IOMMU: Strategies for Mitigating the IOTLB Bottleneck - from Sixth Annual Workshop on the Interaction between Operating Systems and Computer Architecture- Nadav Ammit (@techion), Muli Ben-Yhhuda(@ibm), Ben-Ami Yassour(@ibm) The computational cost of the mapping and unmapping of memory regions in the DMAR units is therefore considered the main bottleneck. The IOMMU translates the virtual I/O addr..