Canonical release a special Ubuntu kernel for Microsoft Azure, which now is more optimized for Azure.

This new kernel will offer the following features:

  • Infiniband and RDMA capability for Azure HPC to deliver optimized performance of compute intensive workloads on Azure A8, A9, H-series, and NC24r.
  • Full support for Accelerated Networking in Azure.  Direct access to the PCI device provides gains in overall network performance offering the highest throughput and lowest latency for guests in Azure.  Transparent SR-IOV eliminates configuration steps for bonding network devices.  SR-IOV for Linux in Azure is in preview but will become generally available later this year.
  • NAPI and Receive Segment Coalescing for 10% greater throughput on guests not using SR-IOV.
  • 18% reduction in kernel size.
  • Hyper-V socket capability — a socket-based host/guest communication method that does not require a network.
  • The very latest Hyper-V device drivers and feature support available.