Epyc VM to VM networking slow
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No obvious solution yet, it's likely due to an architecture problem on AMD, because of CCDs and how CPUs are made. So the solution (if there's any) will be likely a sum of various small improvements to make it bearable.
I'm going to Santa Clara to discuss that with AMD directly (among other things).
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@olivierlambert No more EPYC's here, that's for sure. In the future it'll be Intel again (even if they then belong to Broadcom and TMC :p)
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@olivierlambert said in Epyc VM to VM networking slow:
No obvious solution yet, it's likely due to an architecture problem on AMD, because of CCDs and how CPUs are made. So the solution (if there's any) will be likely a sum of various small improvements to make it bearable.
I'm going to Santa Clara to discuss that with AMD directly (among other things).
Do we have other data to back this? The issue is not really common outside of Xen. I do hope some solution comes out from the meeting with AMD.
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If we become partners officially, we'll be able to have more advanced accesses with their teams. I still have hope, it's just that the pace isn't on me.
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@olivierlambert
Can we rule out extra_guest_irqs as the root cause of this problem?https://docs.xcp-ng.org/compute/#nvme-storage-devices-on-linux -
It's probably completely unrelated, but feel free to test
