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How's kernel support and VM support such as QEMU lately? I'm thinking to buy i7 for embedded OS dev but that sounds very tempting. I heard AMD CPUs had some bre
by kbumsik 7y ago
How's kernel support and VM support such as QEMU lately? I'm thinking to buy i7 for embedded OS dev but that sounds very tempting. I heard AMD CPUs had some breaking issues last year.
- reilly3000 7y agoI haven't had any issues with my 1st gen Threadripper for about a year now. I'm running Unraid with QEMU from that box and couldn't be happier with performance and reliability whilst running 2-5 VMs at once along with 20+ Docker containers. No issues with Windows 10 and *nix VMs; I haven't been brave enough to attempt a hackintosh yet though. When it was bad, it was so bad. I never wanted to know as much as I do now about IOMMU groups and PCIe lanes.
- vetinari 7y agoThere was breaking issue, but it didn't manifest automatically. It happened, when the 2nd gen TR arrived. It used the same mainboards, so all the manufacturers issued BIOS updates. Unfortunately, these updates claimed to support SEV (Secure Encrypted Virtualization). Linux of course tried to initialize it at boot/module load time and the entire thing went hanging, because TR CPUs do not support SEV, only EPYCs do. So there were the following fixes: 1) downgrade BIOS back to pre-TR2 version, 2) blacklist the ccp module; which would make kvm_amd non-functional, 3) wait for a fix in Linux kernel, which initializes SEV with a timeout. So it wasn't that tragic issue, if you had first gen TR.