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Parallel programs need to manage the trade-off between the time spent in synchronization and computation. The time trade-off is affected by the number of active threads significantly. High parallelism may decrease computing time while increase synchronization cost. Furthermore thread locality on different cores may impact on program performance too, as the memory access time can vary from one core...
Parallel programs need to manage the trade-off between the time spent in synchronization and computation. A high parallelism may decrease computing time while increase synchronization cost among threads. A way to improve program performance is to adjust parallelism to balance conflicts among threads. However, there is no universal rule to decide the best parallelism for a program from an offline view...
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