并行Pout输出内容在log文件里的位置不确定是为什么？

JqBu

今天突然发现了一个奇怪的现象，如果是单核计算的话，输出的内容应该是这个顺序：

Solving 3-D cloud sprayCloud
pAmbient = 101571.1
Composite::collide
WeColl = 8.30375;  B = 0.693729;  delta = 0.6744853
Regime: Bouncing
Composite collision model:
nc_Composite_parcel =1
total collision number of Composite = 2
Ncoal = 0; Nbounc = 1; NSS = 1; NRS = 0
product the number of child parcel = 0

这和写代码时候想让他输出的位置是一样的；

但一旦并行后，输出的顺序就变成了这样：

Solving 3-D cloud sprayCloud
[1] Composite::collide
pAmbient = 101571.1
[0] Composite::collide
[1] Regime: Bouncing
Composite collision model:
nc_Composite_parcel =1
total collision number of Composite = 2
Ncoal = 0; Nbounc = 1; NSS = 1; NRS = 0
product the number of child parcel = 0

甚至还会在这种地方出现语句：

    Parcel fate (number, mass)      : patch (top|down|side)
      - escape                      = 0, 0
      - stick                       = 0, 0
    Temperature min/max             = 293, 293
    Mass transfer phase change      = 0
[1] Composite::collide
    D10, D32, Dmax (mu)             = 99.81255, 101.9875, 105
    Liquid penetration 95% mass (m) = 0.0006347351
    Liquid penetration_y 95% mass (m) = 0.0005967672

使用并行输出Pout后和写这些输出语句的先后位置就不一样了

请问各位大佬这是为什么呢？

星星星星晴

@jqbu @jqbu pout 是每个processor输出所以会出现乱的，所以你配合着mpirundebug

JqBu

@星星星星晴感谢回复😊 回头我研究研究这个mpirundebug