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    [solved] pfSense (2.6.0 & 22.01 ) is very slow on Hyper-V

    Scheduled Pinned Locked Moved Virtualization
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    • D
      Dominixise @Dominixise
      last edited by

      @dominixise
      Also pftop while doing a speed testdom pfsense pftop.jpg

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      • stephenw10S
        stephenw10 Netgate Administrator
        last edited by

        No actual speedtesting shown there, was it filtered?

        All small packets, some MTU issue?

        Steve

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        • D
          Dominixise @stephenw10
          last edited by

          @stephenw10
          Sorry i am new to getting logs, try this onepacketcapture (1).zip

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          • stephenw10S
            stephenw10 Netgate Administrator
            last edited by

            Nearly! 😉

            You probably want to filter by the client IP you are running the test on, if you're capturing on LAN. And set the capture to, say, 5000 packets.

            Steve

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            • D
              Dominixise @stephenw10
              last edited by

              @stephenw10

              Okay thanks for the acknowledgment here is the new capture, I had to put the download on my webserver for download since its 5MB

              https://zebrita.publicvm.com/files/packetcapture(2).cap

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              • D
                Dominixise @Dominixise
                last edited by

                @dominixise
                Here is another one with just my host ip

                https://zebrita.publicvm.com/files/packetcapture(3).cap

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                • R
                  RMH 0
                  last edited by

                  A bit of digging and it looks like 2 issues to me.

                  One in Hyper-V which I have now got resolved, fix below (well for me anyhow)
                  One in pfsense that is missreporting throughput (I can live with that till a fix comes)

                  For Hyper-V I found this article on RSC https://www.doitfixit.com/blog/2020/01/15/slow-network-speed-with-hyper-v-virtual-machines-on-windows-server-server-2019/
                  Once I disabled RSC on all virtual switches my speed was back to normal. No restart needed, just go on to Hyper-V host, open powershell and input commands to disable RSC on each virtual switch.

                  These are commands I used

                  Get-VMSwitch -Name LAN | Select-Object RSC
                  Checks status, if true run next command LAN is my vswitch name

                  Set-VMSwitch -Name LAN -EnableSoftwareRsc $false
                  This disables RSC, re run first command to confirm it is disabled

                  If your vSwitch has a space in the name add "" around the name
                  Get-VMSwitch -Name "WAN #1" | Select-Object RSC

                  After applying speed is back to normal but pfsense seems to top out showing throughput at 60mb, even though I was getting over 500mb.

                  Anyhow, hope it helps thers on Hyper-V (this is a 2019 instance of Hyper-V)

                  D C J 3 Replies Last reply Reply Quote 11
                  • D
                    DonZalmrol @RMH 0
                    last edited by DonZalmrol

                    @rmh-0 fantastic find!

                    I can confirm this has resolved it for me to, I'll leave it as is until a fix comes out.

                    Speed with RSC enabled:
                    aa9d7a1f-03e1-4815-8854-27b95d33d70f-image.png

                    Speed with RSC disabled:
                    063932be-5af6-48e6-9189-946fb1ed99c3-image.png

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                    • Bob.DigB
                      Bob.Dig LAYER 8
                      last edited by

                      Disabling RSC did nothing good for me at least. Problem with super slow SMB-Share over VLAN persists.

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                      • stephenw10S
                        stephenw10 Netgate Administrator
                        last edited by

                        Mmm, RSC is TCP only so I guess that explains why you saw much better throughput with a UDP VPN.
                        But I'm unsure how the pfSense update would trigger that...

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                        • D
                          DonZalmrol @stephenw10
                          last edited by

                          @stephenw10 maybe with the new FreeBSD kernel release it activated some incompatible functions for Windows Server on a network card level? e.g. thanks to @RMH-0 I disabled RSC and it returned to a normal level.

                          I know that about 7 years ago I needed to turn off VMQ in a large environment due to a bug in it that caused the guest VMs to all work incredibly slow...

