Yeah, this paper is amazing; anyone considering using the IOMMU or interested in performance at the PCIe level should read it.
We can also confirm their result about the IOMMU TLB size of only 64 on the CPUs we have here. (Yes, the TLB size is completely undocumented and there are no performance counters...)
Comments
Yeah, this paper is amazing; anyone considering using the IOMMU or interested in performance at the PCIe level should read it.
We can also confirm their result about the IOMMU TLB size of only 64 on the CPUs we have here. (Yes, the TLB size is completely undocumented and there are no performance counters...)