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Pfsense high cpu usage KVM (Unraid)

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unraidhigh cpuvirtual nic
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  • S
    stephenw10 Netgate Administrator
    last edited by Sep 2, 2019, 9:56 PM

    It should not just of itself. There are many people running virtualised and not seeing that, including in KVM.

    Something about Unraids setup perhaps? I've never run that personally.

    Steve

    1 Reply Last reply Reply Quote 0
    • K
      kiokoman LAYER 8
      last edited by Sep 3, 2019, 10:32 AM

      indeed , i'm using kvm on my ubuntu server and i don't have this. idk what unraid is so i can't be of any help

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      • B
        BjornStevens
        last edited by Sep 3, 2019, 10:37 AM

        Maybe i should just try to reïnstall it. Shouldn't be that hard to do. Ill post more after some more testing.

        B 1 Reply Last reply Sep 4, 2019, 5:15 PM Reply Quote 0
        • B
          BjornStevens @BjornStevens
          last edited by Sep 4, 2019, 5:15 PM

          A reïnstall made no change, the cpu usage went up on 1 of the cores. during this test i even gave it 8 Cpu core's (4.0ghz) and 4GB of RAM. Download speed was 150mbit. So i have no clue what the option is other than the virtual nic or something...
          Sadly i dont have any other nics available to test with. Any suggestions on a step i might try out?

          Thanks!

          1 Reply Last reply Reply Quote 0
          • S
            stephenw10 Netgate Administrator
            last edited by Sep 4, 2019, 9:43 PM

            With vmx NICs you will need to add the following line to /boot/loader.conf.local to get multiple queue support:
            hw.pci.honor_msi_blacklist=0

            Reboot to apply that. Check the output of vmstat -i to be sure it's creating multiple queues.

            Be sure all hardware offloading support is disabled in Sys > Adv > Networking.

            Steve

            B 1 Reply Last reply Sep 5, 2019, 3:16 PM Reply Quote 0
            • B
              BjornStevens @stephenw10
              last edited by Sep 5, 2019, 3:16 PM

              @stephenw10

              Hi, Thanks for your reply,

              I tried to find the /boot/loader.conf.local file but could only find a /boot/loader.conf
              I tried adding it into there ( hw.pci.honor_msi_blacklist=0 ) but still no change.
              It has done something because it moved up in the file.

              During speedtest i get these results with vmstat -i:
              ae70e044-cd64-426d-aa9b-831bafb1867b-afbeelding.png
              And when using the top -S -H command still get the same results.

              Any other suggestions?

              Thanks!

              1 Reply Last reply Reply Quote 0
              • K
                kiokoman LAYER 8
                last edited by Sep 5, 2019, 5:57 PM

                you need to create the file
                /boot/loader.conf.local
                if it's missing
                copy inside
                hw.pci.honor_msi_blacklist=0
                save and reboot

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                we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
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                • S
                  stephenw10 Netgate Administrator
                  last edited by Sep 6, 2019, 3:35 AM

                  Yup create the file if it doesn't exist. If you put it in loader.conf it may get overwritten.

                  However that will only do anything for vmx NICs. You have em NICs there currently.

                  Steve

                  B 1 Reply Last reply Sep 6, 2019, 8:50 AM Reply Quote 0
                  • B
                    BjornStevens @stephenw10
                    last edited by BjornStevens Sep 6, 2019, 8:55 AM Sep 6, 2019, 8:50 AM

                    @stephenw10 Allright, will set them to VMXNET3, reboot, create the file with the line and inform if there are any changes.

                    Thanks for the help @kiokoman & @stephenw10 !

                    Creating config file:
                    982b0dd4-2c9c-4ecf-9ac8-be2915f3b4be-afbeelding.png

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                    • B
                      BjornStevens
                      last edited by BjornStevens Sep 6, 2019, 9:19 AM Sep 6, 2019, 9:02 AM

                      Okay so further testing will come in later but for now i seem to reach my maximum provider speed on my linux server behind the firewall:
                      30ee4f36-acce-4b80-9fbf-49be03d205a0-afbeelding.png

                      BUT it did drop back down to 14.4Megabyte's per second and go up and down all the time:
                      9e4f1f56-336e-4798-bf02-06b239e5bad7-afbeelding.png
                      Cpu usage seems to have set a bit:
                      e79a25f5-47e3-4adf-983d-fd919f94def1-afbeelding.png

                      Using SMB protocol i get this from moving a file WAN to LAN:
                      e45d4618-c85f-4ace-af3c-533642fda829-afbeelding.png

                      It's 2 virtual cores are running at nearly full power (cpu 6/7) (cpu 4 is being used on the server side in the LAN network.):
                      45cb9478-33ab-446f-b5ad-60bca539c805-afbeelding.png

                      I don't know if this is just a performance bug but speeds seem to have increased, altough cpu usage is still high (compared to the hardware specifications of pfsense)

                      Changing to a quad core (virtual processor) did not change much either, cpu usage stays high on 2 cores:
                      016158cd-9055-41c1-9087-e3bc4ac87e56-afbeelding.png

                      Wish i could put my finger on the issue.

                      1 Reply Last reply Reply Quote 0
                      • S
                        stephenw10 Netgate Administrator
                        last edited by Sep 6, 2019, 1:52 PM

                        I still only see one tx queue and one rx queue on each NIC. Does vmstat -i show more?

