2 Replies Latest reply on Dec 13, 2017 12:40 PM by Intel Corporation

    Picking a workstation platform for VT-d / IOMMU - PCIe Passthrough


      While "C i9 + Asus MB" may seem like the obvious answer, I was hoping someone with experience could weigh in, as my experience is that it can be fickle.


      I've been trying to get multiseat working for some time.  Unfortunately, my previous platform was LGA1366/X58, which seems like it cannot be made to work beyond a single instance/seat (multiple instances crash each other's GPU driver, except in single disk configuration, meaning OS and all VM disks on sda).  AMDs new platform looked good on paper, but GPU passthrough is completely broken on Linux for almost all configurations.  RMA'ing a CPU or MB can be a hassle or impossible, so I want to be sure before I pull the trigger.


      Generally speaking, the requirements are pretty straightforward, but the last one is tricky:


      • A lot of cores
      • Good per core performance
      • Workstation motherboard (might as well be able to boot into windows and use SLI)
      • Properly implemented (i.e. no allow_unsafe_interrupts, proper ACS support so that my sound card does not write to my disk from time to time)


      Core i9 is certainly the best candidate on paper, however 90% of the time there will be only one instance running, so in the worst case scenario, a lower core count with better per core performance relative to i9 (if such a thing exists) would be an unfortunate by acceptable trade off.