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    Non-server CPU compatibility - Ryzen and Intel

    Scheduled Pinned Locked Moved Compute
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    • olivierlambertO Offline
      olivierlambert Vates 🪐 Co-Founder CEO
      last edited by

      With the same motherboard and the same BIOS settings/version?

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      • M Offline
        mgales @olivierlambert
        last edited by mgales

        His is closer to your board (I believe), and to one that @BlueBadger tried (ASUS Prime B650M-A II-CSM)

        My friend's board is: ASUS Prime B650M-A AX:
        https://www.asus.com/us/motherboards-components/motherboards/prime/prime-b650m-a-ax/

        He's using the Ryzen 9 7900 and isn't experiencing any problems with Linux VMs in XCP-ng.

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        • olivierlambertO Offline
          olivierlambert Vates 🪐 Co-Founder CEO
          last edited by

          An idea investigation would be to swap the X and non-X CPU and see if there's a diff.

          I'm under the impression it's more a motherboard issue (BIOS, or version) than anything else however šŸ¤”

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          • M Offline
            mgales @olivierlambert
            last edited by

            I talked to my friend about doing a processor swap test, but he's happy with the way his system is running and doesn't want to take a chance of messing something up. Sorry about that šŸ˜ž

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            • olivierlambertO Offline
              olivierlambert Vates 🪐 Co-Founder CEO
              last edited by

              Maybe there's others people in the community that could bring that info šŸ™‚

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              • B Offline
                BlueBadger
                last edited by

                I ordered a Ryzen 7900 last night and got it this morning. (Thanks Amazon).
                I just replaced the 7950x with the 7900 and things seem to work better.

                I can run now a AlmaLinux 8 VM without the nopv flag.
                I can now run Xen Orchestra without the nopv flag.

                I will do some more testing.

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                • M Offline
                  mgales @BlueBadger
                  last edited by

                  @BlueBadger - Thank you! Looking forward to see what else you learn.

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                  • B Offline
                    BlueBadger
                    last edited by

                    I was having issues (download stalls) with the onboard 2.5Gb NIC (RTL8125) on the ASUS Prime B650M-A II-CSM motherboard even after I switched from the Ryzen 7950x to the 7900.
                    My setup also includes a X540 10Gb NIC which seemed to be working well.

                    I swapped the motherboard back to the ASRock B650M PG Riptide and was still having issues with the onboard 2.5Gb NIC.

                    I disabled the onboard NIC and installed a second X540 and have not have any network issues so far.

                    I'm guessing there might be an issue with the r8125 driver.

                    Excluding the onboard 2.5Gb NIC, XCP-ng seems to run well on both motherboards.

                    The BIOS errors in dmesg don't seem to be causing any issues.
                    (The ASRock B650M PG Riptide seems like a nicer motherboard.)

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                    • olivierlambertO Offline
                      olivierlambert Vates 🪐 Co-Founder CEO
                      last edited by

                      That's… interesting šŸ¤” So the "X" series seems to have some issues in the end? It's weird since it should be very different than it's non-X counterpart.

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                      • A Offline
                        andyhhp Xen Guru
                        last edited by

                        So, we've had reports on xen-devel which look a little like this.

                        @BlueBadger are you able to switch back to your 7950x and try booting Xen with x2apic_phys=true ? It appears that the -X processors are missing a feature in their IOMMU and Xen was getting confused when setting up interrupt handling.

                        https://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=0d2686f6b66b4b1b3c72c3525083b0ce02830054 is at least part of the fix, but so far feedback on the mailing lists suggests it's not a complete fix.

                        B 2 Replies Last reply Reply Quote 1
                        • B Offline
                          BlueBadger @andyhhp
                          last edited by

                          @andyhhp Thanks for the info.
                          I plan to leave my current machine (Ryzen 7900) as is since it seems to be running well.
                          I plan to build a new machine with the extra 7950x. The motherboard is on back order.
                          I will try the new setting once it is built.

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                          • B Offline
                            BlueBadger @andyhhp
                            last edited by

                            @andyhhp I built a new machine with my Ryzen 7950x.
                            Booting Xen with x2apic_phys=true did not seem to fix any issues.
                            šŸ˜ž

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                            • olivierlambertO Offline
                              olivierlambert Vates 🪐 Co-Founder CEO
                              last edited by

                              Interesting, thanks for the feedback. @andyhhp should we provide a Xen version with the initial fix and see if it's better? (maybe combined to the x2apic param)

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                              • S Offline
                                Sam
                                last edited by

                                I'm testing this combo:

                                • AMD RYZEN 9 7900X
                                • ASUS PRIME X670-P WIFI bios 1406
                                • 2x32GB KINGSTON 5600 CL40 (max QLV)
                                • Boot drive NVME 250gb (chipset) and SN850X 4.0 1TB on CPU.

                                With setting: Local APIC Mode = X2APIC and UEFI set to Other OS. Installed 8.3 alpha and updated, got errors. Test installing XOA took too much time and booting was painfully slow using only 1 SSD on chipset NVME.

                                Tried disabling IOMMU, but the same issue.

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                                • olivierlambertO Offline
                                  olivierlambert Vates 🪐 Co-Founder CEO
                                  last edited by

                                  It's possible we got a fix, but we need sometime to generate the right build/RPM for you to test šŸ™‚

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                                  • S Offline
                                    Sam @olivierlambert
                                    last edited by

                                    @olivierlambert said in Non-server CPU compatibility - Ryzen and Intel:

                                    It's possible we got a fix, but we need sometime to generate the right build/RPM for you to test šŸ™‚

                                    I have to identical setups for testing. With all the storage being pcie and interrupts. I also got a instlall with proxmox, but kind of same issues with IOMMU, trying to passtrough the 4.0 nvme. The disk was very slow, CPU wise performance on W11 machine was great.

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                                    • olivierlambertO Offline
                                      olivierlambert Vates 🪐 Co-Founder CEO
                                      last edited by

                                      I'm almost sure the future patch will fix the slow CPU behavior šŸ™‚ Hang on!

                                      peanutyostP 1 Reply Last reply Reply Quote 0
                                      • peanutyostP Offline
                                        peanutyost @olivierlambert
                                        last edited by

                                        @olivierlambert said in Non-server CPU compatibility - Ryzen and Intel:

                                        I'm almost sure the future patch will fix the slow CPU behavior šŸ™‚ Hang on!

                                        Any update on when this fix is available. I got a x series cpu and am having these same problems.

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                                        • olivierlambertO Offline
                                          olivierlambert Vates 🪐 Co-Founder CEO
                                          last edited by

                                          We need to take a closer look, it's in our backlog but we also have other stuff pending (as you can imagine). Let me ping @stormi about this.

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                                          • stormiS Offline
                                            stormi Vates 🪐 XCP-ng Team
                                            last edited by stormi

                                            In theory we now have the relevant patches. We'll try to provide a patched build in the coming days, either this week or the next.

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