Performance Analysis and Evaluation of PCIe 2.0 and Quad-Data Rate InfiniBand

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High-performance systems are undergoing a major shift as commodity multi-core systems become increasingly prevalent. As the number of processes per compute node increase, the other parts of the system must also scale appropriately to maintain a balanced system. In the area of high-performance computing, one very important element of the overall system is the network interconnect that connects compute nodes in the system. InfiniBand is a popular interconnect for high-performance clusters. Unfortunately, due to limited bandwidth of the PCI-Express fabric, InfiniBand performance has remained limited.