trixi-framework/Trixi.jl

Calculate timestep only once for equations with constant propagation speed

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#216 创建于 2020年10月11日

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 (0 评论) (0 反应) (0 负责人)Julia (686 star) (153 fork)batch import
enhancementgood first issueperformancetaal

描述

For example, scalar advection and hyperbolic diffusion have constant propagation speeds, thus the time step needs to be calculated only once after each change of the mesh. This can be a performance improvement, especially when doing parallel simulations, where it saves one blocking collective communication per time step.

For this to work, first #215 needs to be resolved.

贡献者指南

技术栈
无
领域
performance
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
3-5 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
needs investigation
前置要求
Resolve Trixi.jl issue #215
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
15
研究方向
First, issue #215 must be resolved. Then, identify the equations in Trixi.jl that have constant propagation speeds, such as scalar advection and hyperbolic diffusion. The timestep calculation logic is likely in the time integration routines. The goal is to compute the timestep only once per mesh change instead of every time step, which will save blocking collective communication in parallel simulations.
Calculate timestep only once for equations with constant propagation speed · trixi-framework/Trixi.jl#216 | Good First Issue