                        I assume you created that file in /boot

                        Steve

                        B 1 Reply Last reply Sep 6, 2019, 2:00 PM Reply Quote 0
                        • B
                          BjornStevens @stephenw10
                          last edited by Sep 6, 2019, 2:00 PM

                          @stephenw10

                          yep its placed under /boot/loader.conf.local
                          9c8aefad-741a-439a-9981-93582a95b5a6-afbeelding.png

                          vmstat -i during speedtest on server in lan side:
                          a7a528cf-d4b7-4795-bc21-5c250ff4579f-afbeelding.png

                          1 Reply Last reply Reply Quote 0
                          • B
                            BjornStevens
                            last edited by Sep 6, 2019, 2:04 PM

                            I actually don't know how to read the vmstat -i, but i hope you might know more @stephenw10

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                            • K
                              kiokoman LAYER 8
                              last edited by Sep 6, 2019, 2:10 PM

                              one queue

                              vmx0: tq0 (transmission queue 0)
                              vmx0: rq0 (receive queue 0)

                              with multiple queue you should see tq0 / tq1 etc etc

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                              we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
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                              1 Reply Last reply Reply Quote 0
                              • S
                                stephenw10 Netgate Administrator
                                last edited by stephenw10 Sep 6, 2019, 2:16 PM Sep 6, 2019, 2:11 PM

                                Yeah, that. Though I don't have anything vmx to test again right now.
                                I think it probably is working as you are seeing the high numbered IRQs which MSI uses.
                                Try removing that line or commenting it out and rebooting. Do you see any change?

                                On other NICs you might see something like:

                                [2.4.4-RELEASE][root@5100.stevew.lan]/root: vmstat -i
                                interrupt                          total       rate
                                irq7: uart0                          432          0
                                irq16: sdhci_pci0                    536          0
                                cpu0:timer                      68688188       1001
                                cpu3:timer                       1069435         16
                                cpu2:timer                       1060293         15
                                cpu1:timer                       1086989         16
                                irq264: igb0:que 0                 68630          1
                                irq265: igb0:que 1                 68630          1
                                irq266: igb0:que 2                 68630          1
                                irq267: igb0:que 3                 68630          1
                                irq268: igb0:link                      3          0
                                irq269: igb1:que 0                 68630          1
                                irq270: igb1:que 1                 68630          1
                                irq271: igb1:que 2                 68630          1
                                irq272: igb1:que 3                 68630          1
                                irq273: igb1:link                      1          0
                                irq274: ahci0:ch0                   4473          0
                                irq290: xhci0                         85          0
                                irq291: ix0:q0                    216643          3
                                irq292: ix0:q1                     47933          1
                                irq293: ix0:q2                    325480          5
                                irq294: ix0:q3                    514752          7
                                irq295: ix0:link                       2          0
                                irq301: ix2:q0                     74629          1
                                irq302: ix2:q1                       507          0
                                irq303: ix2:q2                      1703          0
                                irq304: ix2:q3                     89446          1
                                irq305: ix2:link                       1          0
                                irq306: ix3:q0                     70295          1
                                irq307: ix3:q1                      4985          0
                                irq308: ix3:q2                    186433          3
                                irq309: ix3:q3                    413486          6
                                irq310: ix3:link                       1          0
                                Total                           74405771       1084
                                

                                https://www.freebsd.org/cgi/man.cgi?query=vmx#MULTIPLE_QUEUES

                                Steve

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                                • K
                                  kiokoman LAYER 8
                                  last edited by Sep 6, 2019, 2:13 PM

                                  try to add this on your loader.conf.local

                                  hw.vmx.txnqueue="4"
                                  hw.vmx.rxnqueue="4"
                                  

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                                  Please do not use chat/PM to ask for help
                                  we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
                                  Don't forget to Upvote with the 👍 button for any post you find to be helpful.

                                  B 1 Reply Last reply Sep 6, 2019, 2:29 PM Reply Quote 1
                                  • B
                                    BjornStevens @kiokoman
                                    last edited by BjornStevens Sep 6, 2019, 2:31 PM Sep 6, 2019, 2:29 PM

                                    @kiokoman & @stephenw10

                                    I added the rule with
                                    hw.vmx.txnqueue="4"
                                    hw.vmx.rxnqueue="4"

                                    I did not see any change whatsoever in vmstat -i:
                                    5aef0aff-dddc-4b0e-936f-aead27b125d6-afbeelding.png

                                    and commenting out the first rule also did not change anything:
                                    1f593ee1-26de-4e5d-b6b4-e79c72ffecd6-afbeelding.png

                                    Edit:

                                    Even when doing a download on a server in LAN and using top -S -H i have this outcome:
                                    1adb31da-90e6-406b-99d7-968622a15c02-afbeelding.png

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                                    • S
                                      stephenw10 Netgate Administrator
                                      last edited by Sep 6, 2019, 3:31 PM

                                      You are seeing load on all CPUs there and none is at 100% so it's not CPU limited at that point.

                                      B 1 Reply Last reply Sep 6, 2019, 3:55 PM Reply Quote 0
                                      • B
                                        BjornStevens @stephenw10
                                        last edited by Sep 6, 2019, 3:55 PM

                                        @stephenw10 i have increased it before to 4 cores running at 4ghz. Right now i dont know what to do at all:( i really like the easy way of working with pfsense but i dont know what further investigation i can do because the cpu usage is skyrocket high with 250mbit/s

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                                        • S
                                          stephenw10 Netgate Administrator
                                          last edited by stephenw10 Sep 29, 2019, 7:25 PM Sep 6, 2019, 4:33 PM

                                          Yes, there is something significantly wrong with your virtualisation setup there. You can pass 250Mbps with a something ancient and slow like a 1st gen APU at 1GHz.

                                          Steve

                                          B 1 Reply Last reply Sep 6, 2019, 4:56 PM Reply Quote 0
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