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                          • R
                            RMH 0 @DonZalmrol
                            last edited by

                            @donzalmrol If you do not mind a quick query as yours is OK now. Do you get a similar representation of throughput in pfsense in comparison to the spee test.

                            I get the below which is way different. Trying to see if I have another issue or if others have the same.

                            Speed.png

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                            • P
                              PaulPrior
                              last edited by

                              Disabling RSC did nothing for my environment. Inter-vLAN rate are still a fraction of what they were. Between machines on the same vLAN a file copy takes 3 seconds, between vLANs via the pfSense this jumps to 45-90 minutes.
                              ce0bdc46-a06f-4d01-a6de-5b1294b917ae-image.png

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                              • P
                                PaulPrior @PaulPrior
                                last edited by

                                @paulprior This is a file copy in action between vLANs. There are 10Gb\s virtual adapters!
                                3f1128cd-6128-4a0a-9cc8-77b7f99a6946-image.png

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                                • P
                                  PaulPrior @PaulPrior
                                  last edited by

                                  @paulprior From Windows:
                                  6a704438-ca12-4b3a-b5fd-0708f6efb385-image.png

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                                  • Bob.DigB
                                    Bob.Dig LAYER 8
                                    last edited by

                                    Maybe they are different problems, I for myself had no problem with my WAN speed from the beginning.

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                                    • P
                                      PaulPrior
                                      last edited by

                                      So, disabling RSC has restored the network speed between VMs behind the pfSense and the internet (HTTPS download speeds), but the inter-vlan SMB file copy speeds are awful. Not quite dial-up modem speeds but almost.

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                                      • stephenw10S
                                        stephenw10 Netgate Administrator
                                        last edited by stephenw10

                                        Neither of you using hardware pass-through?

                                        You both have VLANs on hn NICs directly?
                                        I could definitely believe it was some hardware VLAN off-load issue.

                                        What do you see in: sysctl hw.hn

                                        Steve

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                                        • Bob.DigB
                                          Bob.Dig LAYER 8 @stephenw10
                                          last edited by Bob.Dig

                                          @stephenw10 said in After Upgrade inter (V)LAN communication is very slow on Hyper-V, for others WAN Speed is affected:

                                          sysctl hw.hn


                                          hw.hn.vf_xpnt_attwait: 2
                                          hw.hn.vf_xpnt_accbpf: 0
                                          hw.hn.vf_transparent: 1
                                          hw.hn.vfmap:
                                          hw.hn.vflist:
                                          hw.hn.tx_agg_pkts: -1
                                          hw.hn.tx_agg_size: -1
                                          hw.hn.lro_mbufq_depth: 0
                                          hw.hn.tx_swq_depth: 0
                                          hw.hn.tx_ring_cnt: 0
                                          hw.hn.chan_cnt: 0
                                          hw.hn.use_if_start: 0
                                          hw.hn.use_txdesc_bufring: 1
                                          hw.hn.tx_taskq_mode: 0
                                          hw.hn.tx_taskq_cnt: 1
                                          hw.hn.lro_entry_count: 128
                                          hw.hn.direct_tx_size: 128
                                          hw.hn.tx_chimney_size: 0
                                          hw.hn.tso_maxlen: 65535
                                          hw.hn.udpcs_fixup_mtu: 1420
                                          hw.hn.udpcs_fixup: 0
                                          hw.hn.enable_udp6cs: 1
                                          hw.hn.enable_udp4cs: 1
                                          hw.hn.trust_hostip: 1
                                          hw.hn.trust_hostudp: 1
                                          hw.hn.trust_hosttcp: 1

                                          Is looking the same on both "machines".

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                                          • Bob.DigB
                                            Bob.Dig LAYER 8 @stephenw10
                                            last edited by Bob.Dig

                                            @stephenw10 I moved the Windows machine to a new vNIC and vSwitch, this time without VLAN. Problem stays, so seems not VLAN related.

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