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Abstract : |
High-bandwidth, high-throughput applications with hard latency constraints are difficult to implement on a general-purpose parallel computer. Multiple developer-controlled ?trial-and-error ? cycles are usually needed before applications can reliably meet throughput and latency constraints, even on platforms having ample network bandwidth and computation power. Not only is reliable execution difficult to achieve for code developed in this manner, the code itself is difficult to modify or reuse without upsetting the delicate timing balance achieved. Local computation performance can usually be bounded, but communication performance is often more difficult to predict. While hardware-supported connections can offer minimal quality-ofservice bandwidth and latency guarantees, limited connection resources make scheduling the full application difficult. This, |
