bash - 如何在 aprun 中获得排名

Question

我正在尝试使用 aprun 运行多节点作业。但是，我无法弄清楚如何在 bash 环境中获得等级(或作为每个工作的 ID 的任何东西)。就像这个简单的工作:

aprun -n 8 -N 2 ./examplebashscript.sh

我怎样才能获得每个派生职位的排名？如果没有等级或任何唯一的作业 ID，此 aprun 行只会运行完全相同的程序 16 次，这是不可取的。

我一直在阅读文档，令人惊讶的是我找不到任何解释 aprun 提供的默认变量的内容。

我之前使用过 mpirun，我知道如何使用 C 和 Python 程序获取每个作业的排名值，但在 Bash 中则不知道。 aprun 的文档更少。

Answer 1

一种可行的方法是编写一个包装器脚本，该脚本可以获取要运行的任务列表，然后将每个任务生成一个单独的脚本。

在您的片段中，您似乎希望每个计算节点运行 2 个脚本实例以总共获得 8 个，因此，在您的作业脚本中，您可以执行如下操作:

for (( i=0; i<8; i+=2 )); do
   aprun -n 1 ./wrapper.sh $i 2 &
done
wait

然后在 wrapper 中你可以做类似的事情(其中 $j 给你你的唯一索引):

end=$(( $1 + $2 ))
for (( j=$1; j<$end; j+=1 )); do
   ./examplebashscript.sh $j &
done
wait

您还可以设置以下环境变量来获取各种进程和线程的位置。在运行“aprun”之前，您需要在 shell(或作业脚本)中设置这些:

export MPICH_CPUMASK_DISPLAY=1
export MPICH_RANK_REORDER_DISPLAY=1

例如，运行:

aprun -n 24 ./examplebashscript.sh

(等同于的速记):

aprun -n 24 -N 24 -S 12 -d 1 ./examplebashscript.sh

将在 STDERR 上为您提供以下类型的输出(注意这是在 XC30 上，每个计算节点有两个 Intel Ivy Bridge 12 核处理器，因此由于存在超线程，掩码显示每个节点有 48 个核心):

[PE_0]: MPI rank order: Using default aprun rank ordering.
[PE_0]: rank 0 is on nid02749
[PE_0]: rank 1 is on nid02749
[PE_0]: rank 2 is on nid02749
[PE_0]: rank 3 is on nid02749
[PE_0]: rank 4 is on nid02749
[PE_0]: rank 5 is on nid02749
[PE_0]: rank 6 is on nid02749
[PE_0]: rank 7 is on nid02749
[PE_0]: rank 8 is on nid02749
[PE_0]: rank 9 is on nid02749
[PE_0]: rank 10 is on nid02749
[PE_0]: rank 11 is on nid02749
[PE_0]: rank 12 is on nid02749
[PE_0]: rank 13 is on nid02749
[PE_0]: rank 14 is on nid02749
[PE_0]: rank 15 is on nid02749
[PE_0]: rank 16 is on nid02749
[PE_0]: rank 17 is on nid02749
[PE_0]: rank 18 is on nid02749
[PE_0]: rank 19 is on nid02749
[PE_0]: rank 20 is on nid02749
[PE_0]: rank 21 is on nid02749
[PE_0]: rank 22 is on nid02749
[PE_0]: rank 23 is on nid02749
[PE_23]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000100000000000000000000000
[PE_22]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000010000000000000000000000
[PE_21]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000001000000000000000000000
[PE_0]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000000000001
[PE_20]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000100000000000000000000
[PE_9]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000001000000000
[PE_11]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000100000000000
[PE_10]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000010000000000
[PE_8]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000100000000
[PE_1]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000000000010
[PE_2]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000000000100
[PE_18]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000001000000000000000000
[PE_7]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000010000000
[PE_15]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000001000000000000000
[PE_3]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000000001000
[PE_6]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000001000000
[PE_16]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000010000000000000000
[PE_14]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000100000000000000
[PE_13]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000010000000000000
[PE_12]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000001000000000000
[PE_4]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000000010000
[PE_5]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000000000000000100000
[PE_17]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000000100000000000000000
[PE_19]: cpumask set to 1 cpu on nid02749, cpumask = 000000000000000000000000000010000000000000000000

您也许能够以某种方式捕获它以供使用。