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...-l -v -p 16777 -q 0 | dd bs=1M of=/dev/null First, I am testing dom0 10GBit ethernet performance. This is pretty important to me for storage replication between cluster nodes. I found that between both boxes with Debian Kernel or Debian bpo kernel on bare hardware, I can transfer about 520 up to 550MByte/s. Between two dom0 instances, I get only 200 up to 250MByte/s. I also tried the same between a dom0 and a plain hardware instance and the other way around. I tried Debian Xen and vanilla Xen and also using Debian Xen kernel and Debian bpo kernel as a dom0 kernel. I did try setting the dom0 memory...