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Achieving good scaling for fine-grained communication intensive applications on modern supercomputers remains challenging. In our previous work, we have shown that such an application -- NAMD -- scales well on the full Jaguar XT5 without long-range interactions; Yet, with them, the speedup falters beyond 64K cores. Although the new Gemini interconnect on Cray XK6 has improved network performance,...
Gemini, the network for the new Cray XE/XK systems, features low latency, high bandwidth and strong scalability. Its hardware support for remote direct memory access enables efficient implementation of the global address space programming languages. Although the user Generic Network Interface (uGNI) provides a low-level interface for Gemini with support to the message-passing programming model (MPI),...
Mycotic cervical carotid artery aneurysms are rare. We report one case successfully treated by resection and reconstruction with a saphenous vein interposition graft. A review of the English world literature revealed 22 additional cases. Principles of management include appropriate and timely antibiotic use, resection of the aneurysm, debridement of all infected tissue, and restoration of arterial...
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