CAJ | 학술논문

在太阳质子事件期间,传输到近地轨道的太阳高能质子通量显著增强, 给飞行器安全带来挑战.由于太阳质子空间分布不均,能量差异极大,使得太阳高能质子的地磁场传输模拟的计算规模巨大.本文借助超级计算机,采取对等模式和主从模式实现了对太阳高能质子轨迹模拟的并行化.两种模式对比显示,主从模式能够有效的维持负载均衡,达到更突出的加速比,而且主从模式下大的计算量和任务粒度对大的处理器规模的性能影响更加显著.
재태양질자사건기간,전수도근지궤도적태양고능질자통량현저증강, 급비행기안전대래도전.유우태양질자공간분포불균,능량차이겁대,사득태양고능질자적지자장전수모의적계산규모거대.본문차조초급계산궤,채취대등모식화주종모식실현료대태양고능질자궤적모의적병행화.량충모식대비현시,주종모식능구유효적유지부재균형,체도경돌출적가속비,이차주종모식하대적계산량화임무립도대대적처리기규모적성능영향경가현저.
In solar proton events, flux of solar energetic protons increases significantly in low earth orbit, which posts a challenge to space crafts' safety. Due to the wide range of space distributions and energy levels of the protons, computational simulation of solar proton's geomagnetic transmission is in an enormous scale. In this paper, we adopt two strategies, that is, SPMD and master-slave, to parallelize the simulation of solar proton's transmission in super computers. The results show that master-slave mode is able to address load balance effectively and achieve far better speedup. Moreover, large amount of computation and task grain size has more significant influences on large-scale processors under master-slave mode.