Non-server CPU compatibility - Ryzen and Intel
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According to the reviews above, we can conclude that the new platform on AM5 is fully supported by version 8.2 ?
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T tjkreidl referenced this topic on
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There is very little information on this issue
I'll ask you again more specifically hereWho used the MSI MEG X670E ACE?
Since there have already been not very good reviews on specific models for example ASUS
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I will write for information.
There is a configurationMSI MEG X670E ACE
Ryzen 9 7950X
2 x 96Gb DDR5 5600MHz G.Skill Ripjaws S5
Version 8.2.1 could not be installed
When IOMMU is enabled, I get Kernel Panic at the beginning of the installation
If IOMMU is disabled, the installation begins, the initial boot takes place, then even before the first graphical installation interface and a black screen appear...
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It should work with 8.3, also it would work with an updated 8.2 ISO containing 2023's fixes about this
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@olivierlambert
Hmmm...
I tried installing from this iso
https://mirrors.xcp-ng.org/isos/8.2/xcp-ng-8.2.1.iso?https=1In the end, yes, I installed 8.3 beta1
However, I lost the use of this server as part of my 8.2 pool
I thought I saw that you were planning to release 8.3 before the end of the year? -
This ISO is not containing the fix.
@stormi do we have a "experimental" recent 8.2 ISO around containing the fix so it can be used in that case?
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@olivierlambert Yes: https://nextcloud.vates.fr/index.php/s/5GHSMojntLKT5z5
With SHA256SUM being
172e295f561dc567251302a1a7670aa5cc07d495fec67428a25e3e837ff1a4a4 -
Ah great, please test it @alex821982 that might be exactly what you seek
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Thank you, I will try to check in the coming days
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From this ISO, the installation went fine
I will test further... -
Great
The ISO is "just" a refreshed 8.2 with more updated baked into it, so you shouldn't have any problem to use XCP-ng after that! -
@olivierlambert will it be fixed all of the IOMMU?
I'm still very running very stable 8.3, but I'm not using right now pcie passthroguh and SR-IOV. But I'm planning to in the next month or so.
Also some issue I've got from the internal 2,5gb nic. Realtek one.
Not having much trouble with the ASUS board so far.
I woule like to move to 2x48GB, 4x32, or 4x48gb. Affordable performance/price ratio. -
For consumer grade hardware, 8.3 is better: it's also easier to integrate updates without risking stuff unlike for an LTS.
The IOMMU thing is already fixed in 8.3 and recent 8.2
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@olivierlambert Using Asrock Rack boards, I have had zero p roblems on this; that said, I am -VERY- eager to throw a new Threadripper (7000) into an XCP-NG setup; I am constantly looking at ways to significantly bump multi-run SQL Services as well as our custom app; and just the idea of passing through sets of ML cards on all those PCI-E lanes for some off-site workstation payloads is drool worthy. Ramp that up with 1TB or so of DDR5? I know -exactly- where that can go.
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A part of my lab uses "regular" but recent Ryzen CPUs with decent DD5, the results are pretty nice
So I can imagine how great could be 7000 series Threadrippers 
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@olivierlambert said in Non-server CPU compatibility - Ryzen and Intel:
Great
The ISO is "just" a refreshed 8.2 with more updated baked into it, so you shouldn't have any problem to use XCP-ng after that!It also was created with new ISO generation scripts and hasn't undergone QA testing, so it's not ready yet to be an official release. No particular issues are expected, but no promises either until it receives the QA stamp.
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D Danp referenced this topic on
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May I ask a question?
Long time XCP-ng user on Xeon CPUs, I am now considering one AMD Ryzen 9 7950X3D for a new XCP-ng 8.3 setup.
(All running VMs will be Linux)The question is:
Is XCP-ng kernel (currently 4.19 on XCP-ng 8.3) able to support the boosted CPU frequencies of the CPU? That is up to 5.7 GHz.
Or is the hypervisor kernel irrelevant?To my knowledge (also from several bare-metal setups) proper frequency boost for Zen4 is possible only by using newer kernels (actually enabling "amd_pstate" driver is needed).
Is the kernel inside the VM that counts here? I mean enabling "amd_pstate" driver inside the VM it enough to reach the 5.7GHz freqs?
Or is the hypervisor kernel (4.19) a limitation to reach those high frequencies?Thank you.
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IIRC, boost is the real of Xen, not the Dom0 kernel (because Xen deals with memory and CPU, not the Dom0, which is a VM). Sometimes the frontier is blurry and it's not trivial to know (or decide when you dev it) who should handle what. I'll ask around to be sure about boost responsibility (even if I'm pretty sure it's Xen)
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@olivierlambert said in Non-server CPU compatibility - Ryzen and Intel:
I'll ask around to be sure about boost responsibility (even if I'm pretty sure it's Xen)
Thank you!
I guess the amd_pstate driver is not backported on 4.19 kernel that XCP-ng uses, right?
If anyone with a Zen4 CPU can check the CPU frequencies that VMs are able to reach by default, I guess this would be useful.
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@gecant said in Non-server CPU compatibility - Ryzen and Intel:
If anyone with a Zen4 CPU can check the CPU frequencies that VMs are able to reach by default, I guess this would be useful.
I have a Ryzen 9 7900 which reports this:
[14:50 xenserver ~]# xenpm get-cpufreq-para 0 cpu id : 0 affected_cpus : 0 cpuinfo frequency : max [3700000] min [3000000] cur [3000000] scaling_driver : powernow scaling_avail_gov : userspace performance powersave ondemand current_governor : ondemand ondemand specific : sampling_rate : max [10000000] min [10000] cur [20000] up_threshold : 80 scaling_avail_freq : 3700000 *3000000 scaling frequency : max [3700000] min [3000000] cur [3000000] turbo mode : enabledBut i might have disabled boost in BIOS for power saving - i can check later
Also very interested in details on the support of newer Ryzens. From what i understand power management for new zen architectures is fairly recent in the kernel so i do wonder how well supported these cpu's are currently.
From xenpm output it does not appear to scale below 3GHz - my previous intel cpu would scale to 800MHz.
