ 4] 26.01-27.00 sec 92.0 MBytes 778 Mbits/sec 0 2.53 MBytes ^C[ 4] 27.00-27.17 sec 16.2 MBytes 804 Mbits/sec 0 2.53 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-27.17 sec 1.90 GBytes 600 Mbits/sec 0 sender [ 4] 0.00-27.17 sec 0.00 Bytes 0.00 bits/sec receiver iperf3: interrupt - the client has terminated GP#I don't understand this result. If a let it run longer, it the results don't change really. I am looking at what they peak at. The linux box peaks at about 780Mbit which is around the max on the link. The pfsense box peaks at 540Mbit (best case) or so.
I would assume the pfsense and linux boxes should give identical answers until we hit the CPU limit of iperf3 on the pfsense box, but that's not the case. The TCP congestion control seems to be behaving differently if it talks to the pfsense box vs the linux box? Is that expected?
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@david_moo said in SG-3100 slow not getting gigabit.:
The TCP congestion control seems to be behaving differently if it talks to the pfsense box vs the linux box? Is that expected?
Yes. pfSense is not optimised as a server, a TCP end point, so running iperf on it dircetly will almost always give a lower result then actually testing through it. Even allowing for that fact that iperf itself uses a lot of CPU cycles.
Steve
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@stephenw10
Great thanks, explained! -
I cannot get more than 480Mbps routed out of the SG-3100 . Getting ~600 would be an improvement for me.
So, why does process "[intr{mpic0: nmvneta1}]" use 100% of CPU when running iperf?
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It's interrupt load from the NIC.
Are you running iperf3 on the 3100 directly? Or that's just when running through it?
A number of things will appear as interrupr load like that, notably pf. So if you have a very large number of rules or traffic shaping or maybe something complex in the ruleset somehow that's where it will show when loaded.
Steve
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I'm running iperf between 2 nodes on different vlans... i.e., using the SG-3100 as a router/firewall only. With that I'm still maxed out at 480Mbps.... If I turn Suricata back on, it drops down to ~450. :(
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VLANs on the same interface? Try between different NICs if you can.
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@stephenw10
That's brilliant... OK, with using separate interfaces for VLANs, I was able to get 760Mbps with iperf. Still significantly shy of advertised performance, but probably as good as the current network design can sustain (i.e., using a single trunk port).Also, it's the same thing (different PID/NIC) that maxes out the CPU on the SG-3100....
[intr{mpic0: nmvneta0}]
[intr{mpic0: nmvneta1}] -
@msf2000
I think we need more of an explanation.....
If I am understanding correctly we have:
vlan #1 -> port 1 -> SG-3100 -> port 2 -> vlan #2.If that is the case, the the SG-3100 is routing in a very standard way and should be pushing in/out 940Mbps (max for a 1Gbit port) . It's not doing that, why? Can the SG-3100 not handle it?
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If both VLANs are using the switch ports they are sharing a single parent NIC.
The mvneta NIC/driver is single queue so only one CPU core can service it in any direction.
If you test between a VLAN on LAN and a VLAN on OPT, for example, you are using two NICs and hence two queues that both CPU cores can service.
I would not expect anything to have changed there between 2.4.5 and 21.0X.Steve
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The 760Mbps figure was routing between OPT1 and a LAN port. CPU was maxed with the nmvneta0 & 1 taking all of a core each.
I.e., this was my test setup:
Linux node 1 --> vlan #1 --> port 1 --> sg-3100 --> opt1 --> vlan 2 --> Linux node 2 -
@msf2000
Does it make sense (if possible) to try the same setup with no vlans? I really feel you should be in the ~940Mbps region (full speed 1Gbps) with a simple setup.some guy on the internet states:
it already known that the SG-3100 can’t do full gig speed over VLANs -
He's actually posing that as a question there. I wouldn't expect it to make that much difference I agree. Unless you were doing something like VLAN0 where everything has to go through netgraph. Or maybe the additional 8 bytes on the packet is somehow causing fragmentation.
A sanity check test here shows some reduction in throughput when the LAN is configuered with a VLAN to one of the switch ports.
Testing in 21.09 I see 936/919Mbps LAN to WAN without any VLAN tagging. And 938/831 with the client on a LAN side VLAN.That's local iperf3 testing with a single process.
Steve
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Re-tested same setup. Disabled Suricata this time, and my best time was 815 Mbps with Iperf. The CPU limit was only on mvneta0 this time (as mvneta0 hit 100% but mvneta1 hit 70% range).
Not quite gigabit range, but that is real-world.
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I also get only ~650Mb/s down from both fast.com and speedtest.net on my SG-3100. Ended up buying a second to redo the config in a sterile, factory default environment and came up with the same result. This is traffic in through WAN, out LAN1, with no shaping or filtering packages installed. Haven't hooked it up to an iperf server yet, but I'm not really interested in the synthetic load throughput. I get 1.2Gb down from my ISP, again from fast.com and speedtest.net, when directly connected to the CPE onboard LAN switchports. I don't see why this router should be halving that.
Edit: Changed my config slightly so I've three VLANs going through LAN1 as a trunk, set LAN4 as a single VLAN port for my "priority" clients (through which testing for 1Gb is performed), DOCSIS 3.1 service on WAN, 80Gb PPPoE failover on member down on OPT1. No improvement.
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@ashlm Following on...
top -aSH shows mvnet02 (WAN) hitting over 98% utilisation of CPU core, bufferbloat kicks in after around 30 seconds of load and packets start being dropped. 665Mb peak downloading a Steam game (interface dropped completely and failed over once during 5 minutes download). -
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