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NICs are increasingly complex and diverse, offering a wide range of hardware functionality to aid network protocol processing. Harnessing the power of NIC hardware requires the ability to control and reason about a variety of different feature sets in the network stack. Towards this goal, we propose Unicorn, a language for describing modern NICs. Unicorn offers a simple set of abstractions for modeling both NIC functionality and the state of a protocol stack. To evaluate its expressivity and potential, we present a nontrivial model for the Intel i82599 10GbE NIC, and an algorithm that uses graph embedding to optimize the use of NIC hardware in the network stack.

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Brasil is a self-contained service which can be deployed across a cluster to provide a dataflow workload distribution and communication aggregation mechanism. Together with our dataflow shell, named PUSH, it is intended to be used for the management of non-traditional super computing applications as well as provide a mechanism to manage in-situ analysis and vizualization of more traditional high performance computing simulations. This paper describes our experiences implementing and deploying a prototype of Brasil on a BlueGene/P supercomputer.