关键词: 多片多核, 线程调度, 切换延时, 性能测试

Abstract: In a multi-chip multi-core computer system, the indirect cost of thread context switch is affected by the architecture, workload and scheduling strategy. In order to gain a more stable result, the measurement for thread context switch should take account of these factors. Based on the analysis of the Lmbenchs framework and working principle, a new program called LTC was designed and implemented. Considering the requirements of thread performance measurement, load models and scheduling policies were integrated into the LTC. The result shows that LTC is a good tool for analyzing the cost of thread context switch in a multicore system.

Key words: multi-chip multi-core, thread scheduling, switch latency, performance evaluation