使用并行包删除僵尸进程 [英] Remove zombie processes using parallel package

问题描述

在我基于 Debian 的机器上使用 R 的并行包玩了一段时间后，我仍然找不到在计算后删除所有僵尸子进程的方法.

After I have played around for some time using R's parallel package on my Debian-based machine I still can't find a way to remove all zombie child-processes after a computation.

我正在寻找通用且独立于操作系统的解决方案.

I'm searching for a general and OS independent solution.

下面是说明 2 个内核问题的简单脚本:

Below a simple script illustrating the problem for 2 cores:

library(parallel)
testfun <- function(){TRUE}

cltype <- ifelse(.Platform$OS.type != "windows", "FORK", "PSOCK")
cl <- makeCluster(2, type = cltype)
p <- clusterCall(cl, testfun)
stopCluster(cl)

不幸的是，这个脚本在进程表中留下了两个僵尸进程，只有在 R 关闭时它们才会被杀死.

Unfortunately, this script leaves two zombie processes in the process table which only get killed if R is shut down.

推荐答案

这似乎只是FORK"集群的问题.如果您改为创建PSOCK"集群，则当您调用 stopCluster(cl) 时，进程将终止.

This only seems to be an issue with "FORK" clusters. If you make a "PSOCK" cluster instead, the processes will die when you call stopCluster(cl).

是否有任何因素阻止您在基于 Debian 的机器上使用PSOCK"集群?

Is there anything preventing you from using a "PSOCK" cluster on your Debian-based machine?

这篇关于使用并行包删除僵尸进程的